Strophomenata

Strophomenata is an extinct class of brachiopods in the subphylum Rhynchonelliformea.

Strophomenata
Temporal range: Cambrian Stage 4-Kimmeridgian,
516-150.8 Ma[1]
Strophomenid brachiopod with encrusting cornulitid worