chiton

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Related to Polyplacophora: class Polyplacophora, Chitons

chiton

the common name for any member of the class Polyplacophora (= Loricata) - primitive molluscs which have a creeping foot and a dorsal shell formed of a series of plates (usually 8).
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The shallow-water Polyplacophora of the Azores and some comments on the biogeographical relationships of the Azorean malacofauna.
Whereas in none of the Gastropoda the mesentoblast is formed later than the 63-cell stage, in the more primitive Polyplacophora, such as Ischnochiton (Heath 1899) and Acanthochiton (van den
Se identificaron 229 especies correspondientes a 11 Filos: Annelida (Polychaeta), Arthropoda (Pycnogonida, Malacostraca, Ostracoda), Bryozoa, Chordata (Ascidiacea), Cnidaria (Anthozoa, Hydrozoa), Echinodermata (Echinoidea, Ophiuroidea, Holothuroidea, Asteroidea), Mollusca (Gastropoda, Bivalvia, Polyplacophora, Cephalopoda, Scaphopoda), Nemertea (Anopla, Enopla), Platyhelminthes, Porifera y Sipuncula, todos son grupos representativos de comunidades bentonicas costeras (Tabla 1, Apendice I).
All primary types of Polyplacophora discussed and illustrated here, were photographed during the ongoing revision of the type material deposited in the KwaZulu-Natal Museum.
Hubo varias familias (Buccinidae, Bullidae, Cerithiidae, Columbellidae, Cypraeidae, Diogenidae, Mithracidae, Modullidae, Muricidae, Ophiothricidae, Paguridae, Polyplacophora, Rissoidae, y Thaidinae) cuya contribucion porcentual fue muy baja (1-2%), y que ademas solo se presentaron en uno o dos meses de muestreo.
More usually, Aplacophora was placed with the Polyplacophora as Aculifera or Amphineura (see especially Hoffman, 1949).
Systematics, phylogeny and biology of Polyplacophora.
Outside the Bivalvia, calcified spikes are known to occur in the cuticles of Aplacophora and Polyplacophora.
This fauna consists of 8 faunistic groups (Bivalvia, Gastropoda, Polyplacophora, Sipunculoida, Crustacea, Polychaeta, Echinoderma, and fish).
1 0,4 0,5 Prisogaster niger (Wood, 1828) 1,2 2,1 Scurria scurra (Lesson, 1831) 23,8 9,3 Scurria variabilis (Sowerby, 1839) 0,2 0,4 Scurria viridula (Lamarck, 1822) 0,2 0,4 Tegula atra (Lesson, 1830) 2,9 6,3 Tegula luctuosa (d'Orbigny, 1841) 0,5 1,1 Polyplacophora Acanthopleura echinata (Barnes, 1824) 0,5 0,7 Chaetopleura peruviana (Lamarck, 1819) 0,7 1,6 Chiton granosus Frembly, 1827 Chiton magnificus Deshayes, 1827 Chitonidae indet.