Shrimp Genus Research Articles

Salmoneus durisi sp. nov., an infaunal alpheid shrimp probably associatedwith callianassid ghost shrimps in the tropical Indo-West Pacific(Malacostraca: Decapoda: Caridea).

A new species of the alpheid shrimp genus Salmoneus Holthuis, 1955, probably an obligate associate of ghost shrimp burrows, is described based on material from Oman (type locality: Darsait near Muscat), Iran and the Philippines. Salmoneus durisi sp. nov. is characterised principally by both chelipeds enlarged, robust, with ventral and dorsal margins of chelae carrying long fine setae, and with minor chela fingers armed with a few large teeth on cutting edges. All specimens of Salmoneus durisi sp. nov. were collected either directly from burrows of larger decapod crustaceans with the aid of a suction pump, or by exposing burrows dug under large subtidal rocks. The Iranian specimen was found together with its presumed host, Neocallichirus calmani (Nobili, 1904). Two additional specimens from Indonesia and the Solomon Islands are tentatively assigned to S. cf. durisi sp. nov., awaiting further studies.

The eastern Pacific species of Salmoneus Holthuis, 1955, with descriptionof a remarkable new species from Las Perlas Archipelago, Panama (Malacostraca: Decapoda: Alpheidae).

The present study deals with five species of the alpheid shrimp genus Salmoneus Holthuis, 1955 from the tropical eastern Pacific. One of them is new to science and is described as Salmoneus tiburon sp. nov. The new species is presently known only from the Las Perlas Archipelago in Panama and can be distinguished from all other congeners by the dentition on the cutting edges of the major chela, with some dactylar teeth reminiscent of shark teeth. It is also one of the largest species of the genus, with the carapace length of both type specimens surpassing 8.0 mm. Salmoneus serratidigitus (Coutière, 1897), a species with an ample distribution across the Indo-Pacific, is recorded for the first time from the Pacific coast of Panama and is confirmed from Colombia. Salmoneus malagensis Anker Lazarus, 2015, previously known only from Bahía Málaga in Colombia, is recorded from Panama's Azuero Peninsula. The remaining two species, S. excavatus Anker, 2011 and S. alvarezi Anker Lazarus, 2015, are recorded regionally from Las Perlas Archipelago in Panama and Playa Tarcoles in Costa Rica, both for the first time since their original descriptions. An identification key to the five currently known eastern Pacific species of Salmoneus is provided. However, several immature and/or incomplete specimens herein preliminarily reported as Salmoneus spp., as well photographic records from southern California, USA, indicate the presence of further undescribed species in the eastern Pacific.

A new species of alvinocaridid shrimp Rimicaris Williams & Rona, 1986 (Decapoda: Caridea) from hydrothermal vents on the Mariana Back Arc Spreading Center, northwestern Pacific

AbstractA new species of the alvinocaridid shrimp genus RimicarisWilliams & Rona, 1986, R. falkoraen. sp., is described and illustrated based on material from deep-sea hydrothermal vents (3,630–3,912 m deep) on the Mariana Back Arc Spreading Centre, northwestern Pacific, representing the tenth described species of the genus. The new species is morphologically most similar to R. paulexa (Martin & Shank, 2005), but the presence of numerous short setae scattered on the carapace surface, the relatively long antennular stylocerite usually reaching the distal margin of article 2 of the antennular peduncle and the spiniform posteromesial projection of the uropodal protopod distinguish the new species from all congeners. Genetic analysis using the barcoding region of the mitochondrial COI gene supports the recognition of the species as new.

Comparative analysis of the early larval stages of two marine shrimp genera Leander and Nematopalaemon (CARIDEA, PALAEMONIDAE) obtained in the laboratory

ABSTRACTThe first and second zoeal stages of Leander paulensis and Nematopalaemon schmitti are described and illustrated from laboratory-reared material. These descriptions constitute the first larval description for both species. Larvae were obtained from females with embryos collected in tropical locations of Brazil’s southeast coast (L. paulensis at Cananéia, São Paulo state, and N. schmitti at Macaé, Rio de Janeiro state). The morphology of newly hatched larva is compared with previous descriptions of congeners (L. tenuicornis and N. tenuipes). Obvious similarities were observed between the genera (carapace spines; peduncle and flagella of antenulle; flagellum of antenna; endopods of maxilla; pereiopods; and telson formula). However, a considerable number of morphological differences are pointed to distinguish these two genera, and even the species into them. The information provided here will help the identification of these species in plankton samples and can be used in future studies of life histories and phylogenetic relationships at different taxonomic levels.

