Crustacea Euphausiacea: Euphausiacés du Pacifique sud-ouest tropical (Nouvelle-Calédonie, îles Wallis et Futuna, Indonésie). Morphologie fonctionelle et biogéographie
Casanova, B. (1996). Crustacea Euphausiacea: Euphausiacés du Pacifique sud-ouest tropical (Nouvelle-Calédonie, îles Wallis et Futuna, Indonésie). Morphologie fonctionelle et biogéographie, in: Crosnier, A. (Ed.) Résultats des Campagnes MUSORSTOM 15. Mémoires du Muséum national d'Histoire naturelle. Série A, Zoologie, 168: pp. 167-195
In: Crosnier, A. (Ed.) (1996). Résultats des Campagnes MUSORSTOM 15. Mémoires du Muséum national d'Histoire naturelle. Série A, Zoologie, 168. Editions du Muséum: Paris. ISBN 2-85653-501-1. 539 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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| Abstract |
The inventory of epibenthic dredgings in the areas of New Caledonia, Indonesia and Wallis and Futuna Islands shows that there are 14 species of Euphausiids, of which Pseudeuphausia sinica is new for this region. Another species, Thysanopoda cornuta, sampling of which is always exceptional, leads the author to report on a closely related species, T. minyops, caught in the South of Madagascar and of which it is the second mention since its description. These two, giant, abyssal species are compared and original morphological features are described. In the Euphausiids, except petasma, modifications of the tegumental parts linked with reproduction only affect the segment bearing the gonopores, the coxae and sternites being involved in both sexes. In the females, the thelycum is a median unpaired specific modification of the sixth sternite articular sheet, partly closed by the coxal fold of the sixth thoracopods. The insertion of the spermatophores and their relation with the orifices of oviducts, situated beneath the coxae, helps in understanding the entirely external functioning of these seminal receptacles. A description of the antennular sensory setae is provided for the deep species Bentheuphausia amblyops. |
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