A New Genus and Species of Rhynchonellid (Brachiopoda, Recent) from Submarine Caves in the Mediterranean Sea |
| |
| Authors: | Alan Logan Helmut Zibrowius |
| |
| Institution: | Marine research group, University of New Brunswick, Saint John, N.B. E2L 4L5, canada;Centre d'O?eanologie de Marseille, Universitéd'Aix-Marseille II, CNRS-URA 41, Station Marine d'Endoume, Rue Batterie des Lions, 13007 Marseille, France |
| |
| Abstract: | Abstract. A new rhynchonellid brachiopod genus Tethyrhynchia , with type species Tethyrhynchia mediterranea n. sp., is described from specimens discovered in dark zones of submarine caves along the Mediterranean coast of France between Marseille and La Ciotat, and also at Zembra Island, off the Gulf of Tunis, Tunisia. Other brachiopods occurring with this diminutive rhynchonellid are also small and include the megathyridids Argyrotheca cistellula and Megathiris detruncata . This is the first recorded occurrence of a rhynchonellid from the Mediterranean Sea. The new form is apparently neotenous, in that the lophophore in adults never develops beyond the trocholophous stage. A new type of rhynchonellid crus, crescentic in profile and here named the lunifer type, is described. The new genus is assigned to the new family Tethyrhynchiidae , and comparisons are made with other extant rhynchonellid genera. |
| |
| Keywords: | Rhynchonellid brachiopod Tethyrhynchia Recent caves Mediterranean Sea |
|
|
