African Caridina (Crustacea: Decapoda: Caridea: Atyidae): redescriptions of C. africana Kingsley, 1882, C. togoensis Hilgendorf, 1893, C. natalensis Bouvier, 1925 and C. roubaudi Bouvier, 1925 with descriptions of 14 new species Jasmine Richard Paul F. Clark Zootaxa 2009 2009-02-04 1995 1 75 8VK7H Richard & Clark 2009 [151,388,1733,1759] Malacostraca Atyidae Caridina GBIF Animalia Decapoda 34 35 Arthropoda species ghanensis sp. nov.  ( Figs. 16, 17)   Material examined. Holotype:º  Republic of Ghana(former Gold coast) Pond Vume, coll. R. Bassindale, 23.3.1949, det. J. Richard and P. Clark 2007, NHM2007.724.  Paratypes:Pond Vume, coll. R. Bassindale, 23.3.1949, det. J. Richard and P. Clark 2007, NHM2007.725–734, 5♂, 1♀ovig., 26♀, 28 juv.; freshwater, Pond Vume, 23.3.1949, coll. R. Bassindale, RMNHD 10218, 5♂, 3♀ovig., 32♀, 23 juv.  TogoLa Sio near Lomé, 5.12.1949, Don. Inst. Franç. Afr. Noire, RMNHD 19461, 1♂, 1♀.   Description. Total length: 11–23 mm. Carapace length: 2.2–3.0 mm.  Rostrum( Fig. 16a, b, c, d, e): extending from second segment of antennular peduncle to end of antennal scale. 2–3 mmin length. 0.8–1.0 × long as carapace. 10–21 (mostly 14–17) teeth on dorsal margin leaving 0.3–0.6 of length distally unarmed. 1 or 2 post-orbital teeth. 0–7 (mostly 2–5, rarely 0) teeth on ventral margin. Tip pointed or bifid. Formula (1–2) 10–23/0–7 mostly (1–2) 14–17/2–5.   FIGURE 17.  Caridina ghanensis  sp. nov., NHM 2007.725–734, ♂: a) First pereiopod; b) Second pereiopod; c) Third pereiopod; d) Dactylus of third pereiopod; e) Fifth pereiopod; f) Dactylus of fifth pereiopod; g) First pleopod; h) Endopod of first pleopod. ♀ ovig.: i) First pleopod; j) Eggs. ♂: k) Second pleopod; l) Appendix masculina; m) Appendix masculine; n) Telson; o) Posterior margin of telson; p) Uropod; q) Uropod diaeresis spinules; r) Preanal carina.  Antennular peduncle( Fig. 16f): 0.7–0.9 × carapace. Stylocerite 0.6–0.8 × length of basal segment. Anterolateral teeth of basal segment 0.1–0.2 × second segment. 6–10 segments bearing aesthetascs.  First pereiopod( Fig. 17a): dactylus 0.9–1.1 × palm of propodus. Chela 2.1–2.5 × long as broad. Carpus 2.2–2.7 × long as broad, anterior excavation not deep.  Second pereiopod( Fig. 17b): dactylus 1.5–1.9 × long as palm of propodus. Chela 2.5–3 × long as broad. Carpus 4–5 × long as broad.  Third pereiopod( Fig. 17c, d): dactylus 3.2–3.8 × long as broad. Spines on dactylus varied 7–10 (including terminal spines), mostly 7 or 8. Propodus 3.3–3.9 × long as dactylus and 10.5–12 × long as broad with 6–8 spines arranged along inner margin. Carpus 0.5–0.6 × long as propodus, with 10–15 minute spines on inner margin. Merus 1.4–1.6 × carpus length. Merus with 2 large spines and fine setae along posterior margin.  Fifth pereiopod( Fig. 17e, f): dactylus 4–4.5 × long as broad with 20–40 spines arranged in comb-like fashion on inner margin. Propodus 12–14 × long as broad and 2.8–3.5 × long as dactylus with 6–10 spines arranged along posterior margin. Carpus 0.5–0.6 × propodus length and with minute spines along inner margin. Merus 1.5–1.9 × carpus length, with 2 large spines and fine setae along posterior margin.  Setobranchs: 1 on all pereiopods.  First male pleopod( Fig. 17g, h): endopod 0.25–0.30 × exopod length. Appendix interna absent. Long setae at tip slant forward giving cobra-hood appearance to endopod.  First female pleopod( Fig. 17i): endopod 0.3–0.4 × long as exopod.  Eggs( Fig. 17j): 15–20, 0.65–0.70 × 0.35–0.40 mmin size.  Second male pleopod( Fig. 17k, l, m): appendix masculina, 0.7–1.1 × appendix interna being shorter, equal to, or slightly longer than appendix interna. 0.24–0.35 × endopod.  Sixth abdominal somite: 0.7–0.9 × long as carapace.  Telson( Fig. 17n, o): tapering, 0.8–1.0 × long as sixth abdominal somite. Dorsal spines 3–4 pairs (including subterminal spine). 1 pair of plain lateral spines and 3–4 pairs or 7 or 9 finely plumose stalked processes of equal length on rounded or flattened posterior margin of telson.  Uropod( Fig. 17p, q): 4–8 (mostly 5–6) diaeresis spinules.  Preanal carina( Fig. 17r): sharp with small spine.   Remarks.  Caridina ghanensis  sp. nov.is distinguished by the following characters: smaller size of the adult ( 11–23mm), dorsal teeth of the rostrum always arranged proximally leaving the distal margin unarmed, ventral teeth of rostrum are arranged distally with a short distal unarmed margin, dactylus of the fifth pereiopod with fewer number of spines (25–40), appendix masculina shorter, equal or slightly longer than the appendix interna, a reduced number of uropod diaeresis spinules and 15–20 smaller eggs of 0.65–0.7 × 0.35–0.4 mm.    Caridina ghanensis  sp. nov.is similar to  C. africanawith respect to the rostrum having dorsal teeth arranged proximally leaving the distal margin unarmed and terminating in a bifid tip. The new species, however, differs from  C. africanain having the teeth on the ventral margin being arranged distally.   Caridina ghanensis  sp. nov.is similar to  C. togoensisby the arrangement of plumose processes on the posterior margin of the telson. The new species differs from  C. togoensisin having a rostrum with a bifid tip (rarely acute), teeth on ventral margin being always arranged distally, 20–40 spines on the dactylus of the fifth pereiopod, a shorter appendix masculina, 4–8 (mostly 5–6) spinules on the uropod diaeresis and 15–20 smaller eggs.   Etymology.  Caridina ghanensis  sp. nov.is named after the Republic of Ghanafrom where the species was collected.