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Lagerpeton chanarensis
Taxonomy
Lagerpeton chanarensis was named by Romer (1971). It is a 3D body fossil. Its type locality is Chañares River, 4.5 km east, which is in a Ladinian fluvial-lacustrine horizon in the Chañares Formation of Argentina. It is the type species of Lagerpeton.
Synonymy list
| Year | Name and author |
|---|---|
| 1971 | Lagerpeton chanarensis Romer |
| 1972 | Lagerpeton chanarensis Romer pp. 1-2 fig. 1 |
| 1973 | Lagerpeton chanarensis Bonaparte p. 108 |
| 1978 | Lagerpeton chanarensis Bonaparte p. 289 |
| 1979 | Lagerpeton chanarensis Bonaparte p. 220 |
| 1986 | Lagerpeton chanarensis Arcucci |
| 1988 | Lagerpeton canarensis Paul p. 243 |
| 1991 | Lagerpeton chanarensis Olshevsky p. 104 |
| 1991 | Lagerpeton chanarensis Sereno p. 23 |
| 1994 | Lagerpeton chanarensis Sereno and Arcucci p. 385 |
| 1997 | Lagerpeton chanarensis Arcucci p. 181 |
| 2003 | Lagerpeton chanarensis Yates p. 322 |
| 2006 | Lagerpeton chanarensis Ezcurra p. 657 fig. 3 |
| 2007 | Lagerpeton chanarensis Irmis et al. p. 359 |
| 2009 | Lagerpeton chanarensis Bittencourt and Kellner p. 20 |
| 2009 | Lagerpeton chanarensis Nesbitt et al. pp. 512-513 |
| 2010 | Lagerpeton chanarensis Langer et al. p. 58 |
| 2011 | Lagerpeton chanarensis Nesbitt p. 44 |
| 2015 | Lagerpeton chanarensis Martínez et al. p. 385 |
| 2016 | Lagerpeton chanarensis Griffin and Nesbitt p. 10 |
| 2016 | Lagerpeton chanarensis Martínez et al. p. 2 |
| 2018 | Lagerpeton chanarensis Marsh p. 1 |
| 2019 | Lagerpeton chanarensis Martz and Small p. 2 |
| 2020 | Lagerpeton chanarensis Moro et al. |
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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.
†Lagerpeton chanarensis Romer 1971
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. B. Arcucci 1986 | Posterior dorsal vertebrae with anteriorly-oriented neural spines. Sacrum with two vertebrae united to the ilium, the last presacral with signs of being integrated into the sacrum. Ilium with well-defined anterior projection. Well-developed supraacetabular
crest as in Lagosuchus. Pubis is wide and shorter than the ischium, laminar, and with symphysis restricted to the distal portion. Ischium with extended ventral lamina, very different from Lagosuchus. Hind limb long and slender with tibia longer than the femur, and asymmetrical pes as long as the tibia. Tibia with transversely extended distal region and anterior ventral process opposite that which appears in Lagosuchus and other thecodonts. Sigmoid femur with pneumatization and well-developed fourth trochanter. Reduced fibula with developed anterolateral process. Advanced mesotarsal tarsus of dinosauroid type. Astragalus with more developed ascending process than in Lagosuchus. Calcaneum without defined tubercle. Two distal tarsals, corresponding to metatarsals III and IV. Metatarsal IV longer than the rest. Metatarsal I short and V reduced, without phalanges. (Translated by M. Carrano.) | |
| A. B. Arcucci 1997 | Small archosaur with posterior vertebrae with anterodorsally inclined neural spines, iliac blade with sinuous dorsal margin, ischium with broad convex ventomedial flange and ventrally deep puboischiadic suture, proximal end of femur with flat anteromedial surface, astragalus with tongue-shaped posterior ascending process, pedal digit IV and metatarsal IV longer than pedal digit III and metatarsal III, respectively. |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||