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Dinematichthys midwayensis

Actinopteri - Ophidiiformes - Bythitidae

Taxonomy
Dinematichthys midwayensis was named by Nolf and Dockery (1993). Its type specimen is IRSNB P 6109, an otolith, and it is a 3D body fossil. Its type locality is Matthews Landing, which is in a Selandian coastal marl in the Porters Creek Formation of Alabama.

Synonymy list
YearName and author
1993Dinematichthys midwayensis Nolf and Dockery p. 30 figs. pl. 4, figs. 4, 5

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
superclassActinopterygii(Cope 1887)
classActinopteri()
subclassNeopterygii(Regan 1923)
Teleosteomorpha
Teleostei(Müller 1846)
Osteoglossocephalai
RankNameAuthor
ClupeocephalaPatterson and Rosen 1977
Euteleosteomorpha
NeoteleosteiRosen 1973
Eurypterygia(Rosen 1973)
Ctenosquamata
Acanthomorphata(Rosen 1973)
Euacanthomorphacea
Percomorphaceae
Ophidiimorpharia
orderOphidiiformesBerg 1937
suborderBythitoidei
familyBythitidaeGill 1861
genusDinematichthysBleeker 1865
speciesmidwayensis

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
D. Nolf and D. Dockery 1993This species is characterized by robust, but not very thick, otoliths. Their outline is elongate and regularly elliptical, except for a slightly hollow ostial rim. The outer face is smooth and clearly convex; the inner face is also convex, the mc;>st marked convexity being situated in the dorso-ventral direction.
The sulcus does not open directly on the ostial rim, and consists of a broad ostium and a small narrow cauda. The ostiumisaboutthreetimesaslongasthecauda,andabouttwo times as broad. Both ostium and cauda have extremely flattenedcolliculathatliedeeperthanthemaininnersurface of the otoliths. One observes no clear ostial channel, but the positionofsuchachannelismarkedbyacrest-likestructure linking the anteriorpartoftheostium with the ostial rim. The crest probably corresponds to the dorsal boundary of the ostial channel. There is a well marked ventral furrow, and a slight longitudinal depression is observed in the dorsal area.