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Makahala mirae
Taxonomy
Makahala mirae was named by Mayr (2015). Its type specimen is SMF Av 603, a set of limb elements, and it is a 3D body fossil. Its type locality is Bullman Creek, which is in a Rupelian deep-water sandstone/conglomerate in the Makah Formation of Washington. It is the type species of Makahala.
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Makahala mirae Mayr p. 13 figs. Fig. 1 |
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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.
†Makahala mirae Mayr 2015
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Mayr 2015 | Medium-sized procellariiform species, characterized by the absence of a processus supracondylaris dorsalis of the humerus and by a club-shaped distal end of the radius. The latter feature is considered autapomorphic, whereas absence of a dorsal supracondylar pro- cess is likely to be plesiomorphic for Procellariiformes. The new species is further distinguished from:
- the latest Cretaceous/earliest Paleocene Tytthostonyx in: humerus with crest along dorsal margin of distal end shorter and condylus dorsalis oriented less obliquely towards longitudinal axis of bone; ventral portion of condylus ventralis more prominent craniodistally and ventrally sloping. - the early Eocene Primodroma in: humerus with ridge along dorsal surface of distal end forming a straight margin (convex in Primodroma). - the early Oligocene Diomedeoididae (Rupelornis) in: humerus with fossa musculi brachialis less well defined; dorsal margin of sulcus humerotricipitalis not forming a sharply protruding ledge (Mayr & SmitH 2012a and Fig. 2). - all Diomedeidae (including the early Oligocene Tydea): humerus with fossa musculi brachialis more marked; tuberculum supracondylare ventrale not proximodistally elongated; further differs from extant Diomedeidae in the absence of a well-developed processus supracondylaris dorsalis (Fig. 2). - all Procellariidae: humerus without well-developed processus supracondylaris dorsalis; tuberculum supracondylare ventrale not proximodistally elongated; incisura radialis of ulna shallow (Fig. 2). - Hydrobatinae: much larger size; humerus without processus supracondylaris dorsalis. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Bush and Bambach 2015, Marsh 1875, Benton 1983 | |||||