First arboreal 'pelycosaurs' (Synapsida: Varanopidae) from the early Permian Chemnitz Fossil Lagerstätte, SE Germany, with a review of varanopid phylogeny

@article{Spindler2018FirstA,
  title={First arboreal 'pelycosaurs' (Synapsida: Varanopidae) from the early Permian Chemnitz Fossil Lagerst{\"a}tte, SE Germany, with a review of varanopid phylogeny},
  author={Frederik Spindler and Ralf Werneburg and Joerg W. Schneider and Ludwig Luthardt and Volker Annacker and R. Roessler},
  journal={PalZ},
  year={2018},
  volume={92},
  pages={315-364}
}
A new fossil amniote from the Fossil Forest of Chemnitz (Sakmarian-Artinskian transition, Germany) is described as Ascendonanus nestleri gen. et sp. nov., based on five articulated skeletons with integumentary preservation. The slender animals exhibit a generalistic, lizard-like morphology. However, their synapsid temporal fenestration, ventrally ridged centra and enlarged iliac blades indicate a pelycosaur-grade affiliation. Using a renewed data set for certain early amniotes with a similar… Expand
A new varanopid synapsid from the early Permian of Oklahoma and the evolutionary stasis in this clade
TLDR
A new varanopid taxon is reported, represented by substantially more complete material, which supports the placement of this taxon within Mesenosaurus, as a new species, Me. efremovi. Expand
Varanopid from the Carboniferous of Nova Scotia reveals evidence of parental care in amniotes
TLDR
A fossil synapsid from the Carboniferous period of Nova Scotia that displays evidence of parental care is reported that adds to growing evidence that parental care was more widespread among Palaeozoic synapsids than previously thought and provides data permitting the identification of potential ontogeny-dependent traits within varanopids. Expand
A redescription ofOrovenator mayorum(Sauropsida, Diapsida) using high‐resolution μCT, and the consequences for early amniote phylogeny
TLDR
The earliest known neodiapsid Orovenator mayorum from the lower Permian of Oklahoma is redescribed using high‐resolution μCT, revealing remarkable details of the skull anatomy and prompting questions about relationships among early amniotes. Expand
Re-evaluation of an early sphenacodontian synapsid from the Lower Permian of England
  • F. Spindler
  • Biology
  • Earth and Environmental Science Transactions of the Royal Society of Edinburgh
  • 2020
TLDR
The holotypic isolated maxilla of the early sphenacodontian Haptodus grandis from the Cisuralian of England is revisited and reveals a mosaic distribution of maxillary features, most significantly regarding the precanine region. Expand
Medullosan seed ferns of seasonally-dry habitats: old and new perspectives on enigmatic elements of Late Pennsylvanian–early Permian intramontane basinal vegetation
Abstract The medullosans represent a diverse group of pteridosperms that was widely distributed in forested landscapes of the late Paleozoic. These plants became widely known from the extensiveExpand
A reexamination of Milosaurus mccordi, and the evolution of large body size in Carboniferous synapsids
ABSTRACT Milosaurus mccordi was described in 1970 as a large, pelycosaurian-grade synapsid from the latest Carboniferous of Illinois but has since received little attention. Here, the holotype andExpand
A faunivorous early sphenacodontian synapsid with a diastema
Our knowledge on early sphenacodontian and edaphosaurid synapsids, the group that includes the origin of the mammalian lineage, largely arose from the Pennsylvanian Garnett locality in Kansas. AExpand
A new mesenosaurine from the lower Permian of Germany and the postcrania of Mesenosaurus: implications for early amniote comparative osteology
TLDR
An investigation of limb proportions may suggest the occurrence of facultative bipedalism in Mesenosaurus and Cabarzia, and the documentation for both genera provides the most complete postcranial descriptions of non-varanodontine varanopids. Expand
Reassessment of historic ‘microsaurs’ from Joggins, Nova Scotia, reveals hidden diversity in the earliest amniote ecosystem
‘Microsaurs’ are traditionally considered to be lepospondyl non-amniotes, but recent analyses have recovered a subset of ‘microsaurs’, the fossorially adapted Recumbirostra, within Amniota. ThisExpand
Cranial osteology and systematics of the enigmatic early ‘sail-backed’ synapsid Echinerpeton intermedium Reisz, 1972, and a review of the earliest ‘pelycosaurs’
TLDR
The first new remains of Echinerpeton since its initial discovery are described, and the phylogenetic position of the taxon is revisited using Bayesian inference and parsimony-based methods, confirming it as a member of Ophiacodontidae. Expand
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