Gymnodorvillea, Wainright and Perkins, 1982

de Oliveira Bonaldo, Rafael, Menchini Steiner, Tatiana, Senna Garraffoni, André Rinaldo & Zacagnini Amaral, Antônia Cecília, 2022, First record of the genus Eliberidens (Annelida: Dorvilleidae) from the Southwestern Atlantic Ocean and cladistic analysis of the genus, Zoologischer Anzeiger 301, pp. 115-126 : 116

Gymnodorvillea , iii) sister taxon of Meiodorvillea .

After the original description of these two species, no further studies were conducted to better understand its morphology and distribution. Although neither species present well-developed appendages, the taxon has unique morphological features related to chaetae (presence of a geniculate chaeta in first parapodia which develops in a furcate chaeta) and jaw apparatus (completely absence of superior and inferior maxillary plates) ( Wolf 1986a; Hilbig 1995).

This study registered the first occurrence of the genus Eliberidens from the Brazilian Southwestern Atlantic Ocean and the species E. forceps and E. hartmannschroederae , from 65 to 1023. 3 m deep. Both species were redescribed in order to improve the description and quantity of morphological data with detailed morphological information and images. Furthermore, a cladistic morphological analysis was performed to test the monophyly of Eliberidens and its relationship with closely related genera based on the study done by Eibye-Jacobsen & Kristensen (1994): Dorvillea Parfitt, 1866 , Gymnodorvillea Wainright and Perkins, 1982 , Meiodorvillea Jumars, 1974 , Marycarmenia Núnez ˜1998, Pettiboneia Orensanz, 1973 , Protodorvillea Pettibone, 1961 and Schistomeringos Jumars, 1974 .