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Taxonomy
Cathayornis yandica was named by Zhou et al. (1992). Its type specimen is IVPP V9769, a skeleton, and it is a compression fossil. Its type locality is Beishan Quarry, Boluochi, which is in an Aptian lacustrine mudstone in the Jiufotang Formation of China.
It was synonymized subjectively with Sinornis santensis by Chiappe (2002).
It was synonymized subjectively with Sinornis santensis by Chiappe (2002).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1992 | Cathayornis yandica Zhou et al. p. 435 figs. 1-2 |
| 1994 | Cathayornis yandica Chiappe and Calvo p. 230 |
| 1997 | Cathayornis yandica Hou p. 60 |
| 1997 | Cuspirostrisornis houi Hou pp. 89-94 fig. 23 |
| 1997 | Largirostrornis sexdentornis Hou pp. 94-99 fig. 24 |
| 1999 | Cathayornis yandica Wang et al. p. 3 |
| 1999 | Cuspirostrisornis houi Wang et al. p. 3 |
| 1999 | Largirostrornis sexdentornis Wang et al. p. 3 |
| 2008 | Cathayornis yandica Li et al. p. 1116 |
| 2010 | Cathayornis yandica O'Connor and Dyke p. 16 |
| 2013 | Cathayornis yandica Zhou et al. |
| 2015 | Cathayornis yandica Wang and Liu |
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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.
†Cathayornis yandica Zhou et al. 1992
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Invalid names: Cuspirostrisornis houi Hou 1997 [synonym], Largirostrornis sexdentornis Hou 1997 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Z.-h. Zhou et al. 1992 | small-sized bird. Skull bones seldom fused, occipital foramen in posterior-ventral position, teeth present on premaxillae and dentaries. Scapular blades straight and slender, coracoids strutlike. Sternal notches developed, carina low, pelvic bones unfused. Humerus with a low and flat head' and a very small pneumatic fossa. External condyle of ulna in a lunate shape. Carpi and metacarpi fused into carpometacarpi. Wings retaining claws. Fibulae weak and separate from tibiae, metatarsi unfused, pedal claws strongly curved and pointed with undeveloped extensor tubercles. Synsacrum including 8 vertebrae, transverse processes of the last two of them expanding and fusing distally. Pygostyle long . | |
| L. H. Hou 1997 | A small species within the genus with a transverse groove between the frontal and parietal. A minumum of three teeth are present on the dentary. Sternum possesses a manubrium. Tarsometatarsus is longer than half the length of the tibiotarsus. Caudal vertebrae are shortened, and are not fused with the pygostyle. | |
| L. H. Hou 1997 (Cuspirostrisornis houi) | A small species with a potentially more flexible neck, pelvic girdle is unfused, femur is relatively long with well developed distal condyles and a slightly broadened intercondylar groove, proximal tarsometatarsus is fused, MtIII is the longest in the series, and Mt II is the shortest. | |
| L. H. Hou 1997 (Largirostrornis sexdentornis) | As for genus. Torso longer than all other known Early Cretaceous taxa, rostrum relatively large, femur slightly curved with a small head that is extremely projected, tibiotarsus particularly inflated proximally and with distal condyles laterally expanded, tarsometatarsus is short with digit III trochlea the longest, Mt I is positioned high, and talons are large and hooked. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Benton 1983, Marsh 1875 | |||||