Family Calappidae - box crabs

  Order
:
  Class
:
Malacostraca
  No. of Genera in Ref
:
  No. of Species in Ref
:
86
  Environment
:
Fresh : No | Brackish : No | Marine : Yes
  Aquarium
:
  First Fossil Record
:
     
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
:
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).
  Etymology
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  Division
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  Reproductive guild
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  Typical activity level
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  Main Ref
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  Coordinator
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Ref.
[ e.g. 9948]                       
Glossary
                    [ e.g. cephalopods]


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