Pairs Of Ventral Setae Research Articles

Arrhenoseius Walter & Lindquist (Mesostigmata: Blattisociidae): newly recorded from the Oriental Realm with description of two new species from China

ABSTRACT The genus Arrhenoseius Walter & Lindquist, 2000 is recorded for the first time from the Oriental Realm on the basis of two new species. Arrhenoseius hallidayi sp. nov. can be distinguished from other species of the genus by the ventrianal shield bearing five pairs of ventral setae and unsclerotised ventro-lateral cuticle without setae in the adult female, and Arrhenoseius granulatus sp. nov. can be distinguished by the ventrianal shield bearing eight pairs of ventral setae and unsclerotised lateral cuticle with six pairs of setae. A key to species of Arrhenoseius is given based on the adult females. http://www.zoobank.org/urn:lsid:zoobank.org:pub:086088AD-68A2-4464-BF8E-F113E5721FD0

Morphological changes in Neoseiulus californicus (Acari: Phytoseiidae).

This paper deals with the detailed morphological observation of larva, protonymph and deutonymph, as well as female and male adults of Neoseiulus californicus (McGregor) based on laboratory reared specimens. The main changes are as follows: larva with one dorsal shield, while protonymph with two, which fused into a holodorsal shield in deutonymph; 9 pairs of dorsal setae in larvae, 14 pairs in protonymph, and 19 pairs in deutonymph and adult; the immature stages without discernible ventrianal shield, though hypoplastic shield, a weakly sclerotized small plate around the anal pore, present in the protonymph and deutonymph. larva and protonymph each with seven pairs of ventral setae, while deutonymph and adult each with 12 pairs; movable digit with one or two teeth in larva, three teeth in protonymph, deutonymph or adult. The development of morphological traits in ontogenesis of N. californicus could provide helpful basis to identify it practically from its relatives.

Description of the puparium and adult genitalia of Dactylodeictes brevifacies James, 1974 (Diptera: Stratiomyidae)

The puparium of Dactylodeictes brevifacies was described based on fifty-eight specimens reared in laboratory until the emergence of adults. Larvae were collected under the bark of fallen trees in a Cerrado vegetation, Gallery forest; Palm swamp (Vereda) and open grassland (Campo Limpo) in States of Goiás and Tocantins, Brazil (New Record). The puparium was compared with that of Brachyodina lopesi, the most closely related species with a described puparium. Despite this species clearly shared the larval pachygastrinae features it has a remarkable character not know before for this subfamily: the presence of four pairs of ventral setae (V) in the eighth abdominal segment in ventral view, while in other larvae and puparia of this subfamily, there are five pairs of ventral setae. The adult male and female were described and figured.

New records and phylogenetic position of Ornithodoros knoxjonesi (Ixodida: Argasidae)

Larvae of Ornithodoros knoxjonesi collected at five localities in three countries were studied using morphological and molecular methods to confirm this species’ taxonomic validity. The larva of O. knoxjonesi is characterized as having 14 pairs of dorsal setae, eight pairs of ventral setae, plus a posteromedian seta; an elongate dorsal plate, tapered anteriorly; and a hypostome that is narrower near its midlength, with posteriorly projecting denticles. Although the larvae of O. knoxjonesi and Ornithodoros peropteryx are morphologically quite similar, the larva of O. knoxjonesi is characterized as having dorsal setae that are wider at the tip than at the base, while in O. peropteryx these setae are narrower at the tip than at the base; moreover, the dorsal setae are shorter in O. knoxjonesi (Al 0.037–0.065; Pl 0.035–0.059) than in O. peropteryx (Al 0.120−0.132; Pl 0.080−0.096). These species also differ in that O. knoxjonesi possesses only the Al seta on tarsus I, whereas O. peropteryx has both Al and Pl setae. And while both species have two setae on coxae I-III, in O. knoxjonesi the anterior seta is tapering and smooth and the posterior is fringed, while both setae are fringed in O. peropteryx. At the molecular level, based on a maximum likelihood analysis using approximately 400 bp of the mitochondrial 16S rDNA gene, O. knoxjonesi appears as an independent lineage, separated from O. peropteryx by a genetic distance of 16.28 %. Balantiopteryx plicata is a common host of O. knoxjonesi; however, in this work we report Pteronotus personatus and Pteronotus gymnonotus as new hosts of this tick species.

A New Species of Antennoseius from Australia (Acari: Mesostigmata: Ascidae)

Abstract. Antennoseius (Vitzthumia) ventrianalis sp. nov. is the second species of Antennoseius described from Australia (Acari: Ascidae). It is described from non-phoretic specimens collected from the soil surface. The new species is unique in having three pairs of ventral setae on the ventri-anal shield; the maximum observed in other species is two pairs. It is sexually dimorphic in the degree of fusion of the podonotal and opisthonotal shields and some other minor characters.

