Fraxinisaura rozynekae Schoch & Sues, 2018 b

Sues, Hans-Dieter & Schoch, Rainer R., 2025, Synopsis of the Triassic reptiles from Germany, Fossil Record 28 (2), pp. 411-483 : 411-483

Fraxinisaura rozynekae Schoch & Sues, 2018 b

Holotype.

SMNS 91547 , disarticulated but associated bones of a partial skeleton preserved on two blocks of matrix, including the right maxilla, right frontal, both jugals, right palatine, both dentaries, left epipterygoid, 10 dorsal vertebrae, rib fragments, right humerus, right femur, left ilium, and both tibiae (Fig. 11 A ).

Type locality.

Schumann Quarry, near Eschenau, Vellberg municipality, Schwäbisch Hall district, Baden-Württemberg.

Type horizon.

Untere Graue Mergel, Bed E 6, Erfurt Formation, Lower Keuper Subgroup. Age: Middle Triassic (Ladinian: Longobardian).

Referred material.

See Schoch and Sues (2018 b).

Diagnosis.

Distinguished by the following suite of derived features: Maxillary and dentary tooth crowns conical, usually with recurved apices, with three to five parallel striae on lingual surface near apex of crown, and with robust bases; maxilla with dorsoventrally low facial process and long anterior process; jugal with short anterior process and very short, freely ending posterior process (only in adults); and ilium with tall, posterodorsally extending process ( Schoch and Sues 2018 b).

Comments.

Fraxinisaura rozynekae is closely related to Marmoretta oxoniensis from the Middle Jurassic of England and Scotland and the Upper Jurassic of Portugal ( Evans 1991; Griffiths et al. 2021). These taxa share the absence of the premaxillary process of the maxilla, absence of a parietal foramen, and absence of an infraorbital foramen on the palate ( Griffiths et al. 2021). Both also share various lepidosauromorph features such as pleurodont tooth implantation.

References.

Sues and Schoch (2018 b), Ford et al. (2021), Griffiths et al. (2021).

Figures

Figure 11. Reptiles from the Lower Keuper Subgroup. A. Lepidosauromorph Fraxinisaura rozynekae, holotype (SMNS 91547), disarticulated but associated bones of partial skeleton. Scale bar: 2 mm. B. Lepidosauromorph Vellbergia bartholomaei, holotype (SMNS 91590), incomplete skull in oblique lateral view. Scale bar: 5 mm. C. Loricatan pseudosuchian Batrachotomus kupferzellensis, holotype (SMNS 52970), left maxilla in lateral view. Scale bar: 3 cm.