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Celericolius
Taxonomy
Celericolius was named by Ksepka and Clarke (2010). Its type is Celericolius acriala.
It was assigned to Colii by Ksepka and Clarke (2010); and to Coliidae by Mayr (2022).
It was assigned to Colii by Ksepka and Clarke (2010); and to Coliidae by Mayr (2022).
Species
C. acriala (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2010 | Celericolius Ksepka and Clarke p. 659 figs. Figs. 3-5 |
| 2022 | Celericolius Mayr p. 203 figs. Fig. 10.4 |
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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.
G. †Celericolius Ksepka and Clarke 2010
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†Celericolius acriala Ksepka and Clarke 2010
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. T. Ksepka and J. A. Clarke 2010 | Celericolius acriala exhibits two autapomorphies: (1) processus transversus vertebrae of the free caudal vertebrae distinctly anteroposteriorly broadened, and (2) ulna proportionately more elon- gate than that of all other Coliiformes, except Oligocolius brevitarsus (pronounced elongation of the ulna evolved independently in these two taxa based on their inferred phylogeny). The ulna : humerus ratio is greater than 1.10 in C. acriala whereas in other Coliiformes including Sandcoleidae this ratio is typi- cally less than 1.00. Within Colii, only Palaeospiza bella, Oligocolius brevitarsus, and extant Urocolius exhibit an ulna that is longer than the humerus.
Celericolius acriala differs from all other stem Coliiformes, but resembles extant Coliidae, in that pedal phalanx II-1 is subequal to phalanx II-2 in length. In other stem Coliiformes preserving the foot, phalanx II-1 is strongly abbreviated, measuring one-half of the length (Palaeospiza and Masillacolius) or one-third of the length (Sandcoleidae and Selmes) of phalanx II-2. Because pedal phalanges remain unknown for several fossil taxa, it is currently equally parsimonious to interpret the elongate phalanx II-1 as a local autapomorphy of C. acriala acquired con- vergently in Coliidae, or as a synapomorphy of a clade uniting C. acriala and Coliidae, with a reversal to the abbreviated state in Palaeospiza bella. Celericolius acriala can be diagnosed by the features listed above and can also be further differentiated from the comparatively closely related Palaeospiza bella and Oligocolius brevitarsus by a small (versus strongly projected) processus inter-metacarpalis, and by the subequal distal projection of metacarpals II and III (versus metacarpal III being significantly longer). Additionally, the tarsometatarsus of C. acriala is more elongate than in Oligocolius brevitarsus (tarsometatarsus : humerus ratio 0.93 versus 0.65). Celericolius acriala can be further dif- ferentiated from Masillacolius brevidactylus and Primocolius sigei by the more distally extensive crista deltopectoralis of the humerus in the new species, and from Selmes absurdipes by the straight (versus curved) humerus shaft. |
Measurements
No measurements are available
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| Source: f = family, o = order | |||||
| References: Lein 1972, Marsh 1875 | |||||
Age range: Wasatchian or 55.80000 to 50.30000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wasatchian | USA (Wyoming) | C. acriala (224383) |