A new freshwater shrimp species of the genus Palaemon Weber, 1795 (Decapoda: Caridea: Palaemonidae) from northeastern Japan.

The palaemonid shrimp genus Palaemon Weber 1795 is currently represented by 87 species worldwide, of which 36 species inhabit freshwater environments. In this study, we describe a new species of the genus, P. septemtrionalis, primarily based on material collected from rivers in Miyagi Prefecture, Tohoku District, northeastern Japan. The present new species is morphologically and genetically close to Palaemon paucidens De Haan, 1841, but it is morphologically distinguishable from the latter by the chela of the pereopod 2 being longer than the carpus (versus shorter than the carpus in P. paucidens) and the possession of a low, laminar convexity on the flexor margin of the pereopod 3 dactylus just proximal to the base of the unguis (such a laminar structure is absent in P. paucidens). Comparison of partial sequences of the mitochondrial 16S rRNA gene supports the recognition of the new species. Examination of museum collections and a BLAST search on GenBank revealed that the geographical range of the new species includes the Sea of Japan side ranging from Hokkaido to Hyogo Prefecture and the Pacific side ranging from Aomori to Miyagi Prefecture. An identification key to the 13 Japanese species of the genus is presented.

First record of the callianassid ghost shrimp Neocallichirus jousseaumei (Nobili, 1904) (Decapoda: Axiidea) from India

From India, two species of the callianassid ghost shrimp genus Neocallichirus Sakai, 1988 are known. In this study, Neocallichirus jousseaumei (Nobili, 1904) is first recorded from India based on a single specimen collected from intertidal zone of Diu coast. A brief description for giving evidence of the identification and notes on habitat is presented.

Two new species of Hippolyte from the Tropical Central and East Atlantic(Crustacea, Decapoda, Caridea).

Two new species of the caridean shrimp genus Hippolyte Leach, 1814 [in Leach, 1813-14] are described from the Tropical Central and East Atlantic. Hippolyte cedrici sp. nov., from Príncipe and São Tomé, can be distinguished from both the related H. holthuisi Zariquey Álvarez, 1953 and H. varians Leach, 1814 on the basis of rostral dentition, as well as meristics of the ambulatory pereiopods. Hippolyte karenae sp. nov., from St. Helena, is morphologically similar to H. coerulescens (Fabricius, 1775) and H. obliquimanus Dana, 1852, by having a well-developed tooth on the outer angle of the first peduncular article of the antennula. It differs from these species, amongst other characters, primarily in the armature of the ambulatory dactyli. Specimens were collected from hydrozoan, antipatharian and alcyonarian cnidarians.

Occurrence of a tumour-like abnormality in the telson skeleton of the brine shrimp Artemia (Branchiopoda, Anostraca)

Abstract Malformations of crustaceans have been observed in their natural habitats as well as in laboratory studies. Two patterns of morphological abnormalities have been recorded in species of the brine shrimp genus Artemia, including a gynandromorphic pattern and a specimen with three compound eyes. Here we report a hitherto unknown pattern of morphological deformation, viz., a tumour-like abnormality that occurred in the telson skeleton of a specimen of Artemia from China.

Three new species of the pandalid shrimp genus Pandalopsis Spence Bate, 1888 (Crustacea: Decapoda: Caridea) from the southwestern Sea of Okhotsk, with supplemental note on P. glabra Kobjakova, 1936.

The present study deals with a collection of deep-sea shrimp of the pandalid genus Pandalopsis Spence Bate, 1888 from the Nemuro Strait, Hokkaido, southwestern part of the Sea of Okhotsk. Three new species are described and illustrated: Pandalopsis capillus n. sp., P. houyuu n. sp. and P. princeps n. sp. In addition, Pandalopsis glabra Kobjakova, 1936, a species endemic to the Sea of Okhotsk, is supplementary reported. Most specimens were collected from steep slopes or hard bottoms at depths greater than 400 m by commercial shrimp trap or gill nets operated by local fishermen. Differentiation of the new species is primarily based on a morphological comparison, supplemented by a preliminary genetic analysis of partial segments of the mitochondrial 16S rRNA gene. An identification key to the species of Pandalopsis is presented.

