BEITRäGE ZUR KENNTNIS DER ORGANISATION EINIGER STEGOCEPHALEN DER SCHWäBISCHEN TRIAS

Huene, Friedrich von

doi:10.1111/j.1463-6395.1922.tb01025.x

Cited by 34 publications

(57 citation statements)

References 8 publications

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“…In Cope's (1888) original description of AMNH FARB 4186, a gap between two digits distal to an element identified as carpale 2 (distal carpal 1 in this paper) was interpreted as indicating a missing digit 2 and a total of five digits, a conclusion endorsed by Gregory (1915). In a different interpretation offered by Huene (1922), the first digit was displaced towards the radius away from its expected contact with distal carpal 1 to lie against a carpal named the carpale praepollicis by Huene, mediale 1 by Gregory et al (1923), and in this paper centrale 1. The remaining digits preserved their correct positions against the other distal carpals.…”

Section: Historical Importance and Previous Interpretations Of Amnh Fmentioning

confidence: 62%

“…A specific set of carpals and a pentadactyl manus were also assumed to be present in the first limbs. The existence of additional digits (prepollex and postminimus) was assumed given their presence in the manus of frogs and salamanders (Huene 1922;Gregory et al 1923;Steiner 1922). The key difficulties for hypotheses of early tetrapod limb evolution were where to place the metapterygial axis among the digits and the pattern of branches from this axis to form carpals and digits.…”

Section: Historical Importance and Previous Interpretations Of Amnh Fmentioning

confidence: 99%

“…The remaining digits preserved their correct positions against the other distal carpals. Gregory et al (1923), while criticizing other aspects of the interpretation of AMNH FARB 4186 by Huene (1922), agreed that the first digit was moved postmortem away from its proper articulation with distal carpal 1 and that Eryops has four rather than five digits in the manus.…”

Section: Historical Importance and Previous Interpretations Of Amnh Fmentioning

confidence: 99%

“…2A), and there is no need to assume postmortem lateral displacement of metacarpal 1 as hypothesized by Huene (1922) Lebedev and Coates 1995) suggests that a count of five digits is not plesiomorphic for tetrapods, but is a derived state that likely evolved once (Laurin 1998). The point within tetrapod evolution where digits were reduced from more than five to only five is ambiguous and there is no evidence that any clade including Temnospondyli was diagnosed by possession of five digits on the manus (Laurin 1998;Ruta et al 2003).…”

Section: Historical Importance and Previous Interpretations Of Amnh Fmentioning

confidence: 99%

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Carpus and tarsus of Temnospondyli

Dilkes

2015

Vert. Anat. Morph. Palaeo.

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Abstract:The carpus of Eryops megacephalus and tarsus of Acheloma cumminsi known from complete and articulated individuals have provided the standard anatomy of these skeletal regions for temnospondyls. Restudy of the carpus of Eryops confirms the presence of only four digits, but refutes evidence for a prepollex, postminimus, and distal carpal 5. The supposed contact surface on centrale 1 for a prepollex is reinterpreted as part of the articulation for metacarpal 1 that includes distal carpal 1. Contrary to previous interpretations, a notch on the intermedium does not fit against the lateral corner of the radius. An articular surface on the distal end of the ulna thought previously to contact an absent postminimus fits against the ulnare. Preparation of the tarsus of the type specimen of Trematops milleri (junior synonym of Acheloma cumminsi) and a previously undescribed crus and pes of Eryops finds no evidence for a pretarsale in either genus. Centrale 4 of the tarsus shares a similar rectangular shape with a wide contact for the tibiale among several temnospondyls whether terrestrial or aquatic. Limited flexibility of the carpus of Eryops and a strong palmar arch are probably weight-bearing features. A proximal-distal line of flexibility is present along the tibial side of the tarsus between the tibiale and centrale 4 and between centrale 2 and centrale 1. A phylogenetic analysis of Temnospondyli including new characters of the carpus and tarsus reveals considerable instability, highlighting the significance of Dendrerpeton acadianum, Balanerpeton woodi, Capetus palustris, and Iberospondylus schultzei.

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Section: Historical Importance and Previous Interpretations Of Amnh Fmentioning

confidence: 62%

Section: Historical Importance and Previous Interpretations Of Amnh Fmentioning

confidence: 99%

Section: Historical Importance and Previous Interpretations Of Amnh Fmentioning

confidence: 99%

Section: Historical Importance and Previous Interpretations Of Amnh Fmentioning

confidence: 99%

See 2 more Smart Citations

Carpus and tarsus of Temnospondyli

Dilkes

2015

Vert. Anat. Morph. Palaeo.

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“…The obtuse chevrons are found in the cranial position; the acute chevrons are positioned near the pubis. Earlier reports illustrating chevron-shaped gastralia throughout the gastralial apparatus are not based on (in situ) fossil evidence (e.g., Eudes-Deslongchamps, 1838; von Huene, 1908Huene, , 1915Gilmore, 1920;Camp, 1936;Madsen, 1976). Chevron-shaped gastralia are not found in all theropod specimens, and the occurrence of these bones even appears to vary within species.…”

Section: Chevron-shaped Gastraliamentioning

confidence: 96%