Atyopsis moluccensis (De Haan, 1849)

Cai, Yixiong, Ng, Peter K. L. & Choy, Satish, 2007, Freshwater Shrimps Of The Family Atyidae (Crustacea: Decapoda: Caridea) From Peninsular Malaysia And Singapore, Raffles Bulletin of Zoology 55 (2), pp. 277-309 : 278-279

Atyopsis moluccensis (De Haan, 1849)

Atya moluccensis De Haan, 1849: 186 , Pl. O. [type locality unknown, assumedly from Moluccas, Indonesia].

Atyopsis moluccensis – Chace, 1983: 27, Figs. 16 –19; Ng & Chong, 1986: 30, 1 fig.; Ng & Chia, 1994: 644, Figs. 1 , 3–10 ; Yeo et al., 1999: 213; Wowor et al., 341, Fig. 5D .

Atya armata Lanchester, 1901:559 .

Atya spinipes Johnson, 1961a: 145 , Figs. 38–42 (not Atya spinipes Newport, 1847 ).

Material examined. – Peninsular Malaysia: 6 males, 6 females (largest cl 19.8 mm), ZRC, Sungai Baharu tributary, along Tekek- Juara trail, Pulau Tioman, Malaysia, coll. O. Chia et al., 27 Jun.1997 : 5 males (largest cl 22.7 mm), ZRC, Tekek falls, Sungai Ayer Besar, along Tekek-Juara trail, Pulau Tioman, Malaysia, coll. O. Chia et al., 23 Jun.1997 ; 3 females, 6 juveniles (largest cl 20.6 mm), ZRC, Sungai Nipah , Pulau Tioman, Malaysia, coll. O. Chia et al., 27 Jun.1997 ; 6 males, 8 females, 7 juveniles (largest male cl 21.0 mm), ZRC, Sungai Keliling , Pulau Tioman, Malaysia, coll. H. H. Tan et al., 23–27 Jun.1997 ; 7 males, 12 females (largest male cl 26.9 mm), ZRC 1996.1776 , Sungai Paya, Kampung Paya, Pulau Tioman , Malaysia , coll. P. K. L. Ng et al., 16 Sep.1995 : 1 male, 1 female, 1 juvenile (largest cl 21.6 mm), ZRC 1996.1777 , Kampung Paya, Sungai Paya, Pulau Tioman , Malaysia, coll. H. H. Tan et al., 18 Sep.1995 ; 23 males, 26 females (largest male cl 28.0 mm), ZRC 1996.1778 , Sungai Paya, Kampung Paya, Pulau Tioman , Malaysia , coll. P. K. L. Ng et al., 25–27 Jun.1996 ; 9 males, 13 females (largest male cl 25.3 mm), ZRC 1996.1779 , Sungai Raya, Kampung Mukut, Pulau Tioman , Malaysia , coll. P. K. L. Ng et al., 26 Jun.1996 ; 12 males, 12 females (largest male cl 28.0 mm), ZRC 1996.1780 , Sungai Asah, Pulau Tioman , coll. P. K. L. Ng et al., 26 Jun.1996 ; 12 males, 17 females (largest male cl 28.0 mm), ZRC 1996.1781 , Sungai Keliling, Pulau Tioman, Malaysia , coll. P. K. L. Ng et al., 27–28 Jun.1996 ; 1 male, ZRC 2007.0318 , second last stream before reaching Juara along Tekek-Juara path, Pulau Tioman , Malaysia , coll. S. S. C. Chong, no date ; 2 females, cl 4.8–5.6 mm, ZRC 2007.0319 , Sekayu waterfall, Terengganu, Malaysia , coll. H. H. Tan, 17 Jun.1995 ; 2 females, cl 5.4–5.5 mm, ZRC 2007.0320 , Malaysia, Stream outside Sekayu Waterfall , pH 5.3, coll. P. K. L. Ng, 18 Mar.1992 .

