A new species of micro-mangrove crab of the genus Haberma Ng & Schubart, 2002 (Crustacea, Brachyura, Sesarmidae) from Hong Kong.

Stefano Cannicci,Peter L K Ng

doi:10.3897/zookeys.662.11908

Abstract

The sesarmid genus Haberma Ng & Schubart, 2002, currently contains two species of small mangrove crabs with the first two pairs of the male ambulatory legs possessing characteristic subchelate dactyli and propodi. A new species, H. tingkok, is here described from Hong Kong. It can be separated from H. nanum Ng & Schubart, 2002 (from Singapore), and H. kamora Rahayu & Ng, 2005 (from Indonesian Papua) by its carapace shape, proportions of the ambulatory legs, and structures of the male pleon and male first gonopod.

Highlights

The genus Haberma was established by Ng and Schubart (2002) for a small species of mangrove sesarmid crab from Singapore, H. nanum; and was characterised by an entireCopyright Stefano Cannicci, Peter L
Width ca. 1.03–1.04 times length (Figs 1A, 2, 3A); margin of each frontal lobe with broadly convex margin (Figs 2, 3A); supraorbital margin relatively long, gradually sloping laterally (Fig. 3A); external orbital tooth directed anteriorly, lateral carapace margin gently sinuous, subparallel (Fig. 3A); tip of cornea reaching tip of external orbital tooth (Fig. 3A, C); dorsal surface of dactylus of chela with several small, low, irregularly arranged subtransverse striae (Fig. 3D); ambulatory legs (P2–P5) very long, slender, propodi of P2 and P3 elongate (Figs 4D, E); male pleon triangular, telson semicircular (Figs 3B, 4F); G1 relatively slender, gently curving outwards; apical process bent, with truncate tip (Fig. 4H–L)
Surface of male thoracic sternites 1–3 setose, others smooth, glabrous; sternites 1–3 fused; sternites 3 and 4 separated by very low ridge lined with long setae that obscure margins (Figs 3B, 4G)

Summary

Introduction

The genus Haberma was established by Ng and Schubart (2002) for a small species of mangrove sesarmid crab from Singapore, H. nanum; and was characterised by an entireCopyright Stefano Cannicci, Peter L. Haberma nanum Ng & Schubart, 2002: Holotype ♂ (7.1 × 6.6 mm) (ZRC 2002.217), Mandai mangroves, Singapore, coll.

Results

Conclusion