Ambiortus Kurochkin, 1982
Ambiortus Kurochkin, 1982
(Doklady Akad. Nauk SSSR 262 (2): 453. NcZ)
(Ambiortidae NcZ) "uncertain origin"
am-bee-OR-tus (from Lat. ambiguus "vacillating, uncertain" +
Lat. ortus "origin, beginning")* (m)
alluding to its uncertain placement in avian evolution, with a complex mosaic of archaic traits
(a third phalange on the major digit of the wing)
and modern features (fused carpometacarpals and a sternal keel like that found in
carinate birds). Kurochkin thought the form was possibly ancestral to modern carinate birds.
Ornithurae Ambiortidae E. Cret. CAs. (Mongolia)
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