Ctenorhachis (Greek for "comb spine") is an extinct genus of the family Sphenacodontidae. Ctenorhachis lived in the Early Permian epoch. Ctenorhachis was related to Dimetrodon, but did not belong to the same subfamily as Dimetrodon and Sphenacodon, being a more basal member of Sphenacodontidae. Two specimens are known that have been found from the Wichita Group outcropping in Baylor and Archer counties, north-central Texas. Only the vertebrae and pelvis are known. Articulated vertebrae from the holotype specimen possess blade like neural spines that are greatly enlarged, although not nearly to
via Wikidata · CC0
櫛棘龍屬（學名：Ctenorhachis）意為「櫛狀棘」，是種已滅絕合弓綱動物，屬於盤龍目楔齒龍科。櫛棘龍是異齒龍的近親，但較為原始，而異齒龍、楔齒龍屬於較為進階的楔齒龍亞科（Sphenacodontinae）。 櫛棘龍生存於二疊紀早期，目前已經發現兩個標本，包含脊椎、骨盆，發現於美國德州貝勒郡與阿徹郡。正模標本是一些關節相連的脊椎，上有多條神經棘，但沒有異齒龍、切齒龍的神經棘長。櫛棘龍與異齒龍的骨盆非常類似。早期研究提出，櫛棘龍的短神經棘，可能代表兩性異形。但後來該研究人員反對這個理論。
Abstract from DBpedia / Wikipedia · CC BY-SA
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).