{"id":400569,"date":"2026-03-24T01:32:09","date_gmt":"2026-03-24T01:32:09","guid":{"rendered":"https:\/\/www.europesays.com\/ie\/400569\/"},"modified":"2026-03-24T01:32:09","modified_gmt":"2026-03-24T01:32:09","slug":"ct-scans-solve-decades-old-mystery-of-triassic-cynodont","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ie\/400569\/","title":{"rendered":"CT Scans Solve Decades-Old Mystery of Triassic Cynodont"},"content":{"rendered":"

Known from a single skull discovered in South Africa in 1952, Cistecynodon parvus has been shuffled across the evolutionary tree: described at various times as a close relative of advanced cynodonts, a juvenile of another species and even something outside the group altogether. Now, a new study using computed tomography (CT) scans to digitally reconstruct the fossil concludes that this Triassic creature was its own valid species and a much more primitive cynodont than some paleontologists had thought.<\/strong><\/p>\n

\"Life<\/a><\/p>\n

Life reconstruction of Cistecynodon parvus. Image credit: Morgan Hopf.<\/p>\n

\u201cCynodontia<\/a> is one of the six major subclades of Therapsida appearing during the Late Permian and comprising a substantial and diverse quantity of the tetrapod fauna during the Triassic,\u201d said Dr. Erin Lund from the University of the Witwatersrand and colleagues.<\/p>\n

\u201cThis group is comprised of non-mammaliaform cynodonts and Mammaliaformes, including crown mammals, making it crucial for evaluating the origin of mammals.\u201d<\/p>\n

\u201cThe major Triassic radiation of cynodonts is represented by the Eucynodontia, which consists of two monophyletic subclades: Cynognathia and Probainognathia.\u201d<\/p>\n

In a new study, the paleontologists reexamined the skull of Cistecynodon parvus, a cynodont species that lived during the Middle Triassic, between 247 and 237 million years ago.<\/p>\n

The 5.72-cm-long specimen was found<\/a> in 1952 at Luiperdkop (or Luiperdskop), located west of the town Maletswai in the Eastern Cape province of South Africa.<\/p>\n

The researchers used CT to peer inside the fossil and reconstruct details of the skull, jaw and internal anatomy.<\/p>\n

Their analysis places Cistecynodon parvus among basal, or non-eucynodont, cynodonts rather than within the more advanced eucynodont group.<\/p>\n

At the same time, the fossil appears to have had an unusual combination of traits: a highly enlarged vestibule in the inner ear, a small and pinched parietal foramen, a relatively simple maxillary canal and the absence of carotid foramina.<\/p>\n

Together, these features distinguish Cistecynodon parvus from other cynodonts and support its status as a separate genus and species.<\/p>\n

According to the researchers, some of these features point to a subterranean way of life.<\/p>\n

In particular, they interpret the inflated vestibule of the inner ear as evidence of enhanced sensitivity to low-frequency sound, a trait associated in modern animals with fossorial, or burrowing, habits.<\/p>\n

They conclude that Cistecynodon parvus was likely an obligate fossorial animal.<\/p>\n

\u201cOver the past century Cistecynodon parvus has been variously referred to different clades of non-mammalian cynodont without any emerging consensus,\u201d the scientists said.<\/p>\n

\u201cThe data from this research firmly support that Cistecynodon parvus is a valid taxon of basal non-eucynodont Cynodontia (i.e., a non-eucynodont epicynodont).\u201d<\/p>\n

\u201cIts position is supported by the secondary palate, which is open along the midline, despite it being a sub-adult to adult age specimen.\u201d<\/p>\n

\u201cLastly, its unique inner ear and endocast anatomy supports that Cistecynodon parvus was a fossorial animal.\u201d<\/p>\n

\u201cCistecynodon parvus is reconstructed as a basal lineage of cynodonts in Southern Africa that survived the end Permian mass extinction and persisted as a relict fauna through to the early Middle Triassic,\u201d they concluded.<\/p>\n

Their paper<\/a> was published this month in The Anatomical Record.<\/p>\n

_____<\/p>\n

Erin S. Lund et al. Redescription of the Triassic cynodont Cistecynodon parvus and reassessment of its phylogeny. The Anatomical Record, published online March 19, 2026; doi: 10.1002\/ar.70179<\/p>\n","protected":false},"excerpt":{"rendered":"Known from a single skull discovered in South Africa in 1952, Cistecynodon parvus has been shuffled across the…\n","protected":false},"author":2,"featured_media":400570,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[77],"tags":[4204,181803,181804,162961,181805,181806,18,4696,19,17,133,5258,181807,75702],"class_list":["post-400569","post","type-post","status-publish","format-standard","has-post-thumbnail","category-science","tag-africa","tag-cistecynodon","tag-cistecynodon-parvus","tag-ct-scanner","tag-cynodont","tag-cynodontia","tag-eire","tag-fossil","tag-ie","tag-ireland","tag-science","tag-south-africa","tag-therapsida","tag-triassic"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@ie\/116281576458817849","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts\/400569","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/comments?post=400569"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts\/400569\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/media\/400570"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/media?parent=400569"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/categories?post=400569"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/tags?post=400569"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}