Comparative material examined. – Atyopsis moluccensis : Sumatra: 1 male, cl 19 mm, 1 ovigerous female, cl 15 mm, ZRC 2007 . 0321, Sungai Seruai, near Biru Biru, Sumatra , Indonesia , coll. M. Kottelat, 2 Nov.1984 . Borneo: 2 males, cl 15.7–16.3 mm, 1 female, cl 16 mm, Sarawak: Kubah, Raya station 4, 1977 ; 2 females, cl 7.5–10.3 mm, ZRC 2007.0322 , Borneo: Sarawak, Austin’s Place , Kampung Benut near Penrissen , coll. H. H. Tan & P. Yap, 1 Oct.1998 ; 1 male, cl 13.2 mm, ZRC 2007.0323 , Brunei, Temburong, Sungai Dalalong at Kuala Beldeg , coll. K. Lim et. al., 14–17 Jun.1975 ; 1 male, cl 9.2 mm, ZRC 2007.0324 , Borneo, Sarawak: Serian , Sungai Kuhas , 6.9 km left at Tebelu Tebakang turnoff, 5.8 km into right trail, 1°09'10.0"N 110°29'22.7"E, coll. H. H. Tan, 19 Feb.1997 . Thailand: 2 females, cl 4.3–5.2 mm, CU1998.12, waterfall at Phuket, southern Thailand , no date . 6 females, cl 18.4–20, CU1998.15, Taotong waterfall, Phangnga, 27 Mar.1930 ; 16 specimens, CU1998.16, southern Thailand , no date ; 15 males, cl 13.2–20.6 mm, 13 females, cl 11.3–17.4 mm, ZRC 2007.0325 , Patong Waterfall, Phuket, southern Thailand , coll. K. Yongchindarat, 19 Aug.1980 ; 1 male, cl 7.5 mm, southern Thailand , coll. D. Yeo, 21 Feb.2001 .

Atyopsis spinipes ( Newport, 1847) : Japan: l0 males, 10–15mm, 4 females, cl 15–18 mm, 2 ovigerous females, cl 14–15 mm, ZRC 2007.0326 24°30.11'N 124°15.26'E, Gubyunmata River , Ishigaki Island, pH 7.3, coll. Y. Cai & T. Naruse, 13 Jun.2000 ; 1 female, cl 7.1 mm, ZRC 2007.0327 , 24°22.76'N 124°14.80'E, Gubyunmata River , Ishigaki Island, pH 7.3, coll. Y. Cai & T. Naruse, 13 Jun.2000 ; 1 male, cl 12 mm, 1 female, cl 15 mm, 1 ovigerous female, cl 16 mm, ZRC 2007.0328 , 24°26.05'N 124°14.52'E, small river in Tsuru Town , Ishigaki Island, coll. Y. Cai, N. K. Ng & T. Naruse, 17 Jun.2000 . Taiwan: 1 female, cl 5.1 mm, ZRC 2007.0329 , Tungho River , Taitung County, coll. Y. Cai et al., 24 Nov.1997 . Philippines: 2 females, cl 6.0– 7.2 mm, ZRC 2007.0330 , river outside Inabacan Cave , Antequrra, Bohol, coll. Y. Cai et al., 16 Dec.2000 . Java: 1 male, cl 7.1 mm , 2 females, cl 3.8–4.0 mm, 3 juv., RMNH N42 a, Labuhan , West Java, Indonesia, no date . Moluccas: 1 male, cl 9.2 mm, 1 ovigerous female, cl 13.0 mm, ZRC 2007.0331 , Sungai Ifis , 1°24'N 128°13'E, Halmahera, Indonesia, Sep.1994 , coll. D. Robb; 1 female, cl 6.8 mm, SMF 7972 , Halmahera , 1894, coll. W. Kükenthal; 1 ovigerous female, cl 12 mm , 2 males, cl 9.0– 9.3 mm, SMF 7974 , Halmahera , Indonesia, 1894, coll. W. Kükenthal; 1 ovigerous female, cl 15 mm, Soah, Halmahera, Indonesia , 2 males, cl 8.3–11.5 mm, SMF, Morotai, 1 Oct.1930 . New Guinea: 2 females, cl 4.3–4.4 mm, RMNH 700 , two creeks near Seroei , Yapen Island, Irian Jaya, Indonesia, 22 Feb.1955 . Sulawesi: 1 female, cl 4.5 mm, 3 ovigerous females, cl 11.6–13.2 mm, ZRC 2007.0332 , Sungai Jalange at Desa Malawa , 20 km south of Parepare on road to Ujung Pandang, Kec. Malussetassi Kab. Bara, Sulawesi, Indonesia, coll. M. Kottelat, 15 Jun.1988 ; 4 males, cl 9.0– 9.5 mm, 7 females, cl 6.0– 14 mm, 1 ovigerous female, cl 18.1 mm, ZRC 2007.0333 , Sungai Terat , 19 km on road from Enrekang to Parepare, southern Sulawesi, Indonesia, coll. M. Kottelat & A. Werner, 9 Mar.1989 .

