Biodiversity of bathyal coral gardens – portrait of a uniserial bryozoan endemic to the South Azorean Seamount Chain: an unexpected evolutionary testbed?
Zoosystema 46
(30)
On slopes of the bathyal zone, branched scleractinian corals produce three-dimensional constructions and rubble which provide hard substrates particularly suitable for encrusting bryozoans. Samples of “cold water corals”, mainly Madrepora oculata Linnaeus, 1758, collected on six seamounts of the South Azorean Seamount Chain (SASC), allowed a close re-examination of a poorly-known uniserial encrusting cheilostome bryozoan, Harmelinius uniserialis (Harmelin, 1978), revealing unexpected morphological features. In contradistinction to the apparent simplicity of its colony shape formed by ramifying chains of autozooids and vicarious kenozooids, this species presents a great structural complexity shaped by different types of polymorphs.
Notes on the taxonomy of Frevillea A. Milne-Edwards, 1880 (Crustacea, Brachyura, Goneplacoidea), with the description of a new genus for F. sigsbei A. Milne-Edwards, 1880
Zoosystema 46
(29)
The identities of the Western Atlantic brachyuran crabs Frevillea barbata A. Milne-Edwards, 1880, F. rosaea A. Milne-Edwards, 1880, F. tridentata A. Milne-Edwards, 1880, and F. sigsbei A. Milne-Edwards, 1880, originally placed in Goneplacidae MacLeay, 1838, are clarified on the basis of the examination of type material as well as of additional specimens. The correct identity of the type material of the four species is resolved. A new genus, Diuplax n. gen., is described for F. sigsbei, which had previously been transferred to Goneplax Leach, 1814 (family Goneplacidae).