Crinoid-associated shrimps of the genus Laomenes A.H. Clark, 1919 (Caridea: Palaemonidae: Pontoniinae): new species and probable diversity

Zootaxa ◽  
2009 ◽  
Vol 1971 (1) ◽  
pp. 1-49 ◽  
Author(s):  
IVAN MARIN

Three new species of the genus Laomenes A.H. Clark are described as symbionts of feather stars (Crinoidea: Comatulida) from shallow waters of Nhatrang Bay, Vietnam. Including these new species, the genus comprises 8 species and can be arranged into 3 suggested groups of species. The “L. amboinensis” species group with 4 species, L. amboinensis (De Man, 1888), L. cornutus (Borradaile, 1915), L. clarki sp. nov. and L. pardus sp. nov., characterized by the presence of ventral rostral teeth, distoventral spines on propodus of pereiopod III and a fixed tooth on distolateral margin of uropodal exopod. The “L. jackhintoni” species group includes 2 species, L. jackhintoni (Bruce, 2006) and Laomenes tigris sp. nov., characterized by the absence of ventral rostral teeth, extremely elongated apical papilla on cornea of eyes, the presence of fixed tooth on exopod of uropod, the absence of distoventral spines on propodus and the presence of large accessory tooth on dactylus of pereiopod III. The “L. ceratophthalmus” species group includes 2 species, L. ceratophthalmus (Borradaile, 1915) and L. nudirostris (Bruce, 1968), characterized by the absence of ventral rostral teeth and distoventral spines on propodus of pereiopod III, the presence of small accessory tooth on dactylus of pereiopod III, tiny marginal dorsal spines on telson and the absence of a fixed distolateral tooth on exopod of uropod. Remarks and a key for all species of the genus as well as a discussion of the undescribed diversity of the genus are given.

2018 ◽  
Vol 58 (2) ◽  
pp. 577-587
Author(s):  
Vladimir Kaplin

Abstract The fauna of bristletails of the genus Lepismachilis Verhoeff, 1910 in Montenegro and Serbia includes only one species L. (Berlesilis) targionii (Grassi, 1887) with 2 + 2 eversible vesicles on abdominal urocoxites II–VI. Three new species of this genus are described: L. (Lepismachilis) prijepolja sp. nov., L. (Lepismachilis) limensa sp. nov. from Serbia, and L. (Lepismachilis) alexandrae sp. nov. from Montenegro. All described new species belong to the species group of the subgenus Lepismachilis s. str. with 2 + 2 eversible vesicles on abdominal urocoxites II–V. Lepismachilis prijepolja sp. nov. differs from L. y-signata Kratochvíl, 1945 and L. notata Stach, 1919 by the color, drawings and ratios of the compound eyes; ratios of sensory field on fore femur of male, number of divisions of ovipositor. Lepismachilis limensa sp. nov. differs from L. hauseri Bitsch, 1974 and L. abchasica Kaplin, 2017 by ratios of paired ocelli, sensory field on fore femur of male; ratios and chaetotaxy of maxillary and labial palps. Lepismachilis alexandrae sp. nov. differs from L. abchasica by the drawings of the compound eyes; ratios of paired ocelli, sensory field on fore femur of male; number of divisions of the parameres and gonapophyses. A list of the Machilidae occurring in Balkan Peninsula is also provided.


Zootaxa ◽  
2021 ◽  
Vol 5061 (2) ◽  
pp. 340-352
Author(s):  
MARCOS FIANCO ◽  
OSCAR J. CADENA-CASTAÑEDA ◽  
NEUCIR SZINWELSKI ◽  
LUIZ R. R. FARIA

Three new species of Anaulacomera are described, Anaulacomera (Anaulacomera) mariellae sp. n. and Anaulacomera (Anallomes) arlindoi sp. n., belonging respectively to the Inermis and Lanceolata species group, and Anaulacomera angelinae sp. n., placed as incertae sedis. The individuals were collected at the Iguaçu National Park and adjacent small fragments of Atlantic Forest, in southwestern Paraná state, Brazil. The description was based on external morphology of males. We also present distribution maps for the species of the Inermis and the Lanceolata species groups.  


1972 ◽  
Vol 21 (0) ◽  
pp. 01-13 ◽  
Author(s):  
Pierre Ch. Montouchet

A consultation of the original descriptions of the genera of Scissurellidae led the author to conclude that the valid names for the genera of this family are: Scissurella d'Orbigny, 1823 (redescription by Sowerby, 1824), Anatoma Woodward, 1859, Inoisura Hedley, 1904, Scissurona Iredale, 1924, Sinezona Finlay, 1927. Scissurella and Anatoma are cosmopolites, the first generally living in shallow waters, associated to sea-weeds, while the second is found in deep waters. The three last genera are restricted to Australasia. Three new species are described from the Brazilian coast: Soissu rella alexandrei, Scissurella eleotilis and Scissurella morretesi. The internal anatomy of S. alexandrei is described. These three new species have been found in littoral shallow waters, the two first on the northeast Brazilian coast, the third on the coast of the State of São Paulo. The fourth known species of Scissurellidae from Brazil, Anatoma aedonia (Watson, 1886), was dredged by H.M.S, "Challenger", in 1873, off Pernambuco, 350 fm (640 m).


