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Family Calappidae - box crabs
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Order |
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Class |
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Malacostraca |
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No. of Genera in Ref. |
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No. of Species in Ref. |
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86 |
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Environment |
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Fresh : No |
Brackish : No |
Marine : Yes |
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Aquarium |
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First Fossil Record |
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Ref.. De Grave, S., N. Dean Pentcheff, S.T. Ahyong, T.-Y. Chan, K.A. Crandall, P.C. Dworschak, D.L. Felder, R.M. Feldmann, C.H.J.M. Fransen, L.Y.D. Goulding, R. Lemaitre, M.E.Y. Low, J.W. Martin, P.K.L. Ng, C.E. Schweitzer and S.H. … Tan 2009 | ||
Remark |
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Carapace strongly convex, transversely subovate anterior and lateral margins forming a single arc; frontal margin triangular, narrow; posterolateral parts forming clypeiform expansions over the legs, ending in broader or narrower teeth. Merus of third maxillipeds distinctly triangular; opening for afferent respiratory current at base of chela, no canal present along sides of buccal cavern even when third maxillipeds pushed aside. Chelipeds large and flattened, in a flexed position fitting exactly against the front of the body, eyes just looking over them; palm of chelae with high dorsal cock’s comb-like crest; right (larger) chela with special tooth on base of pollex for peeling gastropods; last 4 pairs of legs similar, smooth; dactyls without spines or hairs, not paddle-like. Male abdominal segments 3 to 5 completely fused. Burrowing crabs on soft and mud substrates. Most species of minor commercial importance (Ref. 104052). |
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Main Ref. |
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