Tags » Tetrapods

Tulerpeton becomes the last common ancestor of all Reptilia (=Amniota)

Yesterday we looked at the nesting of Tulerpeton (Lebedev 1984; Latest Devonian; PIN 2921/7) as a basal reptile, rather than a basal tetrapod, which is the traditional nesting. 498 more words

Reptile Family Tree

Devonian fish heads

New data on February 27, 2017
focuses on Kenichthys (Zhu and Ahlberg 2004), a sarcopterygian fish in which the posterior naris has migrated to the jaw line, on its way to the inside of the mouth (Fig. 892 more words

Reptile Family Tree

Acherontiscus at the base of the caecilian clade

Acherontiscus caledoniae (Carroll 1969; Namurian, Carboniferous; 1967/12/1 Royal Scottish Museum; Fig. 1) is a tiny slender aquatic amphibian with vestigial limbs and a large pectoral girdle. 181 more words

Reptile Family Tree

Odd Gerrothorax nests with Greererpeton

Gerrothorax pulcherrimus (Nilsson 1934, Jenkins et al. 2008; Late Triassic) was and is considered a plagiosaurine temnospondyl. Here it nests with Greererpeton with which it shares a lack of a supratemporal-tabular rim, the straight lateral ribs and other traits. 456 more words

Reptile Family Tree

Did Acanthostega lose an intertemporal?

Or was it overlooked?
(See Fig. 1, blinks organge/green above the orbit.)

Ancestral osteolepiformes
like Osteolepis have an intertemporal. So do many (but not all) basal tetrapods. 323 more words

Reptile Family Tree

Eocaecilia and Brachydectes: old mistakes and new insights

Updated February 9, 13 and 17, 2017 with more taxa added to the LRT and revisions to the skull bone identification.

Further updated March 18, 2017… 760 more words

Reptile Family Tree

Pederpes gets the DGS treatment

Updated March 15, 2017 with higher resolution data. 

The first known basal tetrapod with a five-toed pes is
Pederpes finneyae (Clack 2002; Tournasian, early Carboniferous, 348mya; 1m in est. 142 more words

Reptile Family Tree