Cephalic Plate Research Articles

New records, neotype designation and DNA sequences of three species of Chaetonotus (Gastrotricha: Chaetonotidae) from Brazil

Gastrotrichs are aquatic microinvertebrates (less than 1 mm long) commonly found in freshwater and marine environments worldwide. The taxonomy of gastrotrichs is mainly based on external morphological characters, such as body shape and size of the different body regions, presence and distribution of adhesive tubules, or the microstructure of the external cuticle (e.g. scales, spines, cephalic plates). The diversity of Gastrotricha is still poorly known, especially in tropical regions. The aim of this study is to use integrative taxonomy to report new records of Chaetonotus dadayi, C. paucisquamatus and C. furcatus from the states of São Paulo and Minas Gerais, Brazil. In this study we present 1) new records of C. dadayi in Brazil with new morphological information and a first-time comprehensive diagnosis of the species; 2) the redescription of C. paucisquamatus based on material collected at the type locality and the neotype designation; and 3) the first record of C. furcatus outside its type locality. We also discuss the actual occurrence of C. paucisquamatus and C. furcatus in Poland, given that both species were found in artificial environments with flora imported from South America.

Taxonomic Accounts and Phylogenetic Positions of the Far East Asian Centipedes Scolopocryptops elegans and S. curtus (Chilopoda: Scolopendromorpha).

The epigean centipede genus Scolopocryptops Newport, 1844 consists of two monophyletic lineages, the "Asian/North American" and "Neotropical/Afrotropical" groups. Most of the "Asian/North American" species bear the complete sulcus/sulci along the lateral margin of the cephalic plate and sternites lacking sulci, whereas Japanese Scolopocryptops elegans (Takakuwa, 1937) bears short lateral sulci on the cephalic plate and Taiwanese Scolopocryptops curtus (Takakuwa, 1939) lacks the cephalic marginal sulci, and both species bear a longitudinal sternal sulcus. The taxonomic accounts of S. elegans and S. curtus were revisited in this study based on newly collected specimens. We found that these two species share a characteristic of the second maxilla, that they lack the transparent margin on the dorsal brush, which distinguishes them from other "Asian/North American" species. Scolopocryptops elegans and S. curtus can be distinguished from each other by the characters of their antennal articles, cephalic plate, forcipular coxosternite, tergite 23, and coxopleuron. Phylogenetic analyses using nuclear 28S ribosomal RNA and mitochondrial cytochrome c oxidase subunit I sequences confirmed that S. elegans and S. curtus are closely related and form a single clade sister to a clade comprising all the other "Asian/North American" Scolopocryptops species.

A new species of Euclymene (Maldanidae, Annelida) from Brazil, with new combinations, and phylogenetic implications for Euclymeninae

Maldanids are tube-building polychaetes, known as bamboo-worms; inhabit diverse marine regions throughout the world. The subfamily Euclymeninae was proposed to include forms with anal and cephalic plates, a funnel-shaped pygidium, and a terminal anus. Euclymene, the type genus of Euclymeninae, has about 18 valid species. Euclymene vidali sp. nov. is defined and members of the species described from Northeastern Brazil. Members of this species have 23 chaetigers, and one pre-pygidial achaetous segment; nuchal grooves extend through three quarters of the cephalic plate, and there is one acicular spine with a denticulate tip. Euclymene africana, and E. watsoni, are here recognized, respectively, as Isocirrus africana comb. nov., and I. watsoni comb. nov. Three monotypic genera are invalid: Macroclymenella, Eupraxillella, and Pseudoclyemene; their species should be recognized as Clymenella stewartensis com. nov., Praxillella antarctica com. nov., and Praxillela quadrilobata com. nov., respectively. An identification key and a comparative table for all species of Euclymene are provided. A comparative table for all genera of Euclymeninae is also furnished. The paraphyletic status of Euclymene and Euclymeninae is discussed. The taxon Maldanoplaca is not code compliant and should only be regarded as an informal name.

Scolopocryptops longipes sp. nov., a troglobitic scolopocryptopine centipede (Chilopoda: Scolopendromorpha: Scolopocryptopidae) from China.

