Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Alepisauroidei

Actinopteri - Aulopiformes

Synonymy list
YearName and author
1990Alepisauroidei Nolf and Dockery III p. 6
2006Alepisauroidei Prokofiev p. S44
2013Alepisauroidei Betancur-R. et al.
2016Alepisauroidei Nazarkin p. 830
2017Alepisauroidei Holloway et al. p. 605

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
superclassActinopterygii(Cope 1887)
classActinopteri()
subclassNeopterygii(Regan 1923)
RankNameAuthor
Teleosteomorpha
Teleostei(Müller 1846)
Osteoglossocephalai
ClupeocephalaPatterson and Rosen 1977
Euteleosteomorpha
NeoteleosteiRosen 1973
Eurypterygia(Rosen 1973)
Aulopa
orderAulopiformesRosen 1973
suborderAlepisauroidei
suborderAlepisauroidei

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
A. M. Prokofiev 2006Fish of different size (from 15 cm to 2 m SL), usually with significantly elongated, sometimes snake-like body. Snout compressed laterally, mouth very large. Supramaxillaria 0–1, if present, small and narrow. Maxillare narrow, long, not broadened cau- dally, not supported by infraorbitalia. Teeth in jaws acicular or fanglike, in one row; several powerful fangs on the palatinum. No supraorbitale and antorbitale; infraorbital bones reduced in size. Posttemporal fossa absent. The reduction of the horizontal praeoperculum branch differs; interoperculum, operculum, and often suboperculum reduced. Branchiostegal rays 6–10. Gill rakers reduced. Cleithrum attached to the upper half or middle of supracleithrum. Vertebral number 50–ca 186. Caudal part of the vertebral column significantly larger than the abdominal part. Intermuscular bones are very well developed, hypertrophied. Caudal fin and its skel- eton may be reduced (Polymerichthyidae); the structure of the caudal skeleton varies widely in different fami- lies (Borodulina, 1985). Dorsal fin in most families either has very long base, significantly exceeding a half of the body length or shifted to the posterior part of the body or absent (except Omosudidae, Evermanellidae, and Scopelarchidae). There are 13–50 (in Polymerich- thyidae, probably more) rays in the anal fin. Pectoral fin forms an angle of more than 45° with the body, attaches to the body below or at its ventral margin. Pelvic fins sugnificantly shorter than pectoral, sometimes absent. Scale cover reduced to various degrees or absent com- pletely, no fulcral scales in the caudal fin base. Lumines- cent organs usually absent, except certain Paralepididae; however, their inner morphology in the latter significantly differs from that in Myctophoidei (Anderson et al., 1966). No swimbladder; there are discrete peritoneal sections (except Scopelarchidae). Eyes without afocal zone. Mostly meso- and bathypelagic fish inhabiting depths up to 2500 m; some species perform interzonal migrations.