Caridina kaombeflutilis, Richard & Clark, 2010
Richard, Jasmine & Clark, Paul F., 2010, Caridina H. Milne Edwards, 1837 (Crustacea: Decapoda: Caridea: Atyoidea: Atyidae) - freshwater shrimps from eastern and southern Africa *, Zootaxa 2372 (1), pp. 305-337 : 331-334
treatment provided by
Caridina kaombeflutilis sp. nov.
Material Examined. Type: holotype male, Malawi Kaombe River , pres. Harrison, May 1951, SAM A 10667 View Materials ; paratypes SAM A 10667 View Materials , 5 males , 3 ov. females, 12 females; site 15, pool in stream bed above Lake Chikukutu , 12°58'15"S, 34°13'00"E, coll. D. Tweddle, 25.7.1995, AM CAW 158 A, 9 males GoogleMaps , 2 ov. females, 10 females; site 16, Kaombe River, Lakeshore Road at Nkhotakota, 12°54'S, 34°13'E, coll. D. Tweddle, 23.7.1995, AM CAW 159 B, 5 males GoogleMaps , 10 ov. females, 6 females.
Description. Total length: 14–30 mm. Carapace length: 3–4.5 mm.
Rostrum ( Figs. 14a–d View FIGURE 14 ): Straight, mostly reaching end of antennal scale or slightly longer. Length 3–5 mm 1.0–1.1 of carapace. 20–30 teeth on dorsal proximal margin of rostrum leaving 0.2–0.5 of dorsal margin unarmed distally, which is interrupted by 0–6 teeth of which 1–3 present at tip. 2 or 3 post-orbital teeth; 8–15 teeth on ventral margin from proximal end leaving short distal part unarmed. Tip pointed. Formula (1–3) 20– 30 + 0–6/8–15.
Antennular peduncle ( Fig. 14d View FIGURE 14 ): 0.7–0.8 of carapace length. Stylocerite 0.6–0.7 of length of basal segment, anterolateral tooth of basal segment 0.20–0.25 of second segment. 7–15 segments bearing aesthetascs.
First pereiopod ( Fig. 15a View FIGURE 15 ): dactylus 1.0–1.1 of palm of propodus. Chela 2.0–2.2 as long as wide. Carpus 2.1–2.2 as long as wide, anterior excavation shallow.
Second pereiopod ( Fig. 15b View FIGURE 15 ): dactylus 1.1–1.3 as long as palm of propodus. Chela 2.8–3 as long as wide. Carpus 5–5.4 as long as wide. Brush-like setae at tip of chelae on first and second pereiopods.
Third pereiopod ( Figs. 15c–d View FIGURE 15 ): dactylus 4–4.5 as long as wide with 6–10 spines including terminal spine. Propodus 4.5–5 as long as dactylus and 15.5–17 as long as wide with 9–14 spines along posterior margin. Carpus 0.55–0.6 as long as propodus with 4–5 spines on inner margin. Merus 1.5–1.7 of carpus length with 2 large spines on posterior margin.
Fifth pereiopod ( Figs. 15e–f View FIGURE 15 ): dactylus 4.3–4.8 as long as wide with 40–55 spines in comb-like arrangement on inner margin. Propodus 14–16 as long as wide and 3–3.5 as long as dactylus with 9–16 spines arranged along inner margin. Carpus 0.49–0.6 of propodus length with 3–5 spines along inner margin. Merus 1.6–1.8 of carpus length, with 2 large spines along posterior margin.
Setobranch: 2 setae on each pereiopod.
First male pleopod ( Figs. 15g –h View FIGURE 15 ): endopod 0.20–0.25 of exopod length. No appendix interna present.
First female pleopod ( Fig. 15i View FIGURE 15 ): endopod 0.3–0.4 as long as exopod.
Eggs (Fig. j) 45– 85 eggs of 0.65–0.7 × 0.35–0.4 mm in size.
Second male pleopod ( Figs. 15k, l View FIGURE 15 ): appendix masculina 1.3–1.6 as lomg as appendix interna, 0.23–0.26 as long as endopod.
Sixth abdominal somite: 0.6–0.7 as long as carapace.
Telson ( Figs. 15m –n View FIGURE 15 ): 1.0–1.1 as long as 6 th abdominal somite with 4–6 pairs dorsal spines including subterminal spines. Posterior margin of telson triangular with or without medial process bearing 1 pair of long lateral spines and 1–3 pairs or 5 inner spines of equal length and shorter than lateral spines.
Uropod ( Fig. 15o View FIGURE 15 ): 7–10 diaeresis spinules.
Preanal carina ( Fig. 15p View FIGURE 15 ): unarmed.
Etymology. An arbitrary combination of words, named for the Kaombe River; fluviatilis from the Latin meaning of a river.
Distribution. Known only from the type locality in Malawi.
Remarks. Caridina kaombeflutilis sp. nov. is distinguished from all African congeners by the straight rostrum with its proximal arrangement of 20–30 teeth on the dorsal margin and the short unarmed distal margin being interrupted by 0–6 teeth; 45– 85 eggs of 0.65–0.7 × 0.35–0.4 mm and in having 7–10 uropodal diaeresis spinules. It is close to C. moeri , in having an increased number of teeth on the dorsal margin of rostrum, a lesser number of uropod diaeresis spinules and smaller eggs. However, it differs from C. moeri in the proximal arrangement of 20–30 teeth on the dorsal rostral margin leaving a short distal margin unarmed which is interrupted by 0–6 teeth, having two or three pairs or five longer spines of equal length that are shorter than the lateral spines on the posterior margin of the telson and in possessing 45– 85 eggs. Caridina moeri is distinct from C. kaombeflutilis sp. nov. in having 25–48 teeth always extending up to the tip on the dorsal margin of the rostrum, four or five pairs or seven or nine short spines of equal length that are equal in length to the lateral spines at the posterior margin of the telson and in possessing 135– 150 eggs.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.