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PROC. BIOL. SOC. WASH. 107(1), 1994, pp. 185-192 DESCRIPTION OF THE NEW GENUS ALLOPATHES (CNIDARIA: ANTIPATHARIA) AND ITS TYPE SPECIES CIRRIPATHES DESBONNI Dennis M. Opresko and Stephen D. Cairns Abstract.— The rarely collected species originally described as Cirripathes desbonni is redescribed based on two specimens. A neotype is designated be-cause the type is presumed to be lost. A new genus, Allopathes, is proposed for this species based on its unusual colony form: numerous elongate, mostly unbranched stems originating from a short, trunk-like base. Antipathes robil-lardi Bell is also placed in this genus, which gives the genus a range of western Atlantic and Mauritius at 129-161 m. In September, 1989 the second author participated in a cruise of the Johnson-Sea-Link I research submersible (stations 2582-2595) off the southeastern coast of Louisi-ana. Eight species of Antipatharia were ob-served, photographed, and collected (Cairns et al. 1994), one of which was Allopathes desbonni. This species is composed of nu-merous long, slender, mostly unbranched stems arising from a stout, trunk-like base. We consider the distinctive nature of the corallum of this species and one other, A. robillardi, to justify establishing a new ge-nus, and include a redescription of the spe-cies. Allopathes, new genus Z)/(3gnc>5/5.— Corallum consisting of nu-merous elongate stems arising from a short trunk-like base. Stems generally straight but may be slightly coiled at their distal end; mostly unbranched, but occasionally with first and second-order branches arising from the lowermost parts of the stems. Spines typically arranged in verticils around cir-cumference of axis. Polyps in a single row along length of axis. Discussion. — As was noted by Duchas-saing & Michelotti (1864) the generic affin-ites of Cirripathes {=Allopathes) desbonni are not clearly defined. The individual stems resemble those of Cirrhipathes and Stichop-athes, and the arrangement of the polyps in a single row would tend to associate the species more with Stichopathes. The latter was treated as a subgenus of Cirrhipathes by some (e.g.. Van Pesch 1914). However, the morphology of the spines of Allopathes, and its tendency to develop long branches, would suggest an affinity with Antipathes verticillata (Brook 1889). Placing Antipathes desbonni in Stichopathes or Cirrhipathes would substantially alter the major diag-nostic character of those genera, i.e., the un-branched growth form of the corallum, which we do not believe to be justified. Likewise, placing^, desbonni in Antipathes would diminish the significance of the unique morphology of the corallum. Al-though the genus Antipathes currently is a heterogeneous assemblage of species, it is our view that natural groupings of species tend to center around distinct types of skel-etal morphology which, when evaluated in association with characteristics of the spines and polyps, are likely to define generic or subgeneric taxa. Therefore, we consider it appropriate to establish a new genus for des-bonni and also include in it Antipathes robil-lardi Bell, 1891. Etymology. —From Greek alios, other +

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Description Of The New Genus Allopathes (Cnidaria, Antipatharia) And Its Type Species Cirripathes Desbonni

D M Opresko and S D Cairns
Proceedings of The Biological Society of Washington 107: 185-192 (1994)

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