Hemipholis Lyman, 1865,

Alitto, Renata A. S., Bueno, Maristela L., Guilherme, Pablo D. B., Domenico, Maikon Di, Christensen, Ana Beardsley & Borges, Mic, 2018, Shallow-water brittle stars (Echinodermata: Ophiuroidea) from Araçá Bay (Southeastern Brazil), with spatial distribution considerations, Zootaxa 4405 (1), pp. 1-66: 46

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Hemipholis Lyman, 1865


Genus Hemipholis Lyman, 1865 

Type taxon. Hemipholis cordifera ( Bosc, 1802)  , originally described as Asterias cordifera  .

Diagnosis. Disc regularly covered with scales dorsally and naked ventrally, with soft interradial recesses. Absence of bursae. Radial shields partially joined. One lateral oral papilla. Adoral shields all in contact, forming a continuous ring around the mouth. One tentacle scale. Three pointed arm spines ( Lyman 1865; Fell 1960; Tommasi 1970; Albuquerque 1986).

Comments. Hemipholis  shares features with Ophiactis  , such as a ring of contiguous adoral shields and the presence of hemoglobin containing coelomocytes in its water vascular system ( Christensen et al. 2008), suggesting a close systematic relationship between both genera ( Hendler 2011). Hemipholis  is well-studied and has repeatedly been cited in ecological, environmental, and biological studies owing to its abundance, broad geographic range, and its remarkable morphological and physiological specializations ( Hendler et al. 1995; Hendler 2011). Currently, two species are accepted in Hemipholis ( Stöhr et al. 2016)  , with one recorded from Brazil ( Barboza & Borges 2012): Hemipholis cordifera ( Bosc, 1802)  .