Caridina serratirostris De Man, 1892: 382 Caridina serratirostris var. typica Bouvier, 1925: 218 Caridina serratirostris Roux 1926: 248 Page et al. 2007: 647 Caridina serratirostris Holthuis 1978: 38 Solomon’s Gold Mine: Description or redescription of 24 species of Caridina (Crustacea: Decapoda: Atyidae) freshwater shrimps from the Solomon Islands, including 11 new species Mazancourt, Valentin de Boseto, David Marquet, Gerard Keith, Philippe European Journal of Taxonomy 2020 2020-08-04 696 1 86 8VKDZ De Man, 1892 De Man 1892 [571,1017,1695,1722] Malacostraca Atyidae Caridina Animalia Decapoda 68 69 Arthropoda species serratirostris   Figs 2A, 23      Caridina serratirostris De Man, 1892: 382, pl. 23, figs 28a–e ( typelocality: “Bangkalan” and “Bonea” Rivers, Selayar, Indonesia).     Caridina serratirostrisvar. typica Bouvier, 1925: 218(partim), 480–486.    Caridina serratirostris–  Roux 1926: 248. —  Page et al.2007: 647(GenBank: DQ478515).  Not  Caridina serratirostris–  Holthuis 1978: 38; fig. 13.    Material examined    Paralectotypes( lectotypedesignated in Cai & Shokita 2006b)  INDONESIA• 1 ♀ovig., cl 4.0 mm, 1 ♂, cl 3.1 mm; Selayar Island, Bangkalan; 1889; M. Weberleg.; MNHN-IU-2015-1907 •  1 ♀ovig., cl 4.1 mm; same collection data as for preceding; MNHN-IU-2015-1908.  Other material   SOLOMON ISLANDS–  Choiseul Island• 1 ♀ovig., cl 5.0 mm; Vorama River; 06°58.687´S, 156°46.746´E;  15 ma.s.l.;  11 Oct. 2014; P. Gerbeaux, P. Keithand G. Marquetleg.; DNA voucher: CA1351; MNHN-IU-  2018-2927•  1 ♀ovig., cl 3.4 mm; Lopakare River, upstream; 07°01.613´S, 156°46.567´E;  50 ma.s.l.;  20 Oct. 2014; P. Gerbeaux, P. Keithand G. Marquetleg.; MNHN-IU-  2018-2928•  1 ♀ovig., cl 3.5 mm; Lopakare River, downstream; 07°01.834´S, 156°45.789´E;  21 Oct. 2014;  14 ma.s.l.; P. Gerbeaux, P. Keithand G. Marquetleg.; MNHN-IU-  2018-2929•  1 ♀ovig., cl 3.6 mm; same collection data as for preceding; MNHN-IU-  2018-2930. –   Kolombangara Island• 1 ♀ovig., cl 3.6 mm; Vanga2 River; 07°54.825´S, 156°57.7624´E;  18 Nov. 2015; P. Keith, C. Lordand G. Marquetleg.; DNA voucher: CA1523; MNHN-IU-  2018-2931. –   Vella Lavella Island• 1 ♀ovig., cl 3.8 mm; Vala Kadju; 07°49.860´S, 156°42.644´E;  28 Oct. 2016; P. Keithand C. Lordleg.; MNHN-IU-  2018-2932• 1 ♂, cl 2.5 mm; Maravari River; 07°51.703´S, 156°41.748´E;  31 Oct. 2016; P. Keithand C. Lordleg.; MNHN-IU-  2018-2933•  1 ♀ovig., cl 3.6 mm; same collection data as for preceding; MNHN-IU-  2018-2934. –   Isabel Island• 1 specimen; Rapa River; 07°28.527´S, 158°17.105´E;  0–7 ma.s.l.;  23 Oct. 2019; P. Keith, C. Lord, R. Causseand D. Bosetoleg.; DNA voucher: CA2530; MNHN.   AUSTRALIA–  Queensland• 1 ♀ovig., cl 4.1 mm; Captain Cook Highway; 16°22.266´S, 145°24.551´E;  64 ma.s.l.;  14 Jun. 2016; B. Mosleg.; MNHN-IU-  2018-2935•  1 ♀ovig., cl 3.2 mm; same collection data as for preceding; MNHN-IU-  2018-2936•  1 ♀ovig., cl 3.8 mm; Johnstone River; 17°30.933´S, 145°59.437´E;  8 ma.s.l.;  11 Jun. 2016; B. Mosleg.; MNHN-IU-  2018-2937•  1 ♀ovig., cl 3.2 mm; Barron River; 16°52.443´S, 145°40.830´E;  5 ma.s.l.;  8 Jun. 2016; B. Mosleg.; MNHN-IU-  2018-2938•  1 ♀ovig., cl 3.6 mm; Mowbray River; 16°33.859´S, 145°27.844´E;  15 ma.s.l.;  14 Jun. 2016; B. Mosleg.; MNHN-IU-  2018-2939.   