We describe Scolopocryptops longipes sp. nov., a new troglobitic scolopocryptopine centipede species from a karstic area in southern China. The species was found in Shuiba Cave of Libo County, Guizhou Province. The cephalic plate wider than long, with complete margination along the lateral margin of cephalic plate; TT619 with complete paramedian sutures; tibia, tarsus 1 and tarsus 2 of leg 22 each with one spur; prefemur and femur of ultimate legs glabrous, tibia and tarsi with dense bristles. S. longipes is the second troglobitic scolopocryptopine in China and the fourth in the world described thus far.

Description of a new and a known insect-associated species of the genus Halicephalobus Timm, 1956 (Panagrolaimidae: Rhabditida) along with intrageneric relationship

ABSTRACT A new species, Halicephalobus termitis sp. nov., and a known species, H. similigaster (Andrássy, 1952) Andrássy, 1974, are described and illustrated. Halicephalobus termitis sp. nov. was isolated from the head of termites (Rhinotermes lucifugus Rossi, 1792). Out of four populations of H. similigaster, two of them were isolated from the head of termites belonging to Odontotermes sp. and Rhinotermes lucifugus, while the remaining two populations were extracted from rotten wood and rotten bark. Halicephalobus termitis sp. nov. is characterised by a = 10.6–13.2; c’ = 2.6–3.2; lateral field with two ridges; lip region with sclerotised cephalic plate; lips small, arranged around hexagonal oral aperture; and dorsal wall of metastegostom conically projected into stomal lumen without discernible tooth. The relationship between congeners is discussed and an identification key is provided.

Does the fracture of the lateral wall affect the degree of collapse and the degree of sliding of the cephalic plate, in pertrochanteric fractures treated by intramedullary interlocking? Radiological study and review of the literature

BackgroundLateral wall fracture has been recognized as an important sign of instability of pertrochanteric fractures. The aim of the present study is to assess the relationship between lateral wall fractures, helical blade telescoping and neck shortening in fractures treated with intramedullary nailing. Material and methodA descriptive radiological study was performed at our institution. Patients who suffered a pertrochanteric fracture, treated at Hospital 12 de Octubre by intramedullary nailing were included. All fractures were classified according to Evans and AO systems. Preoperative and postoperative radiological assessment was carried out including a lateral wall fracture classification, helical blade telescoping and femoral neck shortening. Results210 patients were included, 48% had a fracture of the femoral lateral wall. Helical blade telescoping was higher in lower lateral wall fractures with respect to higher fractures. Difference was statistically significant. Neck shortening was higher in fractures with femoral lateral wall disruption; despite not have found any significant differences comparing to fractures with intact lateral wall (p = 0.39). Multivariate analysis showed statistically significant association between helical blade telescoping, neck shortening and lateral wall fracture. ConclusionsThere is evidence of a higher helical blade telescoping and neck shortening in pertrochanteric fractures with lateral wall fracture treated with intramedullary nails, especially in those with most unstable patterns such us fractures of the lateral wall distal to the vastus ridge.

A new species of Wellcomia (Nematoda: Oxyuridae) in the plains viscacha (Rodentia: Chinchillidae) from Argentina, an emended diagnosis and an update of the genus Wellcomia.

Wellcomia species (Oxyuridae, Syphaciinae) parasitise several families of rodents from Africa, Asia and America with diverse ecological characteristics. A new species of Wellcomia is described based on specimens obtained from the plains viscacha Lagostomus maximus (Chinchillidae) from Argentina. The description includes morphometric and ecological aspects and an emended diagnosis of the genus Wellcomia. In addition, a molecular characterisation (18S rRNA) and an exploratory analysis of the genetic distances of the species included in this genus are provided. The new species, Wellcomia hugoti n. sp., differs from other species of the genus in the morphology of the cephalic plate, the ventral rugose area in males and the vulva in females. The new species showed a low prevalence (7.7%) and a high mean abundance (73.8). The genetic distances detected do not allow a comprehensive assessment of the monophyly of the genus. This is the seventh record of this genus in rodents from the Americas, the second in rodents from Argentina and the first record for the family Chinchillidae.

Morphological and molecular characterization of Filenchus pseudodiscus n. sp. from east Golestan province, north Iran; with an updated phylogeny of Malenchus Andrássy, 1968 (Tylenchomorpha: Tylenchidae).