ZooKeys ◽  
2020 ◽  
Vol 944 ◽  
pp. 1-30
Author(s):  
Seong Yong Moon ◽  
Ho Young Soh ◽  
Dae Hyun Cho

During general field surveys carried out recently to collect benthopelagic copepods from near the substrate of the shallow waters off Jeju Island, Korea, a few specimens of three new species of Stephos Scott, 1892, were collected. The new species are placed in the genus Stephos because of the following combination of features: absence of seta on the basal exite of maxillule, and male right leg 5 ending in an unarmed claw-like and/or mitten-like segment. Stephos jejuensissp. nov. can be distinguished from its congeners by body length 0.92 mm, left side of the female genital double-somite with protruding lobes, antennule that extends beyond the distal area of the genital double-somite, and the male leg 5 terminal complex. Stephos concavussp. nov. can be distinguished from its congeners by the genital double-somite with protruding lobes on both sides, and the presence of larger spinules on the distomedial margin of leg 5. Stephos fortipessp. nov. can be distinguished from its congeners by its longer body length, 1.12 mm long in the female, antennules that extend to the end of the genital double-somite, and the presence of a covered row of minute spinules on the ventral surface of the genital operculum in the female. Until now, 35 species of stephids were known worldwide.


ZooKeys ◽  
2019 ◽  
Vol 880 ◽  
pp. 113-133
Author(s):  
Rodrigo de Vilhena Perez Dios ◽  
Marcelo Domingos de Santis

The monotypic tachinid genus Opsozelia Townsend, 1919 (Diptera: Tachinidae) is synonymized with ZeliaRobineau-Desvoidy 1830, syn. nov. The single species of Opsozelia, O. discalis Townsend, 1919, is redescribed as Zelia discalis, comb. nov., based on examination of the holotype from Guyana and additional material from Suriname, Brazil and Paraguay. Three new species of Zelia similar to Z. discalis are described from Brazil: Z. magnasp. nov., Z. guimaraesisp. nov. and Z. formosasp. nov. These four species are treated informally as the Zelia discalis species group. An identification key to the species of this species group is provided based on male specimens. Descriptions and illustrations are provided for the male terminalia of all species and for the female terminalia of one species, Z. guimaraesi.


Author(s):  
Amir Dehghani ◽  
Alireza Sari ◽  
Reza Naderloo

AbstractThree new species of snapping shrimps of the genusAlpheusare described from the Persian Gulf. These belong to theAlpheus edwardsiispecies-group, which is mainly characterized by unarmed orbital hoods and the presence of dorsal and ventral notches on the palm of the major chela.Alphus ankerisp. nov. shows a close affinity toA. pacificusDana, 1852 andA. heronicusBanner & Banner, 1982 bearing no balaeniceps crests in both sexes on the dactylus of the minor chela, and the merus of the major chela of both sexes are unarmed. This species differs from the closely related species by the absence of an overhanging proximal shoulder in the major chela. The other rock crevice inhabiting species,A. mohammadpourisp. nov. is diagnosed by exhibiting sexual dimorphism in its balaeniceps crests and the armed merus of the major chela. These two characters are similar to those recorded for three sandy/rubble dwelling species:A. inopinatusHolthuis & Gottlieb, 1958,A. lobidensDe Haan, 1849 andA. australiensisBanner & Banner, 1982. This new species is distinguishable from these latter species by the shape of the minor chela and colour pattern. A coral inhabiting speciesA. abumusasp. nov. appears to be closely related toA. maindroniCoutière, 1898, showing an armed merus of the major chela and the absence of spine-like seta on the ischia of the third legs. This last new species is easily discriminated fromA. maindroniby longer antennular segments, a markedly concave frontal margin between the rostrum and orbital hood, and a different colour pattern.


Zootaxa ◽  
2021 ◽  
Vol 5071 (2) ◽  
pp. 289-295
Author(s):  
ALFONSO NERI GARCÍA ALDRETE ◽  
JOSÉ ARTURO CASASOLA-GONZÁLEZ

Three species of Lachesilla, in species group rufa, from the Sierra Tarahumara, Chihuahua, Mexico, are here described and illustrated: L. byei n. sp., L. furthi n. sp., and L. raramuri n. sp. Two of them belong in Subgroup IIb of the species group, one showing affinities with L. sommermanae García Aldrete and L. yakima Mockford & García Aldrete, the second one showing affinity with L. salamana García Aldrete. The third species belongs in Subgroup I of the species group, showing affinities with L. aspera García Aldrete and L. chiricahua García Aldrete. The especies here described raise to seven the number of species of Lachesilla in the Sierra Tarahumara.  


Zootaxa ◽  
2021 ◽  
Vol 4920 (2) ◽  
pp. 254-266
Author(s):  
M. SENRAJ ◽  
S. MARIA PACKIAM ◽  
S. PRABAKARAN ◽  
CRISTIAN C. LUCANAS ◽  
DEEPA JAISWAL

The known species of Allacta Saussure & Zehntner, 1895 in India are reviewed. Three new species, A. jcenpro sp. nov., A. vellimalai sp. nov., and A. kollimalai sp. nov., are described. All are placed under hamifera species group. The new species can be differentiated from other members of hamifera species group by the pronotal and facial markings, the structure of the male genitalia and other morphological characters. Additional reports to A. kalakadensis Prabakaran & Senraj 2019 and A. figurata (Walker, 1871) are provided. A key to the known species of Indian Allacta is provided. 


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