Epigean And Hypogean Freshwater Shrimps Of Bohol Island, Central Philippines (Crustacea: Decapoda: Caridea) Cai, Yixiong Choy, Satish Ng, Peter K. L. Raffles Bulletin of Zoology 2009 2009-02-28 57 1 65 89 8VK4M Cai & Choy & Ng, 2009 Cai & Choy & Ng 2009 [263,446,827,851] Malacostraca Atyidae Caridina GBIF Animalia Decapoda 15 80 Arthropoda species batuan sp. nov.  ( Fig. 10)   Material examined. –  Holotype: Ovigerous female, cl 4.2 mm, eggs 0.8 × 0.5 mm, USC, Cave Castigio, Batuan, coll. B. Sket,  Feb.1995.   Paratypes: Onemale, cl 4.1 mm, ZRC 2007.0299, same data as holotype; 4 males, cl 2.2–3.7 mm, 5 females, cl 2.5–3.6 mm,  4 juveniles, UOL, Cave Kalumpan, Behind-the-Clouds, Batuan, coll. B. Sket,  Feb.1995;  1 female, 1 juvenile, UOL, Spring Badyang, cave, Valencia, coll. B. Sket,  Feb.1995;  2 females, cl 1.9–2.3 mm, ZRC 2007.0300, Cave Bonugan, Batuan, coll. B. Sket,  Feb.1995;  2 juveniles, UOL, Alijauan Bridge, stream, S. Duero, coll. B. Sket,  5 Mar.1999.   Description. –Rostrum ( Fig 10A) short, reaching slightly beyond end of basal segment of antennular pedunlcle; rostral formula: 0–2+7–12/0–4. Antennal spine distinct, fused with inferior orbital angle. Pterygostomian margin broadly rounded. Sixth abdominal somite 0.50 times of carapace, 1.9 times as long as fifth somite, slightly shorter than telson. Telson ( Fig. 10B, C) 2.9 times as long as wide, not terminating in a projection, with 4 or 5 pairs of dorsal spinules and 1 pair of dorsolateral spinules; lateral pair of spines distinctly longer than intermediate pairs. Preanal carina low, sub-triangular, lacking spine. Eyes reduced, anterior end reaching to 0.4 times length of basal segment of antennular peduncle. Antennular peduncle 0.63 times as long as carapace; basal segment of antennular peduncle shorter than both second and third segment lengths, anterolateral angle reaching 0.20 times length of second segment, second segment distinctly longer than third segment. Stylocerite reaching to 0.7 times length of basal segment of antennular peduncle. Scaphocerite 3.4 times as long as wide. Incisor process of mandible ending in irregular teeth, molar process truncated. Lower lacinia of maxillula broadly rounded, upper lacinia elongated, with a number of distinct teeth on inner margin, palp slender. Upper endites of maxilla subdivided, palp short, scaphognathite tapering posteriorly with some long, curved setae at posterior end. Palp of first maxilliped rounded. Podobranch of second maxilliped reduced to a lamina. Third maxilliped reaching to end of scaphocerite, with ultimate segment as long as penultimate segment. Epipods on first 4 pereiopods. First pereiopod ( Fig. 10D) reaching end of antennular peduncle; merus 2.1 times as long as broad, slightly shorter than carpus; carpus excavated anteriorly, shorter than chela, 1.6 times as long as high; chela 2.1 times as long as broad; fingers slightly shorter than palm. Second pereiopod ( Fig. 10E) reaching beyond end of scaphocerite by length of chela; merus distinctly shorter than carpus, 4.5 times as long as broad; carpus 1.3 times as long as chela, 5.3 times as long as high; chela 2.6 times as long as broad; fingers 1.3 times as long as palm. Third pereiopod ( Figs. 10F, G) reaching beyond end of scaphocerite by length of dactylus and half of propodus, propodus 11 times as long as broad, 4.3 times as long as dactylus; dactylus 3.3 times as long as wide (spines included), with 4 or 5 accessory spines on flexor margin. Fifth pereiopod ( Figs. 10H, I) reaching beyond end of scaphocerite by length of dactylus, propodus 15 times as long as broad, 4.4 times as long as dactylus, dactylus 3.7 times as long as wide (spinules included), terminating in 1 claw, with 44 spinules on flexor margin. Endopod of male first pleopod sub-triangular, a quarter length of exopod, no appendix interna. Appendix masculina of male second pleopod half length of endopod, with appendix interna half length of appendix masculina, reaching near end of appendix masculina. Uropodal diaeresis ( Fig. 10J) with 20 movable spinules. Ovigerous females with eggs sized 0.80 × 0.50 mm.   Habitat. – Caridina batuan, new species, was collected from several caves in southern part of the BoholIsland, central Philippines.   Etymology. –The new species is named after its typelocality- Batuan, BoholIsland, the Philippines. The name is used as a noun in apposition.    Remarks. – Caridina batuan, new species, is morphologically similar to  C. minidentataCai & Anker, 2004, from west Samar, the Philippines. However, it can be distinguished from  C. minidentataby the more developed rostral teeth, the much reduced eyes, the lower preanal carina and the larger number of spinules on diaeresis (20 vs. 16) ( Fig. 10; cf. Cai & Anker, 2004: Figs. 4, 5). 1995-02 B. Sket Cave Castigio 15 80 1 holotype 1995-02 ZRC B. Sket One 15 80 ZRC 2007.0299 1 paratype 1995-02 B. Sket Batuan Cave Kalumpan Behind-the-Clouds 15 80 4 4 paratype 1995-02 Valencia & B. Sket Spring Badyang 15 80 2 1 1 paratype 1995-02 ZRC Batuan & B. Sket Cave Bonugan 15 80 ZRC 2007.0300 2 2 paratype 1999-03-05 S. Duero & B. Sket Alijauan Bridge 15 80 2 2 paratype