PAPUA NEW GUINEA• 1 ♀ovig., cl 5.4 mm; New Britain, Rangihiswamp; 05°34.549´S, 149°28.943´E;  24 Oct. 2018; R. Causse, P. Keithand C. Lordleg.; MNHN-IU-  2018-2940.    Description CEPHALOTHORAX. Antennal spine ventral to inferior orbital angle. Pterygostomian margin rounded. Rostrum ( Fig. 23m–n): straight, short, 0.6–0.9 of cl, reaching beyond end of antennular peduncle, armed with 22–26 teeth on dorsal margin, 7–10 of them situated on carapace behind orbital margin, ventral margin with 6–7 teeth. Eyes developed, anterior end reaching to 0.54 times length of basal segment of antennular peduncle. Long antennular peduncle, 0.78 ( ♀) – 0.95 (♂) times as long as carapace; second segment distinctly longer than third segment. Stylocerite reaching to middle of second segment of antennular peduncle. PEREIOPODS. Epipods on first four pereiopods. P1 ( Fig. 23a): chela about 2.3–2.9 times as long as wide, movable finger 4.1–5.1 times as long as wide, 1.1–1.8 times length of palm; carpus 3.3–4.5 times as long as wide. P2 ( Fig. 23b) more slender and longer than first pereiopod, with chela 3.7–5.1 times as long as wide: movable finger 6.0–8.3 times as long as wide, 1.7–1.9 times length of palm; carpus slender, 8.3–10.9 times as long as wide. P3 ( Fig. 23c): slender, dactylus ( Fig. 23e) 3.7–4.4 times as long as wide (terminal spiniform seta included), with 6–7 spiniform setae on flexor margin including terminal one; propodus 14.2–17.1 times as long as wide, 4.1–5.3 times as long as dactylus, distinctive very long seta on distal end of carpus and merus. P5 ( Fig. 23d): dactylus ( Fig. 23f) 4.5–5.5 as long as wide, with 10–15 spiniform setae on flexor margin; propodus 18.7–24.0 times as long as wide, 4.5–5.5 times as long as dactylus. ABDOMEN. Third abdominal somite with moderately convex dorsal profile. Sixth abdominal somite 0.56 times as long as carapace, 1.7 times as long as fifth somite, shorter than telson. TELSON ( Fig. 23i). 2.5–3.5 times as long as wide, with five pairs of dorsal spinules and pair of dorsolateral spinules; posterior margin with small median process, rounded, with 8–10 very long intermediate plumose setae longer than lateral ones. MALE PLEOPODS. Pl1 ( Fig. 23j): endopod rounded, 1.4 times as long as wide, reaching 0.22 times length of endopod, no appendix. Pl2 ( Fig. 23k): appendix masculina reaching 0.77 times length of endopod; appendix interna reaching 0.75 times length of appendix masculina. PRE- ANAL CARINA ( Fig. 23g). High, with a spine. UROPODAL DIAERESIS ( Fig. 23h). With 15–17 spinules. EGGS. Ovigerous females with small eggs, size: 0.30–0.38 × 0.18–0.23mm.   Habitat   Caridina serratirostrislives from the estuarine brackish water to the fresh water in the lower course of the rivers.  Colour pattern( Fig. 26D) The body is yellowish to reddish with many red dots.    