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Gwyneddichnium majore
Taxonomy
Gwyneddichnium majore was named by Bock (1952). It is considered to be a form taxon. Its type specimen is ANSP 15212-15213, a footprint, and it is a trace fossil. Its type locality is Gwynedd Tunnel (track layers), which is in a Norian floodplain claystone in the Lockatong Formation of Pennsylvania. It is the type species of Gwyneddichnium.
Synonymy list
Year | Name and author |
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1952 | Gwyneddichnium majore Bock p. 417 figs. Pl. 49, 50:1 |
1958 | Gwyneddichnium majore Kuhn p. 20 |
2007 | Gwyneddichnium majore Hunt and Lucas p. 216 |
2021 | Gwyneddichnium majore Klein and Lucas p. 73 |
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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.
†Gwyneddichnium majore Bock 1952
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Diagnosis
Reference | Diagnosis | |
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H. Klein and S. G. Lucas 2021 | Footprints of a quadruped in which the manus and pes are pentadactyl and mesaxonic, the pes is substantially larger than the manus, digits are thin, long, straight to slightly curved, have nodular phalangeal pad impressions and terminate in claws. Differs from the most similar, lacertoid ichnogenus Rhynchosauroides in the digit proportions, with digits III > II ≥ IV > I in Gwyneddichnium, whereas in Rhynchosauroides the proportions are IV > III > II > I. Also, the digits in Rhynchosauroides are thicker and display a greater curvature, whereas the digits of Gwyneddichnium are nearly straight or only slightly curved. Digit V in Rhynchosauroides is strongly recurved laterally, whereas in Gwyneddichnium digit V is often nearly parallel to digit IV. |
Measurements
No measurements are available
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Source: subo = suborder, subc = subclass, c = class, subp = subphylum | |||||
References: Carroll 1988, Hendy et al. 2009, Benton 1983 |
Age range: Norian or 228.00000 to 208.50000 Ma
Collections (3 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Norian | USA (Pennsylvania) | Gwyneddichnium majore (type locality: 68706) | |
Norian | USA (Virginia) | Gwyneddichnium majore (105101) | |
Norian - Rhaetian | USA (New Jersey) | Gwyneddichnium majore (92107) |