Batrachopus, , Olsen & Padian, 1986

Moreau, Jean-David, Vullo, Romain, Bichr, Elsie, Thomas, Jérôme, Gand, Georges, Gagnaison, Cyril, Barrier, Pascal & Néraudeau, Didier, 2024, Crocodylomorph and dinosaur tracks from the lowermost Jurassic of Le Veillon (western France): ichnotaxonomic revision of the type material (Lapparent collection), Geodiversitas 46 (8), pp. 343-366 : 360

“Unnamed track n°1”

( Fig. 13 A-C)

Unnamed track n°1 – Lapparent & Montenat 1967: 30, fig. 18.

STATUS. — Specimens here identified as Batrachopus isp.

EXAMINED MATERIAL. — ULB-04C14_I , ULB-04C17_A .

DESCRIPTION

The two tracks described by Lapparent & Montenat (1967) under the name “Unnamed track n°1” are poorly preserved. They are tetradactyl, small-sized, as long as wide, 3.3-(3.4)- 3.6 cm long and 2.8-(3.0)- 3.2 cm wide ( Fig. 13 A-C; Table 1 ). Traces of digits are short. They show rounded phalangeal pads and their apices bear tiny marks of claws. A large plantar-like impression is present on ULB-04C14_I.

REMARKS

In their description of “Unnamed track n°1”, Lapparent & Montenat (1967) made a mistake by considering that both tracks are tridactyl. However, a thorough examination of the material reveals the presence of a poorly marked fourth digit. The morphology and the dimensions of “Unnamed track n°1” match with the ichnogenus Batrachopus .

Figures

FIG. 13. — Other problematic tracks in Lapparent & Montenat 1967: A-C, Batrachopus isp., ULB-04C14_I, photograph (A), interpretative sketch of Lapparent & Montenat (1967) (B) (“Unnamed track n°1” in Lapparent & Montenat 1967: fig. 18), and our interpretation (C); D-F, Grallator cf. variabilis, ULB-04D22_A, photograph (D), interpretative sketch of Lapparent & Montenat (1967) (E) (“Unnamed track n°2” in Lapparent & Montenat 1967: fig. 18 and pl. XIII.5), and our interpretation (F). Scale bars: A-C, 1 cm; D-F, 5 cm.