The complete mitochondrial genome of Alpheus hoplocheles (Decapoda: Alpheidae)

The snapping shrimp genus Alpheus is the most diverse and abundant genus of Caridea. However, the phylogenetic and taxonomic studies have so far been limited. In this study, we report the third complete mitochondrial genome of Alpheus from A. hoplocheles. The mitogenome has 15,735 base pairs (60.2% A + T content) and made up of a total of 37 genes (13 protein-coding, 22 transfer RNAs and 2 ribosomal RNAs), and a control region. This study was the third available complete mitogenomes of Alpheidae and will provide useful genetic information for future phylogenetic and taxonomic classification of Alpheidae.

A new species of the ghost shrimp genus Neocallichirus Sakai, 1988 from Iran, and new record of N. manningi Kazmi Kazmi, 1992 (Decapoda: Axiidea: Callianassidae).

Two species of the callianassid ghost shrimp genus Neocallichirus Sakai, 1988 are newly recorded from Iran. Neocallichirus darvishi n. sp. appears close to N. jousseaumei (Nobili, 1904), but combined morphological and genetic analyses provide evidence for recognition of the new taxon. Neocallichirus manningi Kazmi Kazmi, 1992, originally described from Pakistan, is reported for the first time since its original description. A supplemental description and figures are given for N. manningi.

飼育個体から得たモロトゲエビ属2種（コエビ下目：タラバエビ科）のポストラーバの種判別形質

飼育個体から得たモロトゲエビ属2種（コエビ下目：タラバエビ科）のポストラーバの種判別形質

Publisher's note

Abstract Non-marine Cretaceous red beds are widely distributed in south-east China. Clam shrimps are one of the most useful fossil groups for biostratigraphic correlation of these strata. The fossil clam shrimp genus Linhaiella Chen and Shen, 1982 was originally described from a sequence of the Upper Cretaceous red beds, which belongs to the Fangyan Formation in the Xianju Basin of Zhejiang Province, south-east China. Morphological study of Linhaiella from Zhejiang under an SEM has revealed new taxonomic features not previously recognized: (1) growth bands near umbo ornamented by slender radial lirae that are relatively widely spaced with intercalated fine reticulations; (2) growth bands in the middle to ventral parts of the carapace ornamented with no reticulation, but a row of pits along the lower margin of each growth band.

A new species of the stenopodidean shrimp genus Odontozona Holthuis, 1946 (Crustacea: Decapoda: Stenopodidea: Stenopodidae) from the Ryukyu Islands, Indo-West Pacific.

A new species of the stenopodidean shrimp genus Odontozona Holthuis, 1946 is described and illustrated on the basis of 3 specimens recently collected from submarine caves of Okinawa-jima and Ie-jima Islands, the Ryukyu Islands, southwestern Japan, Indo-West Pacific. Odontozona okunoi sp. nov. closely resembles O. anaphorae Manning Chace, 1990 described from Ascension Island, South Atlantic Ocean, but differs from it by a combination of morphological characters, including the large cardiac spine on the carapace, the spines on the pleural surface, the posterior tooth of the telson, the irregular row of small spines on the dorsomesial surface of the third pereopod chela, as well as the length ratio of the third pereopod chela against carpus and merus. This study increases the total number of species described in the genus Odontozona to 21, nine of which occur the Indo-West Pacific.

Notes on the shrimp genus Palaemon Weber, 1795 (Crustacea, Decapoda,Palaemonidae) and related genera from Taiwan.

The shrimp genus Palaemon Weber, 1795 and its related genera in Taiwan are reviewed based on newly collected specimens, whilst older records are critically reviewed. Five genera and 11 species are now known to occur in Taiwan, although there are no recent records for Palaemon modestus (Heller, 1862), which could be nationally extinct. The records of P. debilis Dana, 1852 and Nematopalaemon tenuipes (Henderson, 1893) in Taiwan are confirmed. Three genera, namely Brachycarpus Spence Bate, 1888, Leander Desmarest, 1849 and Leandrites Holthuis, 1950, each with one species are reported for the first time from Taiwan.

