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Mendocinichthys brevis

Actinopteri - Perleidiformes

Taxonomy
Mendocinia brevis was named by Bordas (1944) [The holotype MACN 15350 was erroneously labelled as MACN 15351 in the figure caption of the original reference (Bordas 1944)]. Its type specimen is MACN 15350 (Lectotype), a set of postcrania (complete postcranium lacking the skull), and it is a compression fossil. Its type locality is El Challao, which is in a Norian fluvial-lacustrine shale in the Potrerillos Formation of Argentina. It is the type species of Mendocinichthys, Mendocinia.

It was recombined as Mendocinichthys brevis by Whitley (1953), López-Arbarello and Zavattieri (2008) and López-Arbarello et al. (2010).

Synonymy list
YearName and author
1944Mendocinia brevis Bordas
1953Mendocinichthys brevis Whitley p. 134
1955Mendocinia brevis Schaeffer p. 4
2008Mendocinichthys brevis López-Arbarello and Zavattieri p. 1041
2010Mendocinichthys brevis López-Arbarello et al. pp. 259-260 figs. Text-figure 8

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
RankNameAuthor
Osteichthyes()
superclassActinopterygii(Cope 1887)
classActinopteri()
subclassChondrostei(Müller 1844)
orderPerleidiformesBerg 1937
genusMendocinichthysWhitley 1953
speciesbrevis(Bordas 1944)

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
B. Schaeffer 1955Same as for genus.
A. López-Arbarello and A. M. Zavattieri 2008A small actinopterygian of c. 30 mm SL and maximum body depth c. 0.5 SL; dorsal and anal fins of similar size; dorsal fin with five basal fulcra and 12 lepidotrichia, the basal segments of which are very high, about six times higher than the distal segments; caudal
fin with 25 lepidotrichia, eight epaxial fin rays, three dorsal and three ventral basal fulcra; basal segments of epaxial caudal fin rays relatively and absolutely longer than the equivalent elements in the hypaxial rays; dorsal ridge with six spiniform scales; four large median scutes on dorsal midline from end of dorsal to caudal fin.
A. López-Arbarello et al. 2010Small pseudobeaconiids of about 30 mm SL and maximum body depth about 0.5 SL; dorsal and anal fins of similar size; dorsal fin with five basal fulcra and 12 lepidotrichia, the basal segments of which are very high, about six times higher than the distal segments; caudal fin with 25 lepidotrichia, eight epaxial fin rays, three dorsal and three ventral basal fulcra; basal segments of epaxial caudal fin rays relatively and absolutely longer than the equivalent elements in the hypaxial rays; dorsal ridge with six spiniform scales; four large median scutes on dorsal midline from end of dorsal to caudal fin (from
López-Arbarello and Zavattieri 2008).