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Joffrichthys
Taxonomy
Joffrichthys was named by Li and Wilson (1996). It is not extant. Its type is Joffrichthys symmetropterus.
It was assigned to Heterotidinae by Newbrey and Bozek (2000); and to Osteoglossomorpha by Murray et al. (2018).
It was assigned to Heterotidinae by Newbrey and Bozek (2000); and to Osteoglossomorpha by Murray et al. (2018).
Species
Synonymy list
Year | Name and author |
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1996 | Joffrichthys Li and Wilson |
2000 | Joffrichthys Newbrey and Bozek p. 13 |
2018 | Joffrichthys Murray et al. |
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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.
G. †Joffrichthys Li and Wilson 1996
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†Joffrichthys symmetropterus Li and Wilson 1996
†Joffrichthys tanyourus Murray et al. 2018
†Joffrichthys triangulpterus Newbrey and Bozek 2000
Diagnosis
Reference | Diagnosis | |
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A. M. Murray et al. 2018 | Deep-bodied osteoglossomorph fishes with six hypurals, no epurals, one distinct uroneural, six pelvic fin rays, kidney-shaped opercle ornamented laterally with striations radiating from area of facet for articulation with hyomandibula,
and large dorsal and anal fins positioned posteriorly. Differs from Osteoglossidae and Notopteridae by having 18 principal rays (16 branched) in the caudal fin; from Notopteridae by lacking a long anal fin confluent with the caudal fin, and from Mormyridae by lacking the rounded snout, elongate jaw bones and other specializations of those families; from Hiodontiformes by lacking the posteriorly recurved spine on the opercle; and from basal members of the superorder by having the supraorbital sensory canal ending in the frontal not the parietal (which is similar to the more derived Osteoglossidae), and having the dorsal and ventral arms of the post-temporal equal in length (this last feature is probable, but not clearly visible in the type species). |
Measurements
No measurements are available
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Source: c = class, subp = subphylum | |||||
Reference: Carroll 1988 |
Age range: base of the Late/Upper Paleocene to the top of the Clarkforkian or 58.70000 to 55.80000 Ma
Collections (3 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Tiffanian | Canada (Alberta) | Osteoglossomorpha indet. (22732) | |
Late/Upper Paleocene | Canada (Alberta) | J. tanyourus (191920) | |
Clarkforkian | USA (North Dakota) | J. triangulpterus (21372) |