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ANGUSTINARIPTERUS
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Genus: Angustinaripterus He, Yan & Su, 1983
Etymology: "narrow-nostril wing"
Type species: A. longicephalus
Other Species: none
Diagnosis: See type species.
Classification: Breviquartossa cladi innom.
Holotype: ZDM T8001 — A partially complete skull. (He, Yan & Su, 1983)
Referred Specimens: none
Time: Bathonian, Middle Jurassic
Horizon: Xiaximiao Formation
Location: Dashanpu, Zigong County, China
Skull length: 165 mm
Total length: ?
Wingspan: ?
Mass: ?
Diagnosis: Low and long skull with a relatively blunt oral region. Cranial bones are completely fused. Quadrate is narrow with its distal end anteroventrally inclined. Orbits large and circular. Lateral temporal fenestra is large and tapers gradually ventrally. Antorbital fenestra is long, large, and nearly triangular in shape. Nares are narrow and long, forming a fissure-like structure. The depth of the nares is consistent from the anterior to the posterior end. The preorbital fenestrae and nares are completely separated from the orbits and preorbital fenestrae. A long and low vertical crest runs along the dorsal aspect of the cranium from its most anterior margin to at least above the orbits. The mandible is straight, narrow, and long, with a straight ventral margin, and displays an anterior margin that increases slightly in depth. The maxilla maintains nine teeth, among which three are long slender anterior teeth that are noticeably anteriorly inclined; the remaining six are relatively short and stocky teeth. They are arranged from the very anterior margin and run posteriorly to terminate at a point one-third the distance from the anterior margin of the antorbital fenestra. The mandible may maintain 9-10 teeth, with the anterior teeth being long and slender, and the central and posterior teeth short and stocky, or relatively blunt. The crowns of the dentition are all smooth or unstriated. (He, Yan & Su, 1983)
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