New genera and new species of Hexapodidae (Crustacea, Brachyura) from the Indo-West Pacific and east Atlantic Author Rahayu, Dwi Listyo Author Ng, Peter K. L. text Raffles Bulletin of Zoology 2014 2014-07-04 62 396 483 journal article 10.5281/zenodo.5353945 2345-7600 5353945 4CF42744-861A-4635-9703-E6639CEBFAA9 Mariaplax mica , new species ( Figs. 1J , 37 , 38 ) Material examined. Holotype : female (6.7 × 4.5 mm ) ( NMCR 39069 ), PANGLAO 2005, station CP 2407, 9°41.3'N , 123°48.5'E , Bohol Sea , Philippines , coll. M/V BFAR , 204 –256m , 1 June 2005 . Diagnosis. Carapace subquadrate, about 1.5 times as broad as long; dorsal surface covered by tubercles; regions indistinct ( Fig. 37A ). Anterolateral margin arcuate; posterolateral corner with angled prominence over base of posterior pereopods ( Figs. 37A , 38A ). Eye small, slightly movable, cornea globular ( Fig. 37C ). Pterygostomial region with row of oblique striae ( Fig. 37B ). Third maxillipeds relatively broad, almost completely covering buccal cavity ( Figs. 37B , 38B ); ischium of third maxillipeds slightly expanded subproximaly, mesial margin oblique; combined length of dactylus, propodus and carpus shorter than that of merus and ischium; exopod narrow, 0.3 width of ischium, flagellum well developed. Chelipeds stout, unequal ( Fig. 37D ) pubescent, tuberculated; major chela with gap when fingers closed; minor chela with narrower gap between closed fingers. P2–P4 long, slender ( Fig. 37A ) covered by tubercles; merus of P4 3.6 times as long as broad; dactylus of P2 and P4 upcurved ( Fig. 37A ); outer surface of merus with longitudinal groove ( Fig. 37A ). Female thoracic sternum relatively broad ( Fig. 37B ), covered by tubercles; sternites 1 and 2 fused, separated from sternite 3 by distinct ridge; sternite 3 separated from sternite 4 by distinct tuberculate ridge laterally; sternoabdominal cavity not reaches base of sternite 3. Female abdomen wide ( Figs. 37B , 38C ); somites 1 to 6 free, telson with rounded distal margin. Colour. In life, pinkish brown overall, with the tubercles on the pereopods dark brown ( Fig. 1J ). Etymology. From Latin mica , tuberculate, alluding to the heavily granular carapace and pereopods. Name is used as a noun in apposition. Remarks. Mariaplax mica , new species , resembles M. cyrtophallus , new species , in the heavily granulated carapace and pereopods, a similar shape of the third maxilliped and the relatively long P2–P4. However, the carapace is distinctively more squarish in M. mica ( Figs. 37A ) while in M. cyrtophallus the anterolateral margin of the carapace is narrower, sloping to wider posterolateral margin ( Fig. 28A ). The P2–P4 are also proportionately longer and the granules on the carapace and pereopods are relatively larger in M. mica ( Figs. 37A , 38A versus Figs. 28A , 29I ). They also appear to have different depth preferences: M. mica was collected from more than 200 m while M. cyrtophallus was collected from shallow waters 15– 30 m . Type locality. Bohol Sea , Philippines . Distribution. Bohol Sea, Philippines . Deep water, 204– 256 m .