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Ignotornis
Taxonomy
Ignotornis was named by Mehl (1931). It is the type genus of Ignotornidae.
It was assigned to Aves by Kuhn (1958); to Theropoda by Kuhn (1963); to Coelurosauria by Haubold (1971); to Saurischia by Haubold (1974); to Theropoda by Romero Molina et al. (2003); to Aves by Calvo (2007); and to Ignotornidae by Lockley et al. (1992), Kim et al. (2006), Kim et al. (2012) and Buckley et al. (2016).
It was assigned to Aves by Kuhn (1958); to Theropoda by Kuhn (1963); to Coelurosauria by Haubold (1971); to Saurischia by Haubold (1974); to Theropoda by Romero Molina et al. (2003); to Aves by Calvo (2007); and to Ignotornidae by Lockley et al. (1992), Kim et al. (2006), Kim et al. (2012) and Buckley et al. (2016).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1931 | Ignotornis Mehl pp. 443-444 fig. 1 |
| 1958 | Ignotornis Kuhn p. 28 |
| 1963 | Ignotornis Kuhn p. 108 |
| 1971 | Ignotornis Haubold p. 73 |
| 1974 | Ignotornis Haubold p. 45 |
| 1992 | Ignotornis Lockley et al. pp. 121-123 fig. 1,2 |
| 2003 | Ignotornis Romero Molina et al. p. 25 |
| 2006 | Ignotornis Kim et al. p. 62 |
| 2007 | Ignotornis Calvo p. 324 |
| 2012 | Ignotornis Kim et al. p. 34 |
| 2016 | Ignotornis Buckley et al. p. 261 |
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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. †Ignotornis Mehl 1931
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†Ignotornis gajinensis Kim et al. 2012
†Ignotornis mcconnelli Mehl 1931
†Ignotornis yangi Kim et al. 2006
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. G. Lockley et al. 1992 | Tetradactyl, slightly asymmetric bird tracks with variably preserved, posteriorly directed hallux impressions typically showing significant medial rotation towards trackway midline. Digit impressions slender, with variably preserved pad impressions and distal claw traces. Base of digit I elevated above plantar surface of foot. Pad impressions numbering up to 4 in digit III and up to 5 in digit IV. Divarication between digits II and IV high, averaging between 110°-120° (range 90°-150°). Trackways variable, but often showing slight to pronounced inward (positive) rotation of foot. Track width (distance from impression if digit II toe-tip to impression of digit IV toe-tip) ranges from about 2.5 cm to 7.5 cm. | |
| J. Y. Kim et al. 2012 | Tetradactyl bird tracks with prominent, postero medially directed hallux impressions comprise about one-third of total track length. Length with hallux is ∼ 5.5 cm; width, ∼ 4 cm. Hypex between digits III and IV is more anteriorly situated than hypex between digits II and III. Semipalmate web is slightly more developed between digits III and IV than between II and III. For digit divarication between II and IV, width varies between 105◦ and 125◦. Step is short with average inward rotation of ∼ 15◦. |