First time discovery of Loricifera from Australian waters and marine caves

Two new species of Loricifera, Pliciloricus cavernicola sp. nov. and Australoricus oculatus gen. nov. et sp. nov., have been found in two submarine caves, Jim's Cave and Fish Rock Cave, off the coast of New South Wales, Australia. This is the first discovery of Loricifera from Australia and additionally from marine caves. This paper is the third paper concerning the meiofauna animals from the two caves. Pliciloricus cavernicola sp. nov. is characterized by an adult having a large tripartite mouth cone with six oral stylets; clavoscalids with fine lines; a short, robust double organ; small leg-shaped scalids with three stiff hairs; simple claw-shaped scalids; reduction of trichoscalid basal plates in the first two rows and a midventral plica with three ridges. Australoricus oculatus gen. nov. et sp. nov. is characterized by a Higgins-larva having a pair of pigmented eyes; the 2nd scalid row missing; six smooth and long filiform scalids in the 6th row; six rectangular plates with two teeth in the 7th row; three pairs of ventral setae; two large lateral lorica plates; three pairs of posterior setae and toes with balloon-shaped mucrones.

Argas (Persicargas) keiransi n. sp. (Acari: Argasidae), a parasite of the Chimango, Milvago c. chimango (Aves: Falconiformes) in Chile.

The larva of Argas (Persicargas) keiransi Estrada-Peña, Venzal & González-Acuña n. sp. is described from specimens collected on the neck of a chimango, Milvago c. chimango (Aves: Falconiformes) in the Chillán, Chile, in the Sub-Antarctic biogeographical region. The larva of the new species shares the tarsus I setal formula with A. (P.) giganteus, these being the only two Persicargas species with three pairs of ventral setae plus both av4 and pv4 setae. However, it is unique in having a dorsal plate "V" or "U" shaped, with the anterior end open, without the typical reticulated pattern present in the remaining species of the genus.

A New Ectoparasitic Laelaptid Mite from Africa

Laelaps nigeriensis sp. n. from Nigeria is described. Type material was taken from Crocidura sp. and from Mus (Leggada) musculoides at Adu, Nigeria. The species is distinctive in lacking spurlike setae on coxae I, and in that the inner members of the paired hypostomal setae extend posteriorly to level of insertion of gnathosomal setae. The species description given in this paper is based upon specimens collected by the late Dr. A. S. Pearse in Nigeria in 1926. These specimens, and others taken from rodents and insectivores by Dr. Pearse, were forwarded to the United States National Museum and later referred to the writer for study. Subfamily Laelaptinae Berlese, 1892 Laelaps Koch, 1839 Laelaps nigeriensis sp. n. (figs. 1, 2) Female: Terminal setae of dorsal shield over twice as long as subterminal setae. Presternal area not clearly distinct from sternal shield. Anterior sternal shield shortest; anterior pores parallel with anterior margin of shield, but posterior pores set at an angle; length-width ratio of shield about 3:4. Endopodal setae at least as long as posterior sternal setae. Genitoventral shield slightly expanded posterior to coxae IV; its posterior margin very slightly rounded between posterior genitoventral setae; anterior genitoventral setae largest and slightly farther apart than anterior sternal setae; posterior genitoventral setae slightly farther apart than those of anterior pair. Anterior margin of anal shield slightly concave; anus slightly closer to anterior margin of shield than to postanal seta; paired anal setae at level of posterior end of anus; length-width ratio of shield 1:1; cribrum very narrow. Metapodal shields irregular ovals. Nine or ten pairs of ventral setae; peritreme extends to level of coxa I. Chelae not distinct; it cannot be determined whether the pilus is inflated; inner paired hypostomal setae at least four times as long as outer setae and extending posteriorly to level of point of insertion of gnathosomal setae. Lengthwidth ratio of tarsus I 2.5:1; femora I and II with elongate dorsal setae, which are smaller than most setae on dorsal shield; coxae I and IV without spurlike setae; coxae II and III each with one Received for publication 26 September 1961. * Lt. Colonel Keegan is assigned to the Entomology Branch, Department of Preventive Medicine, Medical Field Service School, Brooke Army Medical Center, Fort Sam Houston, Texas. spurlike seta. Idiosoma of holotype female 538 ,u in length and 370 tu in width; idiosoma of a paratype female, on same slide with holotype, 577 ,L long and 337 A wide. This specimen is less flattened than the holotype and is probably more representative of the normal size of the species. Male: Unknown. Type material: Holotype and paratype female, on same slide, taken from Crocidura sp. at Adu, Nigeria, 15 September 1926, by A. S. Pearse. One additional paratype, taken from Mus (Leggada) musculoides at Adu, Nigeria, by A. S. Pearse on 28 September 1926. Type material in United States National Museum. Discussion: Absence of spurlike setae on coxae I places Laelaps nigeriensis in a category with L. simillimus Zumpt, 1950; L. transvaalensis Zumpt, 1950; L. grenieri Taufflieb, 1954; L. keegani Thurman, 1958; and L. congoicola Taufflieb, 1959. Only in nigeriensis does the inner member of the paired hypostomal setae extend posteriorly to the level of insertion of the gnathostomal setae. The drawings were prepared by Mr. Saburo Shibata, Taxonomic Section, Department of Entomology, 406th Medical General Laboratory. Slide preparations of types were made by Miss Yoshiko Yoshida of the same laboratory.