Euryrhynchina edingtonae Powell, 1976

Pachelle, Paulo P. G. & Tavares, Marcos, 2018, The freshwater shrimp family Euryrhynchidae Holthuis, 1950 (Crustacea: Decapoda: Caridea) revisited, with a taxonomic revision of the genus Euryrhynchus Miers, 1878, Zootaxa 4380 (1) : 10-12

Euryrhynchina edingtonae Powell, 1976

( Figs. 3 , 4 , 62B )

Euryrhynchina edingtonae Powell, 1976: 895 , figs. 5–7.

Euryrhynchina edingtonae — Powell 1977: 671; Victor & Ogbeibu 1985: 343; Holthuis 1993: 184, fig. 179; Pereira & García 1995: 128 (tab. 1); Pereira 1997: 3, tabs. 6, 7, 9, figs. 1, 39–41; Ogbeibu & Oribhabor 2002: 2429; Ikomi et al. 2005: tab. 2; De Grave 2007: 201; De Grave & Fransen 2011: 309; De Grave et al. 2017: 120.

Euryrhynchyna edingtonae — Pereira 1997: 51, tab. 6 [lap. cal.].

Euryrhynchyna edingtone — Olomukoro 2009: 309; Olomukoro & Dirisu 2014: tab. 1 [lap. cal.].

Material examined. Paratypes: 11♂ (cl 3.4– 1.9 mm), 23♀ (cl 3.2– 1.7 mm), 4♀ ov (cl 3.2– 2.9 mm), RMCA 54030 , Nigeria, Edo State, swamp forest along Ogba River, 06°12'N 05°35'E, coll. C.B. Powell, 09.iv.1975 . Additional material: 24♂ (cl 3.5– 1.9 mm), 22♀ (cl 4.1– 2.2 mm), 5♀ ov (cl 4.1– 3.2 mm), USNM 171376 , Nigeria, Rivers State, Port Harcout, Rumokoroshe , swamp forest stream, 04°51'00''N 07°03'42''E, coll. F. Ojarikre & C.B. Powell, 29.xii.1978 .

Type locality. Swamp forest near Ogba River, about 8 km southwest of Benin city , Edo State ( Nigeria) .

Distribution. Nigeria (Edo State, Delta State, Rivers State) ( Powell 1976; Victor & Ogbeibu 1985; Pereira 1997; Ogbeibu & Oribhabor 2002; Ikomi et al. 2005; Olomukoro 2009; Olomukoro & Dirisu 2014; present study) ( Fig. 62B , yellow circles).

Description. Powell (1976: 895, figs. 5–7). The material from Rumokoroshe (Rivers State, Nigeria) is illustrated in Figs. 3–4 .

Remarks. The material from Rivers State (USNM 171376), studied by Pereira (1997), represents the first record of E. edingtonae outside of Edo and Delta states where the species has been often reported ( Fig. 62B , yellow circles). The specimens match well the description and illustrations in Powell (1976) (see also Figs. 3 , 4 ). The genus Euryrhynchina was believed to be monotypic until recently when a second species was described ( De Grave et al. 2017). For the morphological differences between the two species, see remarks under E. puteola .

Figures

FIGURE 3. A–H, Euryrhynchina edingtonae Powell, 1976: male (cl 3.0 mm), Rumokoroshe, Rivers, Nigeria (USNM 171376). (A) Anterior region of the body, dorsal view; (B) Fourth sternite of pereon, median region, ventral view; (C) Fifth sternite of pereon, median region, ventral view; (D) Right second pereopod, lateral view; (E) Same, chela and carpus, dorsal (mesial) view; (F) Same, carpus and distal regionof merus, mesial view, setaeand granules omitted; (G) Left second pereopod, lateral view; (H)Same, chela and carpus, dorsal (mesial) view.

FIGURE4. A–G,Euryrhynchina edingtonaePowell, 1976:male (cl 3.0mm), Rumokoroshe, Rivers,Nigeria (USNM 171376). (A) Right third pereopod, lateral view; (B) Same, dactylus and distal region of propodus, lateral view; (C) Right fourth pereopod, lateral view; (D) Same, dactylus and distal region of propodus, lateral view; (E) Same, mesial view; (F) Right fifth pereopod, lateral view; (G) Same, dactylus and distal region of propodus, lateral view.

FIGURE 62. Distribution maps for the African euryrhynchids. (A–B) Euryrhynchoides holthuisi Powell, 1976 (blue circles). (B) Euryrhynchina edingtonae Powell, 1976 (yellow circles) and Euryrhynchina puteola De Grave, Piscart, Tuekam Kayo & Anker, 2017 (orange circle).The corresponding localities for each point on the maps are indicated on the Appendix 1A–C.