Sinomacrops derives from the Ancient Greek word roots Sino~, referring to China, macro~ (makros), meaning large, and ops, meaning eyes/face. The name Sinomacrops is in reference to both the large eyes of and the broad faces that are typical of the family Anurognathidae, as well as to the Chinese origin of the animal. The specific name, bondei, honors paleontologist Niels Bonde.[1]
Description
Fossil (A) and schematic drawing (B) of the right foot of Sinomacrops
Sinomacrops exhibits two autapomorphies (distinguishing traits) that distinguish it from other pterosaurs: one of them is having the first three maxillaryalveoli (tooth sockets) closely spaced, and the other one is having the tibiotarsus twice as long as the femur.[1]
The holotype specimen of Sinomacrops, JPM-2012-001, consists of a crushed skeleton. The preserved bone tissue of skeleton shows a fragile, brittle condition. Due to this, in many parts of the skeleton, bone tissue fragments have been lost after the specimen was collected. These fragments that were lost left clear impressions on the matrix, which indicated their original location on the skeleton. Fragments of Sinomacrops that were lost include mainly the caudal vertebrae, the sternum, the distal (away from the point attachment) epiphysis (rounded end of a long bone) of the right humerus, proximal (near the point of attachment) epiphyses of both the right ulna and radius, parts of the left humerus, as well as most of the left manus (hand).[1]
The skeleton of Sinomacrops includes patches of soft tissue. A strange patch of soft tissue lateral (to the side) to the left tibiotarsus suggests that the brachiopatagium ("arm-membrane") extended to the rear onto the distal part of the lower leg. A brachiopatagium extending to the rear of the lower leg is also present in the species Jeholopterus ninchengensis, which is a close relative of Sinomacrops, this feature also appears in all pterosaurs in general.[1]
Classification
Variation in anurognathid jaw shape, notice Sinomacrops (B)
In its description in 2021, Wei and colleagues assigned Sinomacrops to the subfamily Batrachognathinae, a subfamily within the family Anurognathidae. Within the family, Sinomacrops was the sister taxon to the pterosaur Batrachognathus.[1] Below is a cladogram representing their phylogenetic analysis:
^ abcdefWei, X.; Pêgas, R. V.; Shen, C.; Guo, Y.; Ma, W.; Sun, D.; Zhou, X. (2021). "Sinomacrops bondei, a new anurognathid pterosaur from the Jurassic of China and comments on the group". PeerJ. 9: e11161. doi:10.7717/peerj.11161.
sinomacrops, genus, extinct, anurognathid, pterosaur, from, middle, late, jurassic, periods, what, daohugou, beds, tiaojishan, formation, mutoudeng, qinglong, county, hebei, province, remains, date, back, around, million, years, type, only, known, species, bon. Sinomacrops is a genus of extinct anurognathid pterosaur from the Middle to Late Jurassic periods of what is now the Daohugou Beds of the Tiaojishan Formation in Mutoudeng Qinglong County of the Hebei province The remains of Sinomacrops date back to around 164 to 158 million years ago The type and only known species is Sinomacrops bondei 1 SinomacropsTemporal range Callovian Oxfordian 164 158 Ma PreꞒ Ꞓ O S D C P T J K Pg NHolotype specimen of Sinomacrops JPM 2012 001 Scientific classificationKingdom AnimaliaPhylum ChordataOrder PterosauriaFamily AnurognathidaeSubfamily BatrachognathinaeGenus SinomacropsWei et al 2021Type species Sinomacrops bondeiWei et al 2021 Contents 1 Etymology 2 Description 3 Classification 4 ReferencesEtymology EditSinomacrops derives from the Ancient Greek word roots Sino referring to China macro makros meaning large and ops meaning eyes face The name Sinomacrops is in reference to both the large eyes of and the broad faces that are typical of the family Anurognathidae as well as to the Chinese origin of the animal The specific name bondei honors paleontologist Niels Bonde 1 Description Edit Fossil A and schematic drawing B of the right foot of Sinomacrops Sinomacrops exhibits two autapomorphies distinguishing traits that distinguish it from other pterosaurs one of them is having the first three maxillary alveoli tooth sockets closely spaced and the other one is having the tibiotarsus twice as long as the femur 1 The holotype specimen of Sinomacrops JPM 2012 001 consists of a crushed skeleton The preserved bone tissue of skeleton shows a fragile brittle condition Due to this in many parts of the skeleton bone tissue fragments have been lost after the specimen was collected These fragments that were lost left clear impressions on the matrix which indicated their original location on the skeleton Fragments of Sinomacrops that were lost include mainly the caudal vertebrae the sternum the distal away from the point attachment epiphysis rounded end of a long bone of the right humerus proximal near the point of attachment epiphyses of both the right ulna and radius parts of the left humerus as well as most of the left manus hand 1 The skeleton of Sinomacrops includes patches of soft tissue A strange patch of soft tissue lateral to the side to the left tibiotarsus suggests that the brachiopatagium arm membrane extended to the rear onto the distal part of the lower leg A brachiopatagium extending to the rear of the lower leg is also present in the species Jeholopterus ninchengensis which is a close relative of Sinomacrops this feature also appears in all pterosaurs in general 1 Classification Edit Variation in anurognathid jaw shape notice Sinomacrops B Life restoration of Sinomacrops In its description in 2021 Wei and colleagues assigned Sinomacrops to the subfamily Batrachognathinae a subfamily within the family Anurognathidae Within the family Sinomacrops was the sister taxon to the pterosaur Batrachognathus 1 Below is a cladogram representing their phylogenetic analysis Anurognathidae Dimorphodon weintraubiBatrachognathinae Sinomacrops bondeiBatrachognathus volansAnurognathinae Dendrorhynchoides curvidentatusLuopterus mutoudengensisJeholopterus ninchengensisAnurognathus ammoniVesperopterylus lamadongensisReferences Edit a b c d e f Wei X Pegas R V Shen C Guo Y Ma W Sun D Zhou X 2021 Sinomacrops bondei a new anurognathid pterosaur from the Jurassic of China and comments on the group PeerJ 9 e11161 doi 10 7717 peerj 11161 Portals Paleontology China Retrieved from https en wikipedia org w index php title Sinomacrops amp oldid 1044746950, wikipedia, wiki, book, books, library,