During a survey in Golestan province, north Iran, two populations belonging to the family Tylenchidae were recovered in association with Quercus sp., and a rotten wood sample of an unidentified forest tree. The first recovered species was mainly characterized by having a disc-like differentiation in the frontal end under the light microscope (LM), proposing it as a tentative member of the genus Discotylenchus. Detailed morphological studies using scanning electron microscope (SEM), however, did not reveal a true disc, but showing the smooth cephalic region, and a narrow annulus behind the cephalic plate. Based upon the cephalic region structure, and by lacking a true disc, the species was identified as a member of the genus Filenchus. This population was further characterized by 555 to 618 μm long females, lateral fields with four incisures, 9 to 10 μm long stylet, spermatheca large, including spheroid sperm, post-vulval uterine sac (PUS) 8 to 12 µm long and gradually tapering to an elongate conoid tail with pointed tip. It was compared with relevant species of Filenchus having four incisures in the lateral fields and similar general morphology. By having a disc-like differentiation in the frontal end under the LM, it was further compared with three similar known species of Discotylenchus. The morphological comparisons with species under two aforementioned genera showed the recovered population belongs to an unknown species, described herein as Filenchus pseudodiscus n. sp. The molecular phylogenetic relationships of the new species using partial small and large subunit ribosomal RNA gene (SSU and LSU D2-D3 rDNA) sequences were reconstructed and discussed. Malenchus gilanensis, the second recovered and studied species was originally established based upon traditional criteria. An updated LSU phylogeny of the genus Malenchus by including M. gilanensis was also presented and its results were discussed.

Gastrointestinal nematodes of Paramelomys levipes and P. mollis (Rodentia: Muridae) from Papua, Indonesia and Papua New Guinea with the descriptions of three new genera and nine new species (Nematoda).

Nematodes from four families comprising 18 species identified to species level, six to subfamily level as well as larval and adult heligmonellids and juvenile females of an undetermined family were recovered from eight individuals of Paramelomys levipes and 27 individuals of P. mollis (Muridae: Murinae: Uromys Division) from Papua New Guinea and Papua, Indonesia. Originally all the hosts were registered as P. levipes in the Australian and Bishop museum collections, but the probable identity of the host individuals was decided according to the altitude of the collection sites. A capillariid, Capillaria s. l., a putative species of the Nippostrongylinae and a small number of male and female nippostrongylins could not be identified further. The spirurid Protospirura kaindiensis had been previously reported from Sahulan Old Endemic fauna. The oxyurid Syphacia (Syphacia) dewiae n. sp. differed from all its congeners in having an oval laterally extended cephalic plate with a dorso-ventral constriction, cervical and lateral alae, a female tail up to 1400 long and a spicule up to 102 long. The remaining species, all heligmonellids included the brevistriatin Macrostrongylus ingens and 14 nippostrongylin species. Of these Hughjonestrongylus amplicauda, H. mirzai, H. singauwaensis, and Odilia mackerrasae had been reported previously in species of Paramelomys. Species of Flannerystrongylus and Parasabanema, possibly new species, could not be described further. Flannerystrongylus chisholmae n. sp., a smaller worm, differed from its congener F. abulus in having a spicule to body length ratio of 13.2% and only 6 eggs in utero. Helgenema keablei n. gen., n. sp. differed from the 44 nippostrongylin genera known to date in having a synlophe of 11- 15 small ridges and a left cuticular dilatation supported anteriorly by a single large ridge. Paramelomystrongylus dessetae n. gen., n. sp. differed from all other nippostrongylin genera in having a synlophe of 13-16 ridges with a type A carene supported by 2 hypertrophied ridges and the right lateral ridges larger than the dorsal and ventral ridges. Parasabanema sene n. sp. differed from its congener, P. szalayi, in having a synlophe of 30 ridges. Hughjonestrongylus alisoni n. sp., H. arfakiensis n. sp., H. digianiae n. sp. and H. spratti n. sp. were distinguished from all other species of Hughjonestrongylus and each other by a combination of characters including the number of synlophe ridges, 28, 21-26, 20-23, 22-25 respectively, in the mid body, spicule length, proportions of the ovejector and shape of the female posterior end. The combined helminth assemblage was dominated by heligmonellids, as has been reported for other paramelomys, with eight species as well as the oxyurid being unique to P. levipes and P. mollis. Overlapping of host habitat could account for the similarities of the nematode assemblages recorded for those species of paramelomys that have been studied.

A remarkable Newportia from the Colombian Andes, with the proposition of a new subgenus (Scolopendromorpha, Scolopocryptopidae, Newportiinae).

