Anura incertae familiae
Liaobatrachus macilentus (Gao et Chen, 2004)
Anura incertae familiae
Early Cretaceous Yixian Formation, Dawangzhangzi BedHexianxin, Wangjiagou, Yixian, Liaoning, China
Family
Anura incertae familiae
Genus
Liaobatrachus
Authority
Dong, Roczek, Wang et Jones, 2013
Original combination
Yizhoubatrachus macilentus
Age
Early Cretaceous Yixian Formation, Dawangzhangzi Bed
Locality
Hexianxin, Wangjiagou, Yixian, Liaoning, China
Diagnosis
Compared with other species of Liaobatrachus, L. macilentus has parasphenoid cultriform process suddenly narrowing from narrow and needle-like; ilium with slightly triangular acetabulum; prepollex with two phalanges, distal larger than proximal; femur slightly longer than tibiofibula.
Remarks
Originally named Yizhoubatrachus macilentus by Gao et Chen (2004). Initially considered a large frog (SVL 115mm) but reexamination showed it is a medium-sized anuran (SVL 56mm). The holotype (ZMNH M 8621) is a juvenile individual based on unfused carpals, incomplete olecranon process, unfused ischia. Additional specimens include IVPP V 12510 (adult) and IVPP V 12541 (juvenile).
Figure caption
Liaobatrachus macilentus (from Dong et al., 2013). A. Holotype (ZMNH M8621), ventral view; B1-B3. Referred specimen (IVPP V 12510), ventral view: B1. Specimen photo, B2. Skull bone line drawing with white arrows indicating vomerine teeth, B3. Enlarged pelvic region photo with red arrow showing urostylose transverse process and white arrow showing triangular acetabular fossa. at. atlas, cl. clavicle, cle. cleithrum, co. coracoid, fp. frontoparietal, hu. humerus, psh. parasphenoid, pt. pterygoid, sca. scapula, sph. sphenethmoid, V2-V4. 2nd-4th presacral vertebrae, vo. vomer. Scale bar = 2 cm