Diagnosis. – Body robust, pigmented, eyes well developed;

rostrum not strongly compressed laterally, without lateral lobes, median dorsal carina without spines, ventral keel with 7–16, usually 10–14 teeth. Anterior margin of carapace armed with strong antennal and pterygostomian spines, latter never reduced to angle; supraorbital spine absent; ventral margin of second to fifth abdominal pleura without sclerotized spinules; telson with posterolateral angle reaching beyond setiferous posterior margin; third maxilliped not ending in a spine; pereiopods without exopods; first and second pereiopods with chelae monomorphic, without palm, little if at all longer than wide; fingers tipped with brushes of long setae apparently adapted for filter feeding, carpus of both appendages deeply excavated anteriorly, much shorter than broad, shorter than fingers; third pereiopod with a prominent meral spur in large males; branchial formula complete, with 9 pairs of gills, without mastigobranchs; epipods present on first 4 pereiopods, reduced posteriorly; endopod of first pereiopod of male rigid, rhomboidally ovate; submarginally spinose, less than 1.5 times as long from proximal articulation to base of reticulation projection as maximum width, not including margin spines; second pleopod of male with appendix masculina cylindrical, spinose over entire length distal to base of appendix interna.

Habitat. – At coastal or insular freshwater habitats, with fast flowing hill and mountain streams, and similar riparian systems, living on rocks or among submerged roots.

Remarks. – In Malaysia, the species was first recorded by Lanchester (1901) from the Selama River in northwest Perak and Belimbing under the name of Atya armata . Johnson reported it under the name Atya spinipes from Kuala Kenyam Kechil, Pahang, Tahan River, near Kuala Tahan and a tributary of Jahor River, near Kota Tinggi, Johor. The specimens that we examined indicate that Atyopsis moluccensis is restricted to the Greater Sunda Islands (including Phuket at southern Thailand). Chace (1983: 33) stated that he had “seen specimens of A. moluccensis only from Thailand and Java.” Other distribution sites that he listed, viz. Sumatra, Bali, Sulawesi, Moluccas, Philippines, Andaman and Sri Lanka, were based only on literature. According to the present study, there is only A. spinipes distributed there.

Distribution. – With certainty only distributed in the Greater Sunda Islands (present study).

Figures

Fig. 16. Caridina johnsoni, new species: A, first pereiopod; B, second pereiopod; C, third pereiopod; D, dactylus of third pereiopod; E. fifth pereiopod; F, dactylus of fifth pereiopod; G, male first pleopod; H, male second pleopod. Scale bars: A–C, E = 0.5 mm; D, F = 0.1 mm; G, H = 0.2 mm. (A–F, ovigerous female, cl 3.3 mm, holotype; G, H, male, cl 2.5 mm, Lower Peirce Reservoir, ZRC).

Fig. 1. Map of Peninsular Malaysia and Singapore.

Fig. 3. Caridina peninsularis: A, antennular peduncle; B, scaphocerite; C, first pereiopod; D, second pereiopod; E, third pereiopod; F, dactylus of third pereiopod; G, fifth pereiopod; H, dactylus of fifth pereiopod; I, third maxilliped; J, preanal carina; K, diaeresis. Scale bars: A, B = 1 mm; C–E, G, I = 0.5 mm; F, H = 0.1 mm; K = 0.2 mm. (female, cl 5.0 mm, Penang, Peninsular Malaysia, ZRC).

