 | pectoral girdle in Petrolacosaurus is light in comparison to the massive girdles found in taxa such as pelycosaurs. Petrolacosaurus specimens had a clavicle... 13 KB (1,536 words) - 23:53, 21 February 2024 |
 | Carboniferous to the Early Permian. The group contains the genera Araeoscelis, Petrolacosaurus, the possibly aquatic Spinoaequalis, and less well-known genera such... 11 KB (982 words) - 23:51, 21 February 2024 |
 | specifically, the most inclusive clade containing Captorhinus aguti and Petrolacosaurus kansensis but not Procolophon trigoniceps, by Tsuji and Müller (2009)... 6 KB (435 words) - 17:46, 30 April 2024 |
seed plants over ferns and lycophytes. First diapsid reptiles (e.g. Petrolacosaurus). 280 Ma Earliest beetles, seed plants and conifers diversify while... 83 KB (4,651 words) - 07:46, 12 April 2024 |
 | appear as a giant tarantula-like spider hunting the cat-sized reptile Petrolacosaurus in the segment detailing the Carboniferous, with the reconstruction... 22 KB (2,378 words) - 15:51, 18 January 2024 |
 | Fossils of the basal pelycosaur Archaeothyris and the basal diapsid Petrolacosaurus are also found in the same region of Nova Scotia, although from a higher... 8 KB (813 words) - 02:47, 3 April 2024 |
 | the Joggins Formation in Nova Scotia, and possibly New Brunswick. Petrolacosaurus, the earliest known diapsid reptile, lived during the late Carboniferous... 110 KB (11,562 words) - 12:52, 11 April 2024 |
Araeoscelis (9) but more than Petrolacosaurus (6). The maxilla has about 25 teeth, more than Araeoscelis (19) but less than Petrolacosaurus (35). The fourth and... 4 KB (383 words) - 23:53, 21 February 2024 |
 | "Younginiformes" (later, more specifically, emended to Youngina capensis) than to Petrolacosaurus. The cladogram presented here illustrates the "family tree" of reptiles... 18 KB (1,020 words) - 13:01, 12 April 2024 |
| 302–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N Skull diagram of the araeoscelidian Petrolacosaurus kansensis Nile crocodile (Crocodylus niloticus) Scientific classification... 13 KB (878 words) - 03:13, 19 April 2024 |
 | †Araeoscelidia Aphelosaurus Araeoscelis Dictybolos? Halgaitosaurus Kadaliosaurus Petrolacosaurus Spinoaequalis? Zarcasaurus †Captorhinidae Amniota (crown group)... 3 KB (266 words) - 16:42, 13 March 2024 |
 | cliffs, the same locality in which the early reptiles Hylonomus and Petrolacosaurus (both of which resemble Archaeothyris) were found. Archaeothyris lived... 6 KB (509 words) - 15:41, 28 April 2024 |
 | Hylonomus, from 312 million years ago, another early anapsid reptile Petrolacosaurus, from 302 million years ago, the first diapsid reptile Archaeothyris... 3 KB (231 words) - 23:54, 21 February 2024 |
 | found by separating it from a block that also contained the remains of Petrolacosaurus and Haptodus. The evolutionary significance of the taxon wasn't realized... 8 KB (741 words) - 15:20, 6 April 2024 |
 | †Araeoscelidia Aphelosaurus Araeoscelis Dictybolos? Halgaitosaurus Kadaliosaurus Petrolacosaurus Spinoaequalis? Zarcasaurus †Captorhinidae Amniota (crown group)... 30 KB (2,729 words) - 14:19, 19 April 2024 |
 | †Araeoscelidia Aphelosaurus Araeoscelis Dictybolos? Halgaitosaurus Kadaliosaurus Petrolacosaurus Spinoaequalis? Zarcasaurus †Captorhinidae Amniota (crown group)... 15 KB (1,156 words) - 19:02, 27 March 2024 |
Mesothelae suborder. The coal forest is also inhabited by the early reptile Petrolacosaurus, one of the few creatures that end up surviving a catastrophic forest... 18 KB (1,371 words) - 15:10, 1 May 2024 |
 | in Kansas, United States, was one of the first diapsids, along with Petrolacosaurus. It was also the first reptile to return to the water, evolving shortly... 2 KB (155 words) - 23:54, 21 February 2024 |
 | †Araeoscelidia Aphelosaurus Araeoscelis Dictybolos? Halgaitosaurus Kadaliosaurus Petrolacosaurus Spinoaequalis? Zarcasaurus †Captorhinidae Amniota (crown group)... 21 KB (1,640 words) - 15:28, 2 May 2024 |
 | †Araeoscelidia Aphelosaurus Araeoscelis Dictybolos? Halgaitosaurus Kadaliosaurus Petrolacosaurus Spinoaequalis? Zarcasaurus †Captorhinidae Amniota (crown group)... 68 KB (7,456 words) - 16:49, 3 May 2024 |
 | Utatsusaurus was closely related to the lizard-like diapsid reptiles such as Petrolacosaurus, making ichthyopterygians a distant relative to lizards, snakes and... 10 KB (1,008 words) - 15:31, 28 April 2024 |
 | (such as Youngina). However, they were not found to be as basal as Petrolacosaurus, one of the earliest and most primitive diapsids known. Although drepanosaurs... 22 KB (2,333 words) - 13:11, 9 March 2024 |
 | proportions—especially the large manus—are similar to the araeoscelidan Petrolacosaurus. In 2024, Rossi and colleagues published the results of several detailed... 12 KB (1,173 words) - 14:08, 6 March 2024 |
 | †Araeoscelidia Aphelosaurus Araeoscelis Dictybolos? Halgaitosaurus Kadaliosaurus Petrolacosaurus Spinoaequalis? Zarcasaurus †Captorhinidae Amniota (crown group)... 28 KB (2,956 words) - 14:49, 27 April 2024 |
 | linked the most basal ("primitive") diapsids (araeoscelidians such as Petrolacosaurus) to more derived ("advanced") diapsids, including the earliest ancestors... 22 KB (2,610 words) - 12:38, 12 April 2024 |
 | †Araeoscelidia Aphelosaurus Araeoscelis Dictybolos? Halgaitosaurus Kadaliosaurus Petrolacosaurus Spinoaequalis? Zarcasaurus †Captorhinidae Amniota (crown group)... 12 KB (1,065 words) - 12:56, 10 March 2024 |
 | †Araeoscelidia Aphelosaurus Araeoscelis Dictybolos? Halgaitosaurus Kadaliosaurus Petrolacosaurus Spinoaequalis? Zarcasaurus †Captorhinidae Amniota (crown group)... 17 KB (1,033 words) - 16:48, 25 March 2024 |
 | resembled a modern lizard. It differed from earlier forms, such as Petrolacosaurus, in that its teeth were larger and blunter; possibly they were used... 4 KB (336 words) - 15:48, 23 February 2024 |
 | †Araeoscelidia Aphelosaurus Araeoscelis Dictybolos? Halgaitosaurus Kadaliosaurus Petrolacosaurus Spinoaequalis? Zarcasaurus †Captorhinidae Amniota (crown group)... 10 KB (1,101 words) - 17:44, 7 March 2024 |
 | †Araeoscelidia Aphelosaurus Araeoscelis Dictybolos? Halgaitosaurus Kadaliosaurus Petrolacosaurus Spinoaequalis? Zarcasaurus †Captorhinidae Amniota (crown group)... 5 KB (427 words) - 23:51, 21 February 2024 |