Ophiomyxidae Ljungman, 1867

Martynov, Alexander, 2010, Reassessment of the classification of the Ophiuroidea (Echinodermata), based on morphological characters. I. General character evaluation and delineation of the families Ophiomyxidae and Ophiacanthidae 2697, Zootaxa 2697, pp. 1-154: 103

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Ophiomyxidae Ljungman, 1867


Family Ophiomyxidae Ljungman, 1867  

Taxa of the family Ophiomyxidae   that have been questioned for ophiacanthid affinity

Paterson (1985) mentioned a close similarity between the ophiotomin Ophiotoma alberti   and the ophiomyxid Ophioscolex purpureus Düben & Koren, 1846   . The latter species has been treated together with few others as a separate subgenus Ophiolycus Mortensen, 1933   ( Mortensen, 1933b, 1936). McKnight (2003) elevated Ophiolycus   to genus rank, but this decision remained largely undiscussed. Besides the presence of distal hooks, Ophiolycus   has a number of differences from the type species of the genus Ophioscolex   , O. glacialis Müller & Troschel, 1842   : reasonably defined dorsal arm plates (except at proximal segments), elongated welldeveloped radial shield, thin skin layer, numerous disk scales, and arm spine articulations of the double opening type with a lateral lobe. Therefore Ophiolycus   is here also accepted as a separate genus. Stöhr & Segonzac (2005) have indicated that the ophiacanthid subfamily Ophiotominae  and the genus Ophioscolex Müller & Troschel, 1842   of the family Ophiomyxidae   is distinguished only by a few characters, but pending a revision they did not provide details. In order to compare and analyze these questioned taxa, diagnoses of both Ophioscolex   and Ophiolycus   are provided below.