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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Zoomorphology 72 (1972), S. 26-35 
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Von Proben aus dem Ross-Meer (Antarktis) liegen vier Echiurida-Kopflappen vor, welche zwei neuen Arten angehören: 1. Der Kopflappen von Binoraphorus geminolobotus n. g. n. sp. weist eine symmetrische Verdoppelung im Organaufbau auf, — einschließlich einer paarigen äuBeren Mundöffnung; der ventromediane Längssteg und die terminale Zweilappigkeit vertiefen die Besonderheiten des Zwillings-Kopflappen. 2. Die drei Kopflappen von Echiurus torulobotus n.sp. zeigen gleich jenen des arktisch-borealen E. echiurus einen proximalen medioventralen Wulst; die neue Art erweist sich jedoch im geographischen Vorkommen eindeutig abgegrenzt.
    Notes: Summary Samples from the Ross Sea (Antarctic) contained four prostomia (“probosces”) of Echiurida which belong to two new species: 1. The prostomium of Binoraphorus geminolobotus n. g. n. sp. shows a symmetrical arrangement of double organs. This unique dual prostomium is externally marked by two mouth openings, by a ventromedian ridge and by a bilobed distal end. 2. The typical echiurid prostomium of Echiurus torulobotus n. sp. possesses a proximal swelling similar to that of Echiurus echiurus. It must be stated, however, that the latter is without exception a boreal-arctic form, and the present prostomia belong therefore to a geographically separated species.
    Type of Medium: Electronic Resource
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