Oneirodes anisacanthus Regan 1925
Creators: name: Mincarone, Michael Maia
name: Afonso, Gabriel Vinícius Felix
name: Di Dario, Fabio
name: Eduardo, Leandro Nolé
name: Frédou, Thierry
name: Lucena-Frédou, Flávia
name: Bertrand, Arnaud
name: Pietsch, Theodore Wells
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Lophiiformes
Oneirodidae
Oneirodes
Oneirodes anisacanthus

description: Oneirodes anisacanthus Regan, 1925
(Figs. 1H, 4)
Diagnosis. Females of Oneirodes anisacanthus differ from those of its congeners, except O. plagionema, O. kreffti, O. posti, O. rosenblatti, O. dicromischus, O. luetkeni, O. carlsbergi, and those of the O. schmidti group, by the presence of a well-developed lateral escal appendage (vs. esca with lateral appendage minute or absent). Oneirodes anisacanthus differs from O. plagionema by the posterior escal appendage about onethird the length of escal bulb (vs. posterior escal appendage minute), anterior appendage anterodorsally directed, bearing numerous short filaments, and 2 unpigmented tapering filaments on anterior margin near the distal tip (vs. anterior appendage narrow, elongate, and anteroventrally directed, bearing a single short distal filament); from O. kreffti and O. posti by the esca without elongate medial appendages (vs. esca with 2 or 3 medial filaments more than twice the length of escal bulb); from O. rosenblatti and O. dicromischus by the lower jaw with fewer than 90 teeth in specimens greater than 45 mm, fewer than 60 teeth in specimens greater than 25 mm (vs. lower jaw with more than 90 teeth in specimens greater than 45 mm, more than 60 teeth in specimens greater than 25 mm), 3–9 (usually fewer than 8) teeth on vomer in specimens greater than 25 mm (vs. 8–14, usually more than 9 teeth); from O. luetkeni and O. carlsbergi by the presence of teeth on the epibranchial of the first gill arch (vs. epibranchial teeth absent); and from species of the O. schmidti group by the anterior escal appendage internally pigmented, anterolateral appendages absent (vs. anterior appendage without internal pigment, usually two pairs of filamentous anterolateral appendages) (Pietsch, 1974, 2009; Orr, 1991; Prokofiev, 2014a,b; Ho et al., 2016; Rajeeshkumar et al., 2017; Ho, Shao, 2019).
Geographical distribution. Oneirodes anisacanthus is widespread in the Atlantic Ocean, with records from off eastern Greenland, the Caribbean Sea, Madeira, Gulf of Guinea, and off Cape Town, South Africa (Pietsch, 1974, 2009). The two specimens collected around the Fernando de Noronha Archipelago and the seamounts off Rio Grande do Norte State, between depths of 505 and 1,030 m (Fig. 4), represent the first record of the species in Brazilian waters and in the western South Atlantic.
Material examined. NPM 4965, 1, 48 mm, RV Antea, sta. AB2/48A, 4°25’05.3”S 32°57’52.1”W to 4°25’24.9”S 32°56’55.5”W, 505 m, 30 Apr 2017, 10:30–10:58 h; NPM 4977, 1, 30 mm (Fig. 1H), RV Antea, sta. AB2/54B, 3°45’17.2”S 34°41’04.0”W to 3°44’39.2”S 34°40’04.5”W, 830–1,030 m, 3 May 2017, 13:11–13:47 h.
description: Published as part of Mincarone, Michael Maia, Afonso, Gabriel Vinícius Felix, Di Dario, Fabio, Eduardo, Leandro Nolé, Frédou, Thierry, Lucena-Frédou, Flávia, Bertrand, Arnaud & Pietsch, Theodore Wells, 2021, Deep-sea anglerfishes (Lophiiformes: Ceratioidei) from off northeastern Brazil, with remarks on the ceratioids reported from the Brazilian Exclusive Economic Zone, pp. 1-28 in Neotropical Ichthyology 19 (2) on pages 15-16, DOI: 10.1590/1982-0224-2020-0151, http://zenodo.org/record/11050422