Euryrhynchoides Powell 1976
Creators
Description
Genus Euryrhynchoides Powell, 1976
Euryrhynchoides Powell, 1976: 885. Gender masculine.
Euryrhynchoides — Powell 1977: 650; Holthuis 1993: 184; Pereira 1997: 3, tab. 5; De Grave 2007: 193; De Grave et al. 2008: 291; De Grave et al. 2009: 17; De Grave & Fransen 2011: 309; De Grave et al. 2015: 4; De Grave et al. 2017: 120.
Recognition characters. Rostrum with 2–3 teeth on dorsal margin, ventral margin smooth, non-dentate. Distomesial region of ocular peduncles not produced anteriorly, not reaching distal margin of cornea. Distolateral margin of stylocerite with cluster of simple setae. Accessory ramus of antennule with aesthetacs distributed on distal 3 articles. Third maxilliped with 2 arthrobranchs. Third and fourth pereopod carpus with cuspidate seta on distoventral margin. Third to fifth pereopod dactylus with cuspidate setae on dorsal margin. Male second pleopod with endopod not spatulate, modified into gonopod with accessory branch; appendices masculina and interna lacking. Uropodal exopod with more than 3 cuspidate setae on diaeresis, decreasing in size towards lateral margin.
Type species. Euryrhynchoides holthuisi Powell, 1976, by monotypy.
Species included. Genus monotypic.
Distribution. Sierra Leone (Moyamba district) and Nigeria (Rivers State) (Powell 1976; Nwadiaro 1984) (Figs. 2, 62, blue circles).
Remarks. The genus includes the largest representatives of the family, with adult specimens up to 10.3 mm of carapace length (based on the examined specimens). Euryrhynchoides is unique within the family in having a dorsally dentate rostrum, the aesthetascs of the accessory ramus of antennule present on the distal and antepenultimate articles, and the second male pleopod with a biramous gonopod, but lacking an appendix interna (Powell 1976: fig. 1B, F; Fig. 5 A, D, E). Euryrhynchoides shares with Euryrhynchus the distomesial region of the ocular peduncles not anteriorly produced, the stylocerite with a cluster of setae on the distolateral margin, the presence of arthrobranch on the third maxilliped, the second male pleopod with a gonopod, and the uropodal diaeresis with more than 3 cuspidate setae (Powell 1976: figs. 1C, D, 2H, 4B–D; see also Figs. 9 A, 11D, E, G, 13B, 17B–E).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Euryrhynchidae
- Genus
- Euryrhynchoides
- Kingdom
- Animalia
- Order
- Decapoda
- Phylum
- Arthropoda
- Scientific name authorship
- Powell
- Species
- holthuisi
- Taxon rank
- genus
- Taxonomic concept label
- Euryrhynchoides Powell, 1976 sec. Pachelle & Tavares, 2018
References
- Powell, C. B. (1976) Two new freshwater shrimps from West Africa: the first euryrhynchinids (Decapoda Palaemonidae) reported from the Old World. Revue de Zoologie Africaine, 90, 883 - 902.
- Powell, C. B. (1977) A revision of the African freshwater shrimp genus Desmocaris Sollaud, with ecological notes and description of a new species (Crustacea Decapoda Palaemonidae). Revue de Zoologie Africaine, 91, 649 - 674.
- Holthuis, L. B. (1993) The recent genera of the caridean and stenopodidean shrimps (Crustacea, Decapoda) with an appendix on the order Amphionidacea. Nationaal Natuurhistorisch Museum, Leiden, 328 pp.
- Pereira, G. (1997) A cladistic analysis of the freshwater shrimps of the family Palaemonidae (Crustacea, Decapoda, Caridea). Acta Biologica Venezuelica, 17, 1 - 69.
- De Grave, S. (2007) A new species of Euryrhynchus Miers, with a discussion of the systematic position of the Euryrhynchidae Holthuis (Crustacea, Decapoda). Zoologischer Anzeiger, 246, 193 - 203. https: // doi. org / 10.1016 / j. jcz. 2007.06.002
- De Grave, S., Cai, Y. & Anker, A. (2008) Global diversity of shrimps (Crustacea: Decapoda: Caridea) in freshwater. Hydrobiologia, 595, 287 - 293. https: // doi. org / 10.1007 / s 10750 - 007 - 9024 - 2
- Bracken, H. D., De Grave, S. & Felder, D. L. (2009) Phylogeny of the infraorder Caridea based on mitchondrial and nuclear genes (Crustacea: Decapoda). In: Martin, J. W., Crandall, K. A. & Felder, D. L. (Eds.), Decapod Crustacean Phylogenetics. Crustacean Issues. Vol. 18. CRC Press, Taylor & Francis Group, Boca Raton, London & New York, pp. 281 - 305. [Koenemann, S. (Series Ed.)]
- De Grave, S. & Fransen, C. H. J. M. (2011) Carideorum Catalogus: the recent species of the dendrobranchiate, stenopodidean, procarididean and caridean shrimps (Crustacea: Decapoda). Zoologische Mededelingen, 85, 195 - 589.
- Ashelby, C. W., De Grave, S. & Johnson, M. L. (2015) Preliminary observations on the mandibles of palaemonoid shrimp (Crustacea: Decapoda: Caridea: Palaemonoidea). PeerJ, 3, e 846, 1 - 28. https: // doi. org / 10.7717 / peerj. 846
- De Grave, S., Piscart, C., Tuekam Kayo, R. P. & Anker, A. (2017) A new groundwater-dwelling species of Euryrhynchina from Cameroon (Malacostraca, Decapoda, Euryrhynchidae). Zootaxa, 4254 (1), 120 - 126. https: // doi. org / 10.11646 / zootaxa. 4254.1.8
- Nwadiaro, C. S. (1984) The longitudinal distribution of macroinvertebrates and fish in a lower Niger Delta River (River Sombreiro) in Nigeria. Hydrobiological Bulletin, 18, 133 - 140. https: // doi. org / 10.1007 / BF 02257052