Analysis of the scientific research structure regarding the genus Macrobrachium (Decapoda: Caridea: Palaemonidae) between 1980 to 2016 based on the Web of Science

The freshwater shrimp genus Macrobrachium is highly diverse, distributed in tropical and subtropical regions around the world, and of considerable commercial importance in many countries. Here we present the results of an analysis of the scientific production regarding Macrobrachium published between 1980 and 2016 in the database Web of Science. The evaluated indicators were key words and authors producing the scientific literature about this genus. Concept maps and cluster analysis techniques were used to display the relationships between them. The results of the study visualize the temporal development of scientific knowledge of the genus Macrobrachium and describe the development of authorship networks during 36 years study period. Moreover, the results of the analysis show emerging research trends in the field of Macrobrachium studies.

A new species of Eupasiphae Wood-Mason Alcock, 1893 (Crustacea, Decapoda, Pasiphaeidae) from the southwestern Atlantic.

The pasiphaeid shrimp genus Eupasiphae Wood-Mason Alcock, 1893 (Caridea: Pasiphaeidae) currently includes four bathypelagic species: Eupasiphae latirostris (Wood-Mason, 1891), E. gilesii (Wood-Mason, 1892), E. serrata Rathbun, 1902 and E. paucidentata Crosnier, 1988. The present work describes a further new species, Eupasiphae ostrovski n. sp., on the basis of material sampled at the continental shelf and slope of the Central Brazilian coast at depths of 200 - 2000 m. The new species is somewhat similar to E. paucidentata, only known from Madagascar, but can be easily distinguished from all other congeneric species by the number and shape of lateral carinae at carapace and by the middorsal carina of the carapace being without teeth anteriorly and with 0-3 posteriorly. The new species is the first Eupasiphae representative known from the southwestern Atlantic.

Cryptic diversity of stygobiotic shrimp genus Xiphocaridinella Sadowsky, 1930 (Crustacea: Decapoda: Atyidae): the first case of species co-occurrence in the same cave system in the Western Caucasus.

DNA barcoding of stygobiotic shrimps of the genus Xiphocaridinella Sadowsky, 1930 (Crustacea: Decapoda: Atyidae) collected in underground streams flowing inside two neighboring large karst caves (Otap and Abrskil сaves) revealed the presence of two distinct genetic lineages representing the first case of species co-occurrence in the Western Caucasus. The paper presents the complete morphological re-description of stygobiotic atyid shrimp Xiphocaridinella ablaskiri (Birštein, 1939) and the description of a new species using genetic and morphological analysis. Other known cases of co-occurrence of several stygobiotic shrimp species in the same cave system as well as new genetic data (COI mtDNA) on Western Caucasian species of the genus Xiphocaridinella are discussed in the paper.

A new deep-sea species of the snapping shrimp genus Alpheus Fabricius, 1798 (Decapoda: Caridea: Alpheidae) from Kagoshima Bay, Japan.

A new species of the snapping shrimp genus Alpheus Fabricius, 1798, A. longipalma, is described and illustrated on the basis of material from Kagoshima Bay, Kyushu, Japan. It is referred to the A. brevirostris (Olivier, 1811) species group, and appears closest to A. macroskeles Alcock Anderson, 1894, known with certainty from the Bay of Bengal and Andaman Sea, and A. talismani Coutière, 1898 from the eastern Atlantic. The greatly elongate minor cheliped in males, being subequal to or longer than the major cheliped with proportionally shorter dactylus distinguish the new species from A. macroskeles. The less elongate antennular peduncle and better-developed, rounded distal lamella of the antennal scaphocerite differentiate the new species from A. talismani. All specimens of the new species were trawled from depths greater than 200 m.

A new, distinctly coloured species of Lysmata Risso, 1816 (Malacostraca: Decapoda: Lysmatidae) from the south-central Atlantic.

A new species of the caridean shrimp genus Lysmata Risso, 1816 is described from St. Helena and Ascension Island in the south-central Atlantic. Lysmata napoleoni sp. nov. is part of the so-called "long-branch group" of the genus and shows a strong morphological similarity with the eastern Atlantic L. seticaudata Risso, 1816, from which it can be distinguished by details of the accessory branch of the antennular flagellum. The new species also displays a unique and bright colour pattern and therefore can be easily recognised in the field. Furthermore, it is typically found in proximity of sea anemones, Telmatactis cricoides (Duchassaing), and appears to be an occasional fish cleaner.