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Mendocinichthys brevis
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).
It was recombined as Mendocinichthys brevis by Whitley (1953), López-Arbarello and Zavattieri (2008) and López-Arbarello et al. (2010).
Synonymy list
| Year | Name and author |
|---|---|
| 1944 | Mendocinia brevis Bordas |
| 1953 | Mendocinichthys brevis Whitley p. 134 |
| 1955 | Mendocinia brevis Schaeffer p. 4 |
| 2008 | Mendocinichthys brevis López-Arbarello and Zavattieri p. 1041 |
| 2010 | Mendocinichthys brevis López-Arbarello et al. pp. 259-260 figs. Text-figure 8 |
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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.
†Mendocinichthys brevis Bordas 1944
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. Schaeffer 1955 | Same as for genus. | |
| A. López-Arbarello and A. M. Zavattieri 2008 | A 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. 2010 | Small 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). |