A new monotypic subgenus Newportia (Andeocryptops) subgen. n is described based on 18 specimens of N. (A.) shelleyi sp. n. This form is endemic to the Colombian Andes showing the following unique combination of morphological features: very short and thin, a cylindrical and not segmented ultimate tarsus 2, a "spinning-spur" (see below) on the ultimate tarsus 1, short paramedian sutures close to the anterior and posterior margins of cephalic plate, a tibial lateral spur and a glandular pore fields in the ultimate femur. An identification key to the Newportia subgenera, as well as a key to the Ectonocryptops, Ectonocryptoides and Andeocryptops species are included.

A new species of Clinodiplosis (Diptera: Cecidomyiidae) causing galls on Banisteriopsis membranifolia (Malpighiaceae), an endemic plant in Brazil

Clinodiplosisquartelensis sp. nov. (holotype male in MNRJ: Brazil, Minas Gerais State), a new gall midge species causing leaf galls on Banisteriopsismembranifolia (A. Juss.) B. Gates (Malpighiaceae), an endemic liana in Brazil, is described based on larva, pupa, adult male and female and its gall is characterized. Galls were collected in Quartel de São João, state of Minas Gerais, Southeastern Brazil. Larvae were removed from the galls and pupae and adults were obtained by rearing. Pupation takes place in the gall. The most important morphological characters were illustrated. The new species is compared with other Neotropical species of Clinodiplosis and belongs to the group with simple tarsal claws, curved beyond tarsus midlength. Clinodiplosisquartelensis sp. nov. shares the male cercus secondarily lobed, the 12th female flagellomere with setulose apical process, the deeply bilobed male hypoproct with convergent lobes, pupa lacking dorsal spines on abdominal segments, and larva with four pairs of setose terminal papillae with C.bellum from that might be distinguished by size of palpus, wing venation, level of sclerotization of eighth abdominal segment in the adults, as well as, by the pupal cephalic dorsal plate and larval spatula.

First report of a blue hue Schendylops (Geophilomorpha, Schendylidae),with a description of a new species from Southeastern Brazil.

The first report of a blue colored body in schendylid specimens is presented based on a description of Schendylops turmalina sp. nov. recorded from Southeastern Brazil. The female holotype is described and illustrated, and the variations observed in male paratypes and in a juvenile male from the same locality are given. The new species is characterized by having adults with an uninterrupted series of sternal pore-fields, from the first to the penultimate leg-bearing segments, undivided on the anterior and posterior part of the body and divided into two sub-symmetrical areas in the middle region. This characteristic can also be observed in Schendylops tropicus, S. coscaroni, S. parahyhae, S. inquilinus, S. grismadoi and S. demelloi. However, in addition to the blue hue present between the first and ultimate leg-bearing segments, S. turmalina sp. nov. differs from all the aforementioned species in having the following unique characteristics: antennae less than 2.5 times the length of the cephalic plate in both male and female; posterior margin of mid-part of labrum near-straight; forcipular tarsungulum with the internal edge serrate; tarsus 2 of the ultimate pair of legs with an apical tubercle which has two pore-like sensilla and is surrounded by two larger sensilla.

A new genus and species of pinworm (Nematoda, Oxyuridae) from the gray mouse opossum, Tlacuatzin canescens.

Tlacuatzoxyuris simpsoni n. gen. n. sp. is described from the cecum of the gray opossum, Tlacuatzin canescens, a species endemic to the deciduous dry forest of Mexico. The digestive tracts of four specimens were examined for parasites; three of these were archived in the American Museum of Natural History and one was a live capture. Relative to the other four monotypic genera of pinworms known to infect opossums, the new genus is diagnosed on the basis of a round cephalic plate with a semicircular stoma surrounded by a rim. In addition, males feature a prominent cephalic vesicle not fully developed in females, accounting for sexual dimorphism. The new species includes small worms that feature a conspicuous, not reticulated cephalic vesicle and semicircular stoma and lateral alae with two crests. In addition, the postcloacal cuticle of males features a small area with ornamentation between cloaca and submedial papillae. Finally, both spicule and gubernaculum are relatively short. Although the eggs of Tlacuatzoxyuris n. gen. are unknown, the conspicuous differences in traits used in the diagnosis of genera prompted us to propose a new genus for the new species. This is the first species of Oxyuridae reported in mouse opossums outside South America, and the fifth species of the family occurring in didelphimorph marsupials. This is an example of the usefulness of documenting the diversity of parasites associated with this unique clade of mammals through the examination of preserved tissues.