Distribution This species occurs in Indonesia(Selajar), the Solomon Islands, Australiaand Papua New Guinea( New Britain).    Remarks Our specimens fit well with the typesfrom Selayar: straight rostrum, 0.6–0.9 of cl (vs 0.6–0.9 inthe typespecimens), sometimes reaching the end of the antennular peduncle, armed with 22–26 teeth on dorsal margin (vs 20–27), 7–10 of them situated on carapace behind orbital margin (vs 8–9), ventral margin with 6–7 teeth (vs 4–7); P1 carpus 3.3–4.5 times as long as wide (vs 3.1–4.9); P2 carpus 8.3–10.9 times as long as wide (vs 7.0–9.0); P3 dactylus with 6–7 spiniform setae (vs 6–7) propodus 4.1–5.3 times as long as dactylus (vs 3.8–4.2); uropodal diaresis with 15–17 spinules (vs 14–19); small eggs, 0.30–0.38 × 0.18–0.23 mm(vs 0.28–0.31 × 0.13–0.15); no appendix interna on the endopod of the male first pleopod. 2824256505 [234,972,314,341] Bangkalan & M. Weber Indonesia Selayar Island 69 70 1 1 paralectotype 2824256517 MNHN- Bangkalan & M. Weber Indonesia Selayar Island 69 70 1 1 2824256487 2014-10-11 2927 2014-10-11 P. Gerbeaux & P. Keith & G. Marquet Solomon Islands Island 15 -6.9781165 Vorama River 1 156.7791 69 70 1 1 Choiseul 2824256539 2014-10-20 2928 2014-10-20 MNHN- P. Gerbeaux & P. Keith & G. Marquet Solomon Islands Island 50 -7.026883 Lopakare River 1 156.77612 69 70 1 1 Choiseul 2824256335 2014-10-21 2929 2014-10-21 P. Gerbeaux & P. Keith & G. Marquet Solomon Islands Island 14 -7.0305667 Lopakare River 1 156.76315 69 70 1 1 Choiseul 2824256343 2018 2930 2018 P. Gerbeaux & P. Keith & G. Marquet Solomon Islands Island 14 -7.0305667 Lopakare River 1 156.76315 69 70 1 1 Choiseul 2824256474 2015-11-18 2931 2015-11-18 P. Keith & C. Lord & G. Marquet Solomon Islands Kolombangara Island -7.91375 River 1 156.9627 Vanga 69 70 1 1 Choiseul 2824256561 2016-10-28 2932 2016-10-28 MNHN- P. Keith & C. Lord Solomon Islands Vella Lavella Island -7.831 Vala Kadju 1 156.71074 69 70 1 1 Choiseul 2824256365 2016-10-31 2933 2016-10-31 P. Keith & C. Lord Solomon Islands Vella Lavella Island -7.8617167 Maravari River 1 156.6958 69 70 1 Choiseul 2824256307 2018 2934 2018 P. Keith & C. Lord Solomon Islands Vella Lavella Island -7.8617167 Maravari River 1 156.6958 69 70 1 1 Choiseul 2824256426 2019-10-23 MNHN P. Keith & C. Lord & R. Causse & D. Boseto Solomon Islands Island 4 -7.47545 Rapa River 1 158.28508 69 70 1 Isabel 2824256350 2016-06-14 2935 2016-06-14 B. Mos Australia 64 -16.3711 Captain Cook Highway 1 145.40918 69 70 1 1 Queensland 2824256560 2018 2936 2018 B. Mos Australia 64 -16.3711 Captain Cook Highway 1 145.40918 69 70 1 1 Queensland 2824256586 2016-06-11 2937 2016-06-11 B. Mos Australia 8 -17.51555 Johnstone River 1 145.99062 69 70 1 1 Queensland 2824256391 2016-06-08 2938 2016-06-08 MNHN- B. Mos Australia 5 -16.87405 Barron River 1 145.6805 69 70 1 1 Queensland 2824256319 2016-06-14 2939 2016-06-14 B. Mos Australia 15 -16.564316 Mowbray River 1 145.46407 69 70 1 1 Queensland 2824256606 2018 2940 2018 R. Causse & P. Keith & C. Lord Papua New Guinea -5.5758166 Rangihi 1 149.48238 69 70 1 1 West New Britain