Biology:Millerettidae

From HandWiki

Millerettidae is an extinct family of early reptiles from the Middle Permian to the Late Permian period (Capitanian - Changhsingian stages) of South Africa.[1] Although they were interpreted as a group of 'parareptiles',[2] recent anatomical studies[3][4] and phylogenetic analyses[5] have suggested that they are better interpreted as close relatives of the Neodiapsida as part of the larger clade Parapleurota. The millerettids were small insectivores and probably resembled modern lizards in appearance and lifestyle, even possessing a tympanum, or eardrum, on the side of their skull.[5]

The following cladogram shows the phylogenetic position of the Millerettidae within 'Parareptilia', from Ruta et al., 2011.[6]

Mesosauria

Brazilosaurus sanpauloensis

Mesosaurus tenuidens

Stereosternum tumidum

Eunotosaurus africanus

Millerettidae

Milleretta rubidgei

Broomia perplexa

"Millerosaurus" nuffieldi

Milleropsis pricei

Millerosaurus ornatus

Procolophonomorpha

Australothyris smithi

Microleter mckinzieorum

Ankyramorpha

Subsequent research by Jenkins and colleagues (2025) based on synchrotron data and an expansive phylogenetic dataset recovered the Millerettidae as the sister group to the Neodiapsida, closer to the reptile crown group. These results are displayed in the cladogram below, with taxa traditionally regarded as 'parareptiles' highlighted:[5]

Sauropsida

Araeoscelidia

Bolosauridae

Neoreptilia
Ankyramorpha

Acleistorhinidae

Pareiasauromorpha

Procolophonoidea

Mesosauridae

Cabarzia

Ascendonanus

Orovenator

Parapleurota
Millerettidae

Lanthanolania

Broomia

Milleropsis

Milleretta

Millerosaurus

Neodiapsida

EAZ younginiform

Youngina

Acerosodontosaurus

Hovasaurus

Thadeosaurus

Weigeltisauridae

Claudiosaurus

Reptile crown group
(Lepidosauromorpha +
Archosauromorpha)

   former 'parareptiles'

References

  1. Gow, C. E. (1972). "The osteology and relationships of the Millerettidae (Reptilia: Cotylosauria)" (in en). Journal of Zoology 167 (2): 219–264. doi:10.1111/j.1469-7998.1972.tb01731.x. ISSN 1469-7998. https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1469-7998.1972.tb01731.x. 
  2. Laurin, Michel; Reisz, Robert R. (February 1995). "A reevaluation of early amniote phylogeny" (in en). Zoological Journal of the Linnean Society 113 (2): 165–223. doi:10.1111/j.1096-3642.1995.tb00932.x. https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.1995.tb00932.x. 
  3. Jenkins, Xavier A; Benson, Roger B J; Elliott, Maya; Jeppson, Gabriel; Dollman, Kathleen; Fernandez, Vincent; Browning, Claire; Ford, David P et al. (2025-03-03). "New information on the anatomically derived millerettid Milleretta rubidgei from the latest Permian based on µCT data" (in en). Zoological Journal of the Linnean Society 203 (3). doi:10.1093/zoolinnean/zlaf004. ISSN 0024-4082. 
  4. Jenkins, Xavier A.; Benson, Roger B. J.; Ford, David P.; Browning, Claire; Fernandez, Vincent; Griffiths, Elizabeth; Choiniere, Jonah; Peecook, Brandon R. (2025-01-08). "Cranial osteology and neuroanatomy of the late Permian reptile Milleropsis pricei and implications for early reptile evolution". Royal Society Open Science 12 (1). doi:10.1098/rsos.241298. PMID 39780968. PMC 11707879. https://royalsocietypublishing.org/doi/10.1098/rsos.241298. 
  5. 5.0 5.1 5.2 Jenkins, Xavier A; Benson, Roger BJ; Ford, David P; Browning, Claire; Fernandez, Vincent; Dollman, Kathleen; Gomes, Timothy; Griffiths, Elizabeth et al. (2025-08-28). "Evolutionary assembly of crown reptile anatomy clarified by late Paleozoic relatives of Neodiapsida" (in en). Peer Community Journal 5: e89. doi:10.24072/pcjournal.620. ISSN 2804-3871. 
  6. Ruta, Marcello; Cisneros, Juan C.; Liebrecht, Torsten; Tsuji, Linda A.; Müller, Johannes (2011). "Amniotes through major biological crises: faunal turnover among Parareptiles and the end-Permian mass extinction" (in en). Palaeontology 54 (5): 1117–1137. doi:10.1111/j.1475-4983.2011.01051.x. ISSN 1475-4983. https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1475-4983.2011.01051.x. 

Template:Sauropsida Template:Parareptilia Wikidata ☰ Q2286106 entry