Fig. 4. Caridina propinqua:A, B, cephalothorax and cephalic appendages; C, distal portion of telson; D, pre-anal carina; E, scaphocerite; F, first pereiopod; G, second pereiopod; H, third pereiopod; I, dactylus of third pereiopod; J, fifth pereiopod; K, dactylus of fifth pereiopod; L, diaeresis Scale bars: A, B, E = 1 mm; C, I, K, L = 0.2 mm; D, F–H, J = 0.5 mm. (A, female, cl 4.2 mm; B–K, female, cl 4.1 mm; all material from Sungei Buloh, Singapore, ZRC).

Fig. 5. Caridina propinqua: A, cephalothorax and cephalic appendages; B, pre-anal carina; C, scaphocerite; D, first pereiopod; E, second pereiopod; F, third pereiopod; G, dactylus of third pereiopod; H, fifth pereiopod; I, dactylus of fifth pereiopod; J, diaeresis. Scale bars: A, C = 1 mm; B, D–F, H = 0.5 mm; G, I, J = 0.2 mm. (female, cl. 3.7 mm, Sungei Mandai, Singapore, ZRC).

Fig. 6. Caridina propinqua: A, cephalothorax and cephalic appendages; B, scaphocerite; C, mandible; D, maxillula; E, maxilla; F, first maxilliped; G, second maxilliped; H, third maxilliped; I, first pereiopod; J, second pereiopod; K, third pereiopod; L, fifth pereiopod; M, endopod of male first pleopod; N, appendix masculina and appendix interna of male second pleopod. Scale bars: A, B = 1 mm; C–L = 0.5 mm; M, N = 0.2 mm. (male, cl 2.9 mm, Sungai Sedili, Johor, Peninsular Malaysia, ZRC).

Fig. 7. Caridina sumatrensis: A, cephalothorax and cephalic appendages; B, distal portion of telson; C, first pereiopod; D, second pereiopod; E, third pereiopod; F, dactylus of third pereiopod; G, fifth pereiopod; H, dactylus of fifth pereiopod; I, male first pleopod; J, male second pleopod. Scale bars: A = 1 mm; C–E, G = 0.5 mm; B, F, H, I, J = 0.2 mm. (male, cl 3.7 mm, Sungai Telor, Peninsular Malaysia, ZRC).

Fig. 8. Caridina thambipillaii: A, cephalothorax and cephalic appendages; B, telson; C, distal portion of telson; D, mandible; E, maxillula; F, maxilla; G, first maxilliped; H, second maxilliped; I, third maxilliped; J, preanal carina; K, diaeresis; L, scaphocerite. Scale bars: A = 1 mm, B, D–J = 0.5 mm; C, K = 0.2 mm. (A–C, female, cl 5.9 mm, D–K, ovigerous female, cl 5.7 mm; all material from Sungai Stunggang, Sarawak, East Malaysia, ZRC).

Fig. 9. Caridina thambipillaii:A, cephalothorax and cephalic appendages; B, first pereiopod; C, second pereiopod; D, third pereiopod; E, dactylus of third pereiopod; F, basis of fourth pereiopod, showing the epipod; G, fifth pereiopod; H, dactylus of fifth pereiopod. Scale bars: A = 1 mm; B–D, F, G = 0.5 mm; E, H = 0.2 mm. (ovigerous female, cl 5.7 mm, Sungai Stunggang, Sarawak, East Malaysia, ZRC).

Fig. 10. Caridina thambipillaii: A, cephalothorax and cephalic appendages; B, first pereiopod; C, second pereiopod; D, third pereiopod; E, dactylus of third pereiopod; F, endopod of male first pleopod; G, male second pleopod. Scale bars: A = 1 mm; B–D = 0.5 mm; E – G=0.2 mm. (male, cl 3.3 mm, Sungai Stunggang, Sarawak, East Malaysia, ZRC).