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Crustacea Ascothoracida
Grygier, M.J. (1985). Crustacea Ascothoracida, in: Forest, J. (Ed.) Résultats des Campagnes MUSORSTOM I et II Philippines (1976, 1980). Tome 2. Mémoires du Muséum national d'Histoire naturelle. Série A, Zoologie, 133: pp. 417-426
In: Forest, J. (Ed.) (1985). Résultats des Campagnes MUSORSTOM I et II Philippines (1976, 1980). Tome 2. Mémoires du Muséum national d'Histoire naturelle. Série A, Zoologie, 133. Editions du Muséum: Paris. ISBN 2-85653-136-9. 525 pp., more
In: Mémoires du Muséum national d'Histoire naturelle. Série A, Zoologie. Editions du Muséum: Paris. ISSN 0078-9747, more
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  • Grygier, M.J.

Abstract
    Females and larvae of an ascothoracid crustacean, Endaster hamatosculum gen. et sp. nov., are described. They live in large cysts in arms of the sea-star Zoroaster carinatus philippinensis Fisher, 1916. The new genus belongs to the previously monotypic Ctenosculidae and is distinguished from Ctenosculum Heath, 1910, primarily by its wider than long, ellipsoidal carapace, and features of the thorax. The peculiar nauplii have well developed but uniramous antennae and mandibles, and the sexes are separable by the end of naupliar development. The first ascothoracid larva is more generalized than the same stage of other echinoderm-infesting ascothoracids. Endaster's possible utility as a model of the evolutionary grade between Ctenosculum and Ulophysema Brattstrom, 1936, is discussed.

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