Australian Biological Resources Study

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Subfamily Thalassograpsinae Davie & Ng, 2007

  • 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.

 

History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
04-Jun-2012 04-Jun-2012 MOVED
26-Mar-2012 ADDED