Angustinaripterus was named in 1983 by He Xinlu. The type species is Angustinaripterus longicephalus. The genus name is derived from Latinangustus, "narrow" and naris, "nostril", combined with Latinized Greek pteron, "wing". The specific name is derived from Latin longus, "long", and Greek kephale, "head".
The holotype, ZDM T8001, is a single skull with lower jaws, found in 1981 by researchers from the Zigong Historical Museum of the Salt Industry, in the Xiashaximiao Formation (Bathonian).
Descriptionedit
The skull of Angustinaripterus, of which the left side is severely damaged, is very elongated and flat. The back part is missing; in its preserved state it has a length of 192 millimeters (7.6 in); the total length in a complete state was estimated at 201 millimeters (7.9 in). On its top is a low crest, 2 to 3 millimeters (0.079 to 0.118 in) high. The nares are long, slit-like and positioned above and in front of the large skull openings, the fenestrae antorbitales, with which they are not confluent. Of the jaws, which are very straight, the front part is lacking. There are six pairs of teeth in the maxillae and three pairs in the premaxillae. In the mandible there are at least ten pairs of teeth, perhaps twelve. The back teeth are small, the front teeth are very long, robust and curved, pointing moderately forward. At the front they form a large, intermeshing "prey grab", that may have been used to snatch fish from the water surface. The teeth of Angustinaripterus resemble those of Dorygnathus.
Peter Wellnhofer in 1991, assuming the skull length was 16.5 centimeters (6.5 in), estimated the wingspan at 1.6 meters (5.2 ft).
Classificationedit
Xinlu placed Angustinaripterus into the family Rhamphorhynchidae. Because of the derived morphology and the large geographical distance with comparable European forms He also created a special subfamily Angustinaripterinae, of which Angustinaripterus itself is the only known member; because of this redundancy the concept is rarely used. He concluded that Angustinaripterus was directly related to the Scaphognathinae. David Unwin however, considers it a member of the other rhamphorhynchid subgroup: the Rhamphorhynchinae.
The cladogram (family tree) below is a phylogenetic analysis published by the paleontologists Brian Andres & Timothy Myers in 2013. They recovered Angustinaripterus as derived rhamphorhynchine, within the tribe Angustinaripterini, sister taxon to Sericipterus.[1]
^Andres, B.; Clark, J.; Xu, X. (2014). "The Earliest Pterodactyloid and the Origin of the Group". Current Biology. 24 (9): 1011–6. doi:10.1016/j.cub.2014.03.030. PMID 24768054.
Literatureedit
He, Xinlu; Yang, Daihuan; & Su, Chunkang, 1983, "A New Pterosaur from the Middle Jurassic of Dashanpu, Zigong, Sichuan", Journal of the Chengdu College of Geology supplement 1, pp. 27–33 [title in 1991 English translation by Will Downs]
angustinaripterus, basal, pterosaur, belonging, breviquartossan, family, rhamphorhynchidae, more, specifically, within, subfamily, rhamphorhynchinae, discovered, dashanpu, near, zigong, sichuan, province, china, temporal, range, middle, jurassic, preꞒ, scienti. Angustinaripterus was a basal pterosaur belonging to the breviquartossan family Rhamphorhynchidae more specifically within the subfamily Rhamphorhynchinae and discovered at Dashanpu near Zigong in the Sichuan province of China AngustinaripterusTemporal range Middle Jurassic PreꞒ Ꞓ O S D C P T J K Pg N Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Order Pterosauria Family Rhamphorhynchidae Subfamily Rhamphorhynchinae Genus AngustinaripterusHe et al 1983 Species A longicephalus Binomial name Angustinaripterus longicephalusHe et al 1983 Contents 1 Discovery and etymology 2 Description 3 Classification 4 See also 5 References 6 LiteratureDiscovery and etymology edit nbsp Skull Angustinaripterus was named in 1983 by He Xinlu The type species is Angustinaripterus longicephalus The genus name is derived from Latin angustus narrow and naris nostril combined with Latinized Greek pteron wing The specific name is derived from Latin longus long and Greek kephale head The holotype ZDM T8001 is a single skull with lower jaws found in 1981 by researchers from the Zigong Historical Museum of the Salt Industry in the Xiashaximiao Formation Bathonian Description editThe skull of Angustinaripterus of which the left side is severely damaged is very elongated and flat The back part is missing in its preserved state it has a length of 192 millimeters 7 6 in the total length in a complete state was estimated at 201 millimeters 7 9 in On its top is a low crest 2 to 3 millimeters 0 079 to 0 118 in high The nares are long slit like and positioned above and in front of the large skull openings the fenestrae antorbitales with which they are not confluent Of the jaws which are very straight the front part is lacking There are six pairs of teeth in the maxillae and three pairs in the premaxillae In the mandible there are at least ten pairs of teeth perhaps twelve The back teeth are small the front teeth are very long robust and curved pointing moderately forward At the front they form a large intermeshing prey grab that may have been used to snatch fish from the water surface The teeth of Angustinaripterus resemble those of Dorygnathus Peter Wellnhofer in 1991 assuming the skull length was 16 5 centimeters 6 5 in estimated the wingspan at 1 6 meters 5 2 ft Classification editXinlu placed Angustinaripterus into the family Rhamphorhynchidae Because of the derived morphology and the large geographical distance with comparable European forms He also created a special subfamily Angustinaripterinae of which Angustinaripterus itself is the only known member because of this redundancy the concept is rarely used He concluded that Angustinaripterus was directly related to the Scaphognathinae David Unwin however considers it a member of the other rhamphorhynchid subgroup the Rhamphorhynchinae The cladogram family tree below is a phylogenetic analysis published by the paleontologists Brian Andres amp Timothy Myers in 2013 They recovered Angustinaripterus as derived rhamphorhynchine within the tribe Angustinaripterini sister taxon to Sericipterus 1 Novialoidea Campylognathoides liasicus Campylognathoides zitteli Breviquartossa Rhamphorhynchidae Scaphognathus crassirostris Rhamphorhynchinae Dorygnathus banthensis Rhamphorhynchini Rhamphorhynchus muensteri Cacibupteryx caribensis Nesodactylus hesperius Angustinaripterini Qinglongopterus guoi Harpactognathus gentryii Sericipterus wucaiwanensis Angustinaripterus longicephalus Pterodactylomorpha Sordes pilosus MonofenestrataSee also editTimeline of pterosaur research List of pterosaursReferences edit Andres B Clark J Xu X 2014 The Earliest Pterodactyloid and the Origin of the Group Current Biology 24 9 1011 6 doi 10 1016 j cub 2014 03 030 PMID 24768054 The Pterosaur Database pdf Literature editHe Xinlu Yang Daihuan amp Su Chunkang 1983 A New Pterosaur from the Middle Jurassic of Dashanpu Zigong Sichuan Journal of the Chengdu College of Geology supplement 1 pp 27 33 title in 1991 English translation by Will Downs Portals nbsp Paleontology nbsp China Retrieved from https en wikipedia org w index php title Angustinaripterus amp oldid 1199747602, wikipedia, wiki, book, books, library,
