Subfamily Thalassograpsinae Davie & Ng, 2007

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Regional Maps

• Thalassograpsinae Davie & Ng, 2007.

Diagnosis

Carapace glabrous, flat, regions moderately defined; anterolateral margins with 3 teeth including exorbital angle; posterior margin convex; no raised line on the branchial region defining posterolateral facet. Front deflexed; broad, less than half maximum carapace breadth; broadly bilobed, but with short distinct lateral sulcus adjacent to inner orbital edge, such that the frontal and supra-orbital margins are not continuous. Orbits open laterally; sub-orbital crest relatively straight, extending short distance across lateral branchial region, stridulatory against inner edge of cheliped merus; pterygostomial grooves opening into anterolateral corner of buccal cavity; pterygostome non-setose, lacking vertical groove subparallel to buccal cavity. Third maxillipeds with subtriangular ischium, with a faint longitudinal sulcus; merus subquadrate without convex lateral margins; almost no gape when closed; exopod narrow. Endostome granular, medially prominent, very narrow. Chelipeds usually subequal, large in size. Ambulatory legs flat, dorso-ventrally flattened; posterodistal border of propodus of walking legs with subapical spine. Thoracic sternites 3 and 4 flat, broad; Sternite 3 lateral margins relatively straight; the suture of thoracic sternite 3/4 not visible (vs. slightly visible in all other subfamilies); and medial groove in thoracic sternites 7, 8 proportionately wide. Male gonopores fully sternal. Abdomen with segments 5, 6 functionally fused, although suture still present.

Diagnosis References

Davie, P.J.F. & Ng, N.K. 2007. Two new subfamilies of Varunidae (Crustacea: Brachyura), with description of two new genera. Raffles Bulletin of Zoology Supplement 16: 257-272 [258]

History of changes