Blind scolopendrid centipedes of the genus

Only a single blind species is known in the centipede family Scolopendridae, representing the monotypic genus Tonkinodentus Schileyko, 1992, from Vietnam. All of more than 400 other species have four ocelli on each side of the cephalic plate. A complex of three new blind species of the genus Cormocephalus Newport, 1844, is described from the subterranean fauna of the central Pilbara region of Western Australia. Phylogenies based on sequence data for the barcode region of COI and a concatenated matrix that also includes 12S rRNA, 28S rRNA and ITS2 unite the blind Pilbara species as a monophyletic group, albeit with moderate bootstrap support, informally named the C. sagmus species group. Cormocephalus sagmus, C. pyropygus and C. delta spp. nov. supplement 17 epigean congeners previously described from Australia. The new species are all morphologically similar, but can be distinguished using the shape and spinulation of the ultimate leg prefemur. Two additional genetically distinct lineages were recovered that are not described, owing to the specimens being immature or lacking diagnostic morphological characters. The subterranean radiation in the Pilbara is more closely related to species from forests in the south-west of Western Australia than to congeners from the arid zone. http://zoobank.org/urn:lsid:zoobank.org:pub:6F67FD31-A373-4DC5-A5FD-374D32DEE02C

<i>Australobius polyspinipes</i> <b>sp. n.</b>, a new species of <i>Australobius</i> Chamberlin, 1920 (Lithobiomorpha: Lithobiidae) from China

Australobius polyspinipes sp. n. (Lithobiomorpha: Lithobiidae) was recently discovered from Tianheshan Mountain, Hebei Province, China, and it is described here. Morphologically the new species is similar to A. nodulus Ma, Song &Zhu, 2008 and A. magnus (Trozina, 1894), both recorded from China. The new species can be easily distinguished from those by having 7+7–8+8 coxosternal teeth, 10–12 ocelli on each side of the cephalic plate, 5+5 spurs on the first article of the female gonopods and differences in plectrotaxy of legs. The main morphological characters and a key to the known Chinese species of genus Australobius based on adult specimens is presented.

A new tardigrade species of the genus Neostygarctus Grimaldi de Zio et al., 1982 (Tardigrada, Arthrotardigrada) from the Great Meteor Seamount, Northeast Atlantic

A new species of Neostygarctus Grimaldi de Zio et al., 1982 is described from the Great Meteor Seamount summit plateau in the Northeast Atlantic. Neostygarctus grossmeteori sp. nov. is characterized by the number and position of dorsomedian spines (five spines on the cephalic plate and each body plate and on the caudal plate, the spines decreasing in length backwards); the presence of eyes and of one or two pairs of ventral cervical spines; a transversal row of two to five short but strong spikes on the ventral side of the lateral body processes; only the internal claws of each leg provided with a normal accessory spine. The new species is related to N. acanthophorus Grimaldi de Zio et al., 1982 but differs by details of the dorsal body spines and the sculptures, the presence of ventral neck spines and ventral spikes on lateral body projections. Neostygarctus grossmeteori sp. nov. differs from two other known species of Neostygarctus, N. oceanopolis Kristensen et al., 2015 (Condor Seamont, NE Atlantic) and N. lovedeluxe Fujimoto & Miyazaki, 2013 (submarine cave NW Pacific), even more obviously by the number and position of dorsal body spines.

Australobius tracheoperspicuus sp. n., the first subterranean species of centipede from southern China (Lithobiomorpha, Lithobiidae)

Australobiustracheoperspicuussp. n. (Lithobiomorpha: Lithobiidae) was recently discovered from the Cave of the brickyard of Gaofeng village, in the Guizhou Province, southwest China, and it is described here. Morphologically the new species is similar to A.magnus (Trozina>, 1894) from north-western China. The new species can be easily distinguished from those by the trachea connected to the valve of the TIII clearly visible from the dorsal side, the absence of ocelli on each side of the cephalic plate, the DaC spine being only present on the XIIIth–XVth legs. Numbers of examined specimens, distribution and the main morphological characters and an identification key to the known Chinese species of genus Australobius based on adult specimens is given.

