Thecideida

Thecideida; Temporal range: Triassic–Recent PreꞒ Ꞓ O S D C P T J K Pg N
	Thecideide brachiopod (T), sabellid worm tube (S) and bryozoans (B) on the shell of the bivalve Ctenostreon from the Jurassic of Poland
Scientific classification
Kingdom:	Animalia
Phylum:	Brachiopoda
Class:	Rhynchonellata
Order:	Thecideida; Elliott, 1958
Superfamilies
	See text.

Thecideida is an order of cryptic articulate brachiopods characterized by their small size and habit of cementing their ventral valves to hard substrates such as shells, rocks and carbonate hardgrounds. Thecideides first appear in the Triassic (Jaecks and Carlson, 2001) and are common today (Lüter, 2005; Lüter et al., 2007).

Thecidium mediterraneum, A. natural size: B. section through shell (magnified)

Taxonomy[]

Order Thecideida

Superfamily Gray, 1840
Superfamily Bittner, 1890

References[]

Paleobiology Database on thecideides
Jaecks, G.S.; Carlson, S.J. (2001). "How phylogenetic inference can shape our view of heterochrony: examples from thecideide brachiopods". Paleobiology. 27 (2): 205–225. doi:10.1666/0094-8373(2001)027<0205:hpicso>2.0.co;2.
Lüter, C. (2005). "The first Recent species of the unusual brachiopod Kakanuiella (Thecideidae) from New Zealand deep waters". Systematics and Biodiversity. 3: 105–111. doi:10.1017/s1477200004001598.
Lüter, C.; Hoffmann, J.; Logan, A. (2007). "Cryptic speciation in the Recent thecideide brachiopod Thecidellina in the Atlantic and the Caribbean". Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 98 (3–4): 405–413. doi:10.1017/s1755691007078449.

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