The one family was once placed in the Lampriformes (e.g., Nelson, 1976, 1984), and interestingly, the molecular work of Miya et al. (2003) found support for it being the sister group of the Lampriformes with both being sister to the Myctophiformes. More work is needed to test these hypotheses of relationships.
Family ATELEOPODIDAE (183)—jellynose fishes. Marine; Caribbean Sea, eastern Atlantic, Indo-West Pacific, and eastern Pacific off Panama and Costa Rica.
Caudal fin reduced, united, except in Guentherus, with the long anal fin; anal fin rays 70 or more; pelvic fin of adults with single elongate ray on throat (young specimens have up to 10 rays); dorsal fin short-based with 3-13 rays (usually 9-13); skeleton largely cartilaginous; snout bulbous; branchiostegal rays 7. Maximum length about 2 m.
Four genera, Ateleopus, Ijimaia, Parateleopus, and Guentherus, with about 12 species (e.g., Smith and Heemstra, 1986; Moore, 2003). As noted by Moore (2003), the family is in great need of revision.
Eurypterygii (eurypterygians) . The remaining six superorders of neoteleosts compose Rosen's (1973a) Eurypterygii. Rosen recognized two subsections, the Cyclosquamata for the Aulopiformes and the Ctenosquamata for the higher eurypterygians. The sister-group relationships of the Cyclosquamata and Ctenosquamata were accepted by Fink and Weitzman (1982) and by Lauder and Liem (1983), and Stiassny (1986) and Johnson (1992) supported a monophyletic Eurypterygii as viewed by Rosen (1973a). However, many of Rosen's (1973a) synapomorphies for the Eurypterygii seem not to be valid for recognizing monophyly, and Johnson (1992) gave three synapomorphies that he considered valid (the most convincing being the fusion of the base of the ventral hemitrich of the medial pelvic fin ray to the medial pelvic radial). Miya et al. (2003), in their study using mitochondrial sequences, supported eurypterygian monophyly. The term "inioms" in the past has been used to include species of the two orders Aulopiformes and Mytophiformes; this term is no longer used as it does not reflect a monophyletic group (see Nelson, 1994, for further details).
A fossil taxon not otherwise mentioned, included as incertae sedis, is the Cheirotricidae (Patterson, 1993).
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