Anatomie von Psammomacrostomum equicaudum Ax, 1966 (Turbellaria, Macrostomida) = Anatomy of Psammomacrostomum equicaudum Ax, 1966 (Turbellaria, Macrostomida)
Ax, P.; Faubel, A. (1974). Anatomie von Psammomacrostomum equicaudum Ax, 1966 (Turbellaria, Macrostomida) = Anatomy of Psammomacrostomum equicaudum Ax, 1966 (Turbellaria, Macrostomida). Mikrofauna des Meeresbodens, 48. Akademie der Wissenschaften und der Literatur: Mainz. ISBN 3-515-02036-5. 1-12 (415-424) pp.
Part of: Mikrofauna des Meeresbodens. Akademie der Wissenschaften und der Literatur: Wiesbaden. ISSN 0342-3247, more
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| Keywords |
Biology > Anatomy
Psammomacrostomum equicaudum Ax, 1966 [WoRMS]
Marine/Coastal |
| Abstract |
Psammomacrostomum equicaudum from the bay of Arcachon shows by means of several features characteristic adaptations to the interstitial environment: an extreme dorsoventral flattening off, a strong adhesive power, many touch bristles, and the development of a particular caudal touch thread as well as the lack of eyes. Within the genital system, the development of paired testicles and ovaries surely represents a plesiomorphous stage; the lack of an antrum femininum perhaps is to regard as an apomorphous character. An essential feature of the genus Psammomacrostomum is the protrudable ductus ejaculatorius, a cirrus internus, surrounded by a cirrus bag. This duplex-type of the male genital organ was unknown within the order Macrostomida. |
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