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Kompsornis longicaudus
Taxonomy
Kompsornis longicaudus was named by Wang et al. (2020). Its type specimen is AGB-6997, a skeleton (a nearly complete and articulated adult individual preserved on a single slab), and it is a compression fossil. Its type locality is Lingyuan (general), which is in an Aptian terrestrial horizon in the Jiufotang Formation of China. It is the type species of Kompsornis.
Synonymy list
Year | Name and author |
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2020 | Kompsornis longicaudus Wang et al. |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Kompsornis longicaudus Wang et al. 2020
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Diagnosis
Reference | Diagnosis | |
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X. Wang et al. 2020 | A large long-tailed bird with the unique combination of features: extremely elongate forelimb (forelimb/hindlimb length = 1.45), tail (ratios of tail/forelimb and tail/hindlimb = 1.53 and 2.22, respectively), and middle caudal vertebrae (maximum ratio of length/height of centum = 6); completely fused sternum with a distinctly angular anterolateral corner and stout posterolateral processes* ; coracoid possessing a large fenestra located proximally between the procoracoid and acrocoracoid processes* ; pelvic girdle completely fused* ; pubis inclined more caudodorsally than in Jeholornis* ; tibia nearly equal to femur in length (tibia/femur length = 1.03); fifth metatarsal absent; ungual of the second pedal digit largest and much more expanded proximally than other pedal unguals. (* represents autapomorphic feature). |
Measurements
No measurements are available
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Source: subo = suborder, o = order | |||||
References: Marsh 1875, Benton 1983 |