CTENELLA-AURANTIA, NEW GENUS AND NEW SPECIES OF MEDITERRANEAN TENTACLED CTENOPHORE (CTENELLIDAE FAM NOV) WITHOUT COLLOBLASTS, BUT WITH LABIAL SUCKERS - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE Année : 1993

CTENELLA-AURANTIA, NEW GENUS AND NEW SPECIES OF MEDITERRANEAN TENTACLED CTENOPHORE (CTENELLIDAE FAM NOV) WITHOUT COLLOBLASTS, BUT WITH LABIAL SUCKERS

Résumé

Ctenella aurantia gen. et sp.nov. is a small Mediterranean tentacled ctenophore. its ovoid and flattened body is opaque and yellow-orange, with red-pigmented areas. Comb rows are arranged in pairs from the apex to the oral third of the body. The tentacular sheaths situated at the end of the oral third of the body open medially; they terminate in an aboral open groove which can close up around the unramified tentacles. The gastrovascular system is simple and follows the axis of the body; it has no peripheral canals but two long apical canals project into the aboral zone. The mouth forms a sagittal slit bordered by two thick lips, each bearing a sucker on its internal wall. The species also possesses very distinctive cytological features, notably the absence of colloblasts on the tentacles and the consistent presence of exogenic cnidocysts that are embedded in the gastrovascular wall. The muscular cells of the oral zone have no sarcomeres, but have both fine and thick myofilaments that are arranged alternately. The species is very distinctive, both in its cytological characteristics and its general organization. It is tentatively classified in the order Cydippida, and its relationship to some other species is mentioned.

Domaines

Océanographie
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Dates et versions

hal-03476489 , version 1 (13-12-2021)

Identifiants

Citer

C Carre, D Carre. CTENELLA-AURANTIA, NEW GENUS AND NEW SPECIES OF MEDITERRANEAN TENTACLED CTENOPHORE (CTENELLIDAE FAM NOV) WITHOUT COLLOBLASTS, BUT WITH LABIAL SUCKERS. CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE, 1993, 71 (9), pp.1804-1810. ⟨10.1139/z93-257⟩. ⟨hal-03476489⟩
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