The taxonomic status of the “forgotten” Bolivian snakes, Atractus balzani Boulenger 1898 and Atractus maculatus (sensu Boulenger 1896) (Serpentes: Dipsadidae)

The genus Atractus Wagler 1828 comprises almost 150 currently recognized species of cryptozoic snakes widespread in the Neotropics, occurring from Panama to northeastern Argentina (Passos et al. 2016a). Despite the publication of the descriptions of several new species within the last decade, the taxonomy of the genus is unclear in some instances. This is mainly due to the fact that a number of poorly delimited taxa still exist (Passos et al. 2018). The most frequent problem faced by taxonomist working with the genus Atractus is the lack of specimens available for several species, most of them only still being known from their types, a situation that considerably weakens the definition of species boundaries between closely related taxa (Passos et al. 2010a, 2013). More importantly, many of the previously recognized species may represent aberrant individuals with unusual or abnormal scale counts, anomalous azygous or fused cephalic plates, infrequent polychromatic patterns, or any combination of these states (see Passos et al. 2016b). In the course of a thorough taxonomic review of the genus (Passos 2008; Passos et al. 2018), an effort has been made to examine all of the available types (including those apparently lost or misplaced in collections) and material of historical importance that was previously referred to the genus in the literature, and these were then compared to newer samples collected more recently. During the examination of the collections of the Natural History Museum of London and the Museo Civico di Storia Naturale of Genova, we found important specimens of Atractus from Bolivia. However, in order to better understand all the problems related to these old and "forgotten" Bolivian snakes, we need to examine their history.

Molecular phylogeny of Maldanidae (Annelida): Multiple losses of tube-capping plates and evolutionary shifts in habitat depth

Inter-familial relationships of the phylum Annelida have been widely studied using molecular phylogenetic/genomic approaches; however, intra-familial relationships remain scarcely investigated in most annelid families. The Maldanidae (bamboo worms) comprise more than 280 species of 40 genera and six subfamilies that occur in various environments from intertidal to hadal zones. Within this family, the taxon Maldanoplaca, which consists of four subfamilies (Maldaninae, Notoproctinae, Nicomachinae, and Euclymeninae), was proposed based on the presence of cephalic and anal plates. Phylogenetic relationships within the family remain largely undetermined based on molecular data. In this study, we reconstructed a molecular phylogeny using 52 maldanid species from six subfamilies based on two nuclear genes (18S rDNA and 28S rDNA) and two mitochondrial genes (16S rDNA and COI). Our analysis confirmed the monophyly of the subfamilies Rhodininae, Maldaninae, Lumbriclymeninae, and Nicomachinae, but neither Maldanoplaca nor the subfamily Euclymeninae were recovered as monophyletic. Nicomachinae was clustered within Euclymeninae. Ancestral state reconstruction suggested that cephalic plates were lost at least three times, despite the functional importance of capping tubes, and that anal plates were lost once. Mapping habitat depth on the phylogenetic tree suggested that habitat shifts among depth zones frequently occurred in distinct maldanid lineages.

Morphological Re-Description and 18 S rDNA Sequence Confirmation of the Pinworm Aspiculuris tetraptera (Nematoda, Heteroxynematidae) Infecting the Laboratory Mice Mus musculus.

Aspiculuris tetraptera is a heteroxynematid nematoda infecting most of the laboratory animals, occasionally mice which represent the mostly used animal for biological, medical, and pharmacological studies. The present study aimed to investigate the prevalence of nematode parasites infection in the laboratory mice Mus musculus in Egypt. Morphologically, this oxyurid possessed four distinct cephalic papillae on a cephalic plate, with three small rudimental lips carrying two sessile poorly developed labial papillae and one pair of amphidial pores. Esophagus divided into cylindrical corpus and globular bulb. Distinct cervical alae interrupted at the level of esophago-intestinal junction forming an acute angle. At the caudal end, twelve caudal papillae in male worms while an ovijector apparatus opening and a vulva surrounded by protruded lips in females were observed. The general morphological criteria include this nematode with other Aspiculuris species which were compared in the present study. Molecular characterization based on 18SSU rDNA sequencing performed to confirm the taxonomic position of this species and to documents the morphological data. Sequence alignment detects a percent of identity up to 88.0% with other Heteroxynematidae species. Phylogenetic analysis showed that the present recorded is a putative sister taxon to A. tetraptera recorded in a previous study. The SSU rDNA sequence has been deposited in the GenBank under the accession no. MG019400.