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Fumicollis hoffmani
Taxonomy
Fumicollis hoffmani was named by Bell and Chiappe (2015). Its type specimen is UNSM 20030, a set of postcrania, and it is a 3D body fossil. Its type locality is 5 miles northeast of Elkader, which is in a Coniacian/Santonian offshore chalk in the Niobrara Formation of Kansas. It is the type species of Fumicollis.
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Fumicollis hoffmani Bell and Chiappe p. 4–5 fig. 3–26 |
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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.
†Fumicollis hoffmani Bell and Chiappe 2015
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Bell and L. M. Chiappe 2015 | UNSM 20030 is unique from other hesperornithiform birds in possessing a suite of features that represent a combination of traits known from either Baptornis or Hesperornis and Parahe- sperornis. The following unique combination of features is diagnostic of Fumicollis hoffmani: presacral vertebrae with expanded ventral processes; elongate pelvis with reduced acetabulum (acetabulum width: pelvis length is approximately 0.096); femur with expanded lateral condyle (transverse extent of condyle over 75% of midshaft width) and moderately expanded trochanter (transverse extent of trochanter nearly half of midshaft width); tibiotarsus with triangular cnemial expansion and medial cnemial crest extended to midshaft; patella pyramidal with flattened caudal face and perforated for ambiens tendon; fibula with caudally-expanded proximal end and slightly depressed, saddle-shaped articular surface; tarsometatarsus with stacked or shingled metatarsals; distinct dorsal ridge of the tarsometatarsus formed by the entire length of metatarsal IV; tarsometatarsus with reduced and plantarly displaced trochlea II; enlarged medial trochlear ridge of metatarsal IV; phalanx III:1 with narrow medio-lateral width and greatly expanded, curved medial face of the distal end. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Bush and Bambach 2015, Benton 1983, Marsh 1875 | |||||
Age range: base of the Late/Upper Coniacian to the top of the Santonian or 89.30000 to 83.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Coniacian - Santonian | USA (Kansas) | Fumicollis hoffmani (type locality: 174624) |