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Megalosauripus transjuranicus
Taxonomy
Megalosauripus transjuranicus was named by Razzolini et al. (2017). It is considered to be a form taxon. Its type specimen is TCH1030-T6-L1 (= MJSN-TCH006-1319), a footprint, and it is a trace fossil. Its type locality is Courtedoux/Chevenez tracksites (level 1030), which is in a Kimmeridgian peritidal mixed carbonate-siliciclastic in the Reuchenette Formation of Switzerland.
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Megalosauripus transjuranicus Razzolini et al. p. 9–10 fig. 4–10 |
| 2018 | Megalosauripus transjuranicus Marty et al. p. 943 |
| 2018 | Megalosauripus transjuranicus Rauhut et al. p. 16 |
| 2020 | Megalosauripus transjuranicus Castanera et al. p. 274 |
| 2021 | Megalosauripus transjuranicus Meyer et al. p. 553 |
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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.
†Megalosauripus transjuranicus Razzolini et al. 2017
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| N. L. Razzolini et al. 2017 | Functionally tridactyl, asymmetrical track, clearly longer than wide ([PL/PW]-ratio ranges from 1.17 to 2.02, track length ranges from 35.5 to 44.5 cm, with a moderate mesaxony ([te/PW]-ratio ranges from 0.35–0.73). Slender digits are well separated, often by small sediment ridges. Digit IV is the longest, followed by dIII and dII. Digit III is the widest, followed by dIV and dII. Tracks exhibit the typical theropod phalangeal pad formula of 2-3-4 corresponding to digits II, III and IV [57] in well-preserved tracks, while in slightly less well-preserved tracks, PIV3 and PIV2 are often not clearly discernible. PIV1 is very characteristic, as it has a circular (rounded) shape, it is the widest and largest phalangeal pad and is connected to the rest of dIV impression as it forms the round heel of the tracks. PIV1 is generally twice the width of the rest of dIV impression. Presence of well-marked and elongated claws, straight or sometimes inwardly/outwardly oriented on the tips of all three digits II-III-IV. Below digit II (between dII and dIV) a postero-medial indentation (notch) is well developed. Digit III impression is straight to sigmoidal; dII impression is generally inwardly oriented. Tips of dII and dIV can sometimes be on a line perpendicular to the long axis of dIII. Tips of digits II and IV can sometimes be on a line perpendicular to the long axis of digit III. Digit IV impression is the shallowest of the track. There is no evidence for a digit I (hallux) impression. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Marsh 1875 | |||||
Age range: base of the Late/Upper Kimmeridgian to the top of the Late/Upper Tithonian or 155.70000 to 145.00000 Ma
Collections (10 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Kimmeridgian | Switzerland (Jura) | Megalosauripus transjuranicus (88123 149745 219806 219807 type locality: 219819) Megalosauripus transjuranicus, Theropoda indet. (149742) Theropoda indet. (219805 219818) | |
| Middle Tithonian - Late/Upper Tithonian | Portugal (Centro) | Megalosauripus transjuranicus (219831 219832) |