Apractocleidus teretipes

Post author:Adam S. Smith
Post published:06/06/2026
Post category:Cryptoclididae Plesiosauria Plesiosauroidea Species page

Cryptoclidus eurymerus

Post author:Adam S. Smith
Post published:14/09/2018
Post category:Species page

Tricleidus

Post author:Adam S. Smith
Post published:22/07/2018
Post category:Cryptoclididae Genus page Plesiosauria Plesiosauroidea

Skull of Tricleidus in lateral view. From Brown (1981).

Tricleidus is a cryptoclidid from the Oxford Clay Formation of the UK. The holotype specimen (NHMUK R 3539) consists of disarticulated elements including most of skull and half the postcranium, from the Kosmoceras jasoni – Peltoceras athleta zones from the lowest deposits of the Oxford Clay Formation. The type and only species…

Apractocleidus

Post author:Adam S. Smith
Post published:22/07/2018
Post category:Cryptoclididae Genus page Plesiosauria Plesiosauroidea

Cryptoclidus (the type specimen of 'Apractocleidus', V.1091, with the tail of V.1104 and a replica head) in the Hunterian Museum, Glasgow, Scotland. Photo by Adam S. Smith. 2007.

The genus and species 'Apractocleidus teretipes' was erected by Smellie (1916). Smellie (1915) provided a preliminary account of the specimen before he named it. The specimen is now regarded as an old-adult individual of Cryptoclidus. The taxon 'Apractocleidus' is therefore considered a junior synonym of Cryptoclidus. The specimen was collected by Alfred…