LOUWOICHTHYIFORMES, Xu, 2021
publication ID |
A36D3168-02CE-4D98-BF42-5ED7B61D4F47 |
publication LSID |
lsid:zoobank.org:pub:A36D3168-02CE-4D98-BF42-5ED7B61D4F47 |
persistent identifier |
https://treatment.plazi.org/id/03C687FC-FF9E-FFC6-FF51-7536FE07C900 |
treatment provided by |
Felipe |
scientific name |
LOUWOICHTHYIFORMES |
status |
ord. nov. |
LOUWOICHTHYIFORMES ORD. NOV.
Diagnosis: Stem group of neopterygians distinguished from other members of this clade by the following combination of features (autapomorphies identified with an asterisk): single suborbital confined between dermosphenotic and preopercle or lost; maxilla relatively short and deep, ending at level of the posterior orbital margin; presence of teeth only on anterior half portions of both jaws; preopercle anteriorly inclined, contacting maxilla anteriorly (*); posttemporal relatively narrow, not reaching median line; branchiostegal rays relatively few, two or three pairs in number; five or more caudal fin rays in epaxial portion; subopercle slightly larger than opercle, with prominent anteroventral extension (*); and 1:1 ratio of distally segmented fin rays to endoskeletal radials in dorsal and anal fins.
Content: Louwoichthyidae and Pseudobeaconiidae López-Arbarello & Zavattieri, 2008 .
Type family: Louwoichthyidae .
Geographical distribution and age: Luoping and Luxi, Yunnan, China ; Monte San Giorgio area , Switzerland ; Perledo and Ca’ del Frate, Italy; Mendoza, Argentina ; Middle to Late Triassic.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.