Unnnamed N Korea anurognathid (Gao et al. 2009, Early Cretaceous, no museum number) has a smaller skull than other flathead anurognathids. Here it nests with Cascocauda (below). The ulna is longer. The free fingers and sternum are unknown.

Cascocauda rong (Yang et al. 2022, Yang et al. 2018; Middle-Late Jurassic; NJU-57003) is a complete skeleton of a disc-skull anurognathid with soft tissue related to Vesperopterylus (below). Distinct from other anurognathids, m4.1 does not reach the elbow when folded. Unfortunately the authors had trouble identifying skull parts. The sclerotic ring identified by Yang et al. 2022 is the displaced squamosal + postorbital broken like an egg shell in this small extremely fragile pterosaur.

This specimen was featured in a paper on pterosaur filaments that incorrectly aligned pterosaurs with feathered dinosaurs, rather than their true ancestors, the filamentous fenestrasaurs, Sharovipteryx and Longisquama.

Vesperopterylus lamadongensis (Lü et al. 2017; Early Cretaceous; BMNHC-Phoc1311) is a complete skeleton of a wide-skull anurognathid. It was considered the first pterosaur with a reversed first toe based on the fact that in digit 1 the palmar surface of the ungual is oriented lateral while digits 2–4 the palmar surfaces of the unguals are medial. That is based on the slight transverse curve of the metatarsus (Peters 2000) and the crushing which always lays unguals on their side. In life the palmar surfaces were all ventral and digit 1 radiated anteriorly along with the others.

Lü et al were unable to segregate the skull bones.
Those are segregated by color here using DGS (Digital Graphic Segregation). See below. Some soft tissue is preserved on the wing. Note: I did not see the fossil first hand, yet I was able to discern the skull bones that evidently baffled those who had this specimen under a binocular microscope. Perhaps they were looking for the giant sclerotic rings in the anterior skull that are not present. Little ones in the back, yes.

Gao K-Q 2009. Early Cretaceous birds and pterosaurs from the Snuiju Series, and geographic extension of the Jehol Biota into the Korean Peninsula. J. Paleont. Soc. Korea 25(1:57-61.

Lü J-C et al. 2017. Short note on a new anurognathid pterosaur with evidence of perching behaviour from Jianchang of Liaoning Province, China. From: Hone, D. W. E., Witton MP and Martill DM(eds) New Perspectives on Pterosaur Palaeobiology.
Geological Society, London, Special Publications, 455, https://doi.org/10.1144/SP455.16

Yang et al. (8 co-authors) 2018. Pterosaur integumentary structures with complex feather-like branching. Nature ecology & evolution.

Yang Z, Benton MJ, Hone DWE, Xu X, McNamara ME and Jiang B 2022. Allometric analysis sheds light on the systematics and ontogeny of anurognathid pterosaurs. Journal of Vertebrate Paleontology Article: e2028796 doi: https://doi.org/10.1080/02724634.2021.2028796

wiki/Vesperopterylus
wiki/Cascocauda
wiki/North Korea anurognathid - not yet named