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[dinosaur] Hemilopas, new material for marine reptile from Middle Triassic of Poland + Frodoichthys and Gimlichthys





Ben Creisler
bcreisler@gmail.com



A new paper



Dawid Surmik  (2016)
Hemilopas mentzeli, an enigmatic marine reptile from the Middle Triassic of Poland revisited.
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 282(2): 209-223
DOI: https://doi.org/10.1127/njgpa/2016/0614 
http://www.ingentaconnect.com/content/schweiz/njbgeol/2016/00000282/00000002/art00007



New material from the Muschelkalk of Silesia, southern Poland, is described and attributed to Hemilopas mentzeli v. Meyer, 1851, a species previously considered a nomen dubium. It is here reinstated as a valid taxon on the basis of a newly presented neotype and specific diagnosis. A possible position of Hemilopas mentzeli in a phylogenetic tree of early diapsids, is discussed and its relationship with Saurosphargidae; a family of marine diapsids basal to Sauropterygia is hypothesized. A similar tooth morphology shared by different early diapsids is considered convergent.



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OK, not tetrapods, but note the names Frodoichthys and Gimlichthys...

Sun Zuo-Yu; Tintori, Andrea; Lombardo, Cristina; Jiang Da-Yong (2016)
New miniature neopterygians from the Middle Triassic of Yunnan Province, South China.
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 282(2): 135-156
 DOI: https://doi.org/10.1127/njgpa/2016/0610 
http://www.ingentaconnect.com/content/schweiz/njbgeol/2016/00000282/00000002/art00003


Two new miniature (small to very small fishes being less than 4 cm in total length) neopterygians, Frodoichthys luopingensis gen. et sp. nov. and Gimlichthys dawaziensis gen. et sp. nov., from the vertebrate horizon in the upper member of the Guanling Formation (Anisian, Middle Triassic) near Dawazi village, Luoping County, Yunnan Province, South China, are described. A detailed comparison with the major clades of the Neopterygii and known miniature neopterygian incertae sedis well support the erection of these new taxa. Pending a sound phylogenetic analysis, we tentatively propose to place them as incertae sedis within Neopterygii with Frodoichthys gen. nov. being more similar to Prosantichthys and thus to the halecomorph order Panxianichthyformes and Gimlichthys gen. nov. being more similar to ginglimodians than to halecomorphs. The new taxa, together with previously recorded Anisian neoptergygians support the Anisian neopterygian radiation that possibly took place in the East Tethys earlier than previously suggested in the West Tethys. Thus, the new taxa are key forms for a better understanding of basal nodes within halecomorphs and ginglymodians.