Post by creature386 on Mar 16, 2013 18:58:33 GMT 5
Lycaenops ornatus
Systematik:
Synapsida
Therapsida
Eutherapsida
Neotherapsida
Theriodontia
Gorgonopsia
Gorgonopsidae
Lycaenops
L. ornatus[1]
Time: 265 to 255 million years ago (Capitanian to Wuchiapingian) [2]
Location: southern africa[2]
Description: Lycaenops ornatus was a Gorgonopsid from the upper Permian of southern africa, which is one of the easiest to-indentify gorgonopsids[3] The holotype (AMNH 2240) is known trough the skull and parts of the postcranium[4]. The skull was thin and eloganted, but quite deep[4]. The canines are strong and the snout is distally arched, both are characteristic features.[5]. The skull in general is a bit distorted and not very well connected between the quadrate and Squamosal.[1]. Colbert (1948) has redescribed the holotype in detail. He aswell found the skull eloganted, but deep, especially in the snout region. The skull has a total length of 206 mm[6]. Known paratypes are BPI 260, RC 147, RC 148 [7] and BPI 334[8]. These were not described in detail, as the holotype already shows the important features, the paratypes just confirm it[3].
As skull image (from source 3):
Classifikation:
Lycaenops shares lot's of features with Aelurognathus and Prorubidgea[3], altough Lycaenops was more basal, it was in general quite a basal gorgonopsid[8]. Sigogneau (1970) has given these three their own subfamily "Rubidgeinae"[9]. In the first description (Broom, 1925) Lycaenops ornatus was classified as a gorgonopsid.[4] Carroll (1988) aswell did so[9]. Other species of the genus Lycaenops are L. angusticeps[8], L. quadrata[10], L. sollasi (could be another animal)[3] and L. attenuatus[7]. Sigogneau has classified another species as L. microdon[8], but it's debatable if it's a Lycaenops[3]
Sources:
[1] Michel Laurin (1998) New data on the cranial anatomy of Lycaenops (Synapsida, Gorgonopsidae), and reflections on the possible presence of streptostyly in Gorgonopsians
[2] paleodb.org/cgi-bin/bridge.pl?a=checkTaxonInfo&taxon_no=39120&is_real_user=1
[3] Gebauer, E.V.I. (2007). Phylogeny and evolution of the Gorgonopsia with a special reference to the skull and skeleton of GPIT/RE/7113 ('Aelurognathus?' parringtoni) (Ph.D. thesis). Tübingen: Eberhard-Karls Universität Tübingen. pp. 1-316.
[4] Broom R. (1925): On some carnivorous therapsids. – Rec. Albany Mus., 3: 309-326.
[5] Broom R. (1932): The mammal-like reptiles of South Africa and the origin of mammals. – H. F. & G. Witherby, London XVII + 376 pp.
[6] Colbert, e. H. (1948): The mammal-like reptile Lycaenops. – Bull. Am. Mus. Nat. Hist., 89: 357-404.
[7] Brink, A. S. & Kitching, J. W. (1953): Studies on new specimens of the Gorgonopsia. – Pal. Africana, 1: 1-28
[8] Sigogneau, d. (1970): Révision systématique des gorgonopsiens sud-africains. – Cah. Paléont., Paris, XII + 414 pp.
[9] R. L. Carroll. 1988. Vertebrate Paleontology and Evolution.
[10] Haughton, S. H. (1927): On Karroo vertebrates from Nyasaland. – Trans. Geol. Soc. S. Afr., 29: 69-83.
Systematik:
Synapsida
Therapsida
Eutherapsida
Neotherapsida
Theriodontia
Gorgonopsia
Gorgonopsidae
Lycaenops
L. ornatus[1]
Time: 265 to 255 million years ago (Capitanian to Wuchiapingian) [2]
Location: southern africa[2]
Description: Lycaenops ornatus was a Gorgonopsid from the upper Permian of southern africa, which is one of the easiest to-indentify gorgonopsids[3] The holotype (AMNH 2240) is known trough the skull and parts of the postcranium[4]. The skull was thin and eloganted, but quite deep[4]. The canines are strong and the snout is distally arched, both are characteristic features.[5]. The skull in general is a bit distorted and not very well connected between the quadrate and Squamosal.[1]. Colbert (1948) has redescribed the holotype in detail. He aswell found the skull eloganted, but deep, especially in the snout region. The skull has a total length of 206 mm[6]. Known paratypes are BPI 260, RC 147, RC 148 [7] and BPI 334[8]. These were not described in detail, as the holotype already shows the important features, the paratypes just confirm it[3].
As skull image (from source 3):
Classifikation:
Lycaenops shares lot's of features with Aelurognathus and Prorubidgea[3], altough Lycaenops was more basal, it was in general quite a basal gorgonopsid[8]. Sigogneau (1970) has given these three their own subfamily "Rubidgeinae"[9]. In the first description (Broom, 1925) Lycaenops ornatus was classified as a gorgonopsid.[4] Carroll (1988) aswell did so[9]. Other species of the genus Lycaenops are L. angusticeps[8], L. quadrata[10], L. sollasi (could be another animal)[3] and L. attenuatus[7]. Sigogneau has classified another species as L. microdon[8], but it's debatable if it's a Lycaenops[3]
Sources:
[1] Michel Laurin (1998) New data on the cranial anatomy of Lycaenops (Synapsida, Gorgonopsidae), and reflections on the possible presence of streptostyly in Gorgonopsians
[2] paleodb.org/cgi-bin/bridge.pl?a=checkTaxonInfo&taxon_no=39120&is_real_user=1
[3] Gebauer, E.V.I. (2007). Phylogeny and evolution of the Gorgonopsia with a special reference to the skull and skeleton of GPIT/RE/7113 ('Aelurognathus?' parringtoni) (Ph.D. thesis). Tübingen: Eberhard-Karls Universität Tübingen. pp. 1-316.
[4] Broom R. (1925): On some carnivorous therapsids. – Rec. Albany Mus., 3: 309-326.
[5] Broom R. (1932): The mammal-like reptiles of South Africa and the origin of mammals. – H. F. & G. Witherby, London XVII + 376 pp.
[6] Colbert, e. H. (1948): The mammal-like reptile Lycaenops. – Bull. Am. Mus. Nat. Hist., 89: 357-404.
[7] Brink, A. S. & Kitching, J. W. (1953): Studies on new specimens of the Gorgonopsia. – Pal. Africana, 1: 1-28
[8] Sigogneau, d. (1970): Révision systématique des gorgonopsiens sud-africains. – Cah. Paléont., Paris, XII + 414 pp.
[9] R. L. Carroll. 1988. Vertebrate Paleontology and Evolution.
[10] Haughton, S. H. (1927): On Karroo vertebrates from Nyasaland. – Trans. Geol. Soc. S. Afr., 29: 69-83.