A new genus and species of pinnotherid crab from Karachi, northern Arabian Sea (Crustacea, Decapoda, Brachyura) Author KAZMI, Q. B. Marine Reference Collection & Resource Centre, University of Karachi, Karachi- 75270, Pakistan Author MANNING, R. B. Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA text Journal of Natural History 2003 2001-09-28 37 9 1085 1089 http://www.tandfonline.com/doi/abs/10.1080/00222930110108353 journal article 7427 10.1080/00222930110108353 64fed6a7-107a-424d-a7b9-5e2173e2e308 1464-5262 4675206 Sindheres gen. nov. Diagnosis. Size small, carapace 3.25 mm long, 5.0 mm wide in a unique holotype . Carapace sub-hexagonal, narrowing anteriorly, width greater than length, width greatest posterior to mid-length; regions poorly defined. Front very slightly projecting. MXP3 exopod with flagellum; ischium and merus indistinguishably fused, elongate; inner margin convex; palp three-segmented; propodus spatulate, longer than carpus, dactylus styliform, inserted below mid-length of ventral margin of propodus. Walking legs equal right and left; WL2 longest of walking legs, WL1–3 dactyli similar, subequal, falcate, strongly curved to sharp apex; WL4 dactylus slightly shorter than dactyli of WL1–3. Female abdomen of seven free somites, abdomen extended beyond bases of legs. Male unknown. Type species. Sindheres karachiensis new species , by present designation and monotypy. Etymology. An arbitrary combination of the name of the Pakistan province of Sindh and the ending - eres . The gender is musculine. Remarks. Members of Sindheres can be distinguished at once from members of Pinnotheres Bosc, 1802 , in having the dactylus of MXP3 inserted near the midlength of the ventral margin of the propodus ( Manning, 1993 : figure 1 (c)), rather than at its base ( Manning, 1993 : figure 1 (b)). In this feature Sindheres resembles the eastern Atlantic Nepinnotheres Manning, 1993 , but in members of Nepinnotheres the carapace is sub-circular, with the length and width subequal, rather than subhexagonal, with the length much shorter than the width. In Sindheres , the mesial margin of the MXP3 ischium-merus is convex, whereas in N. pinnotheres the mesial margin of MXP3 is slightly concave proximally with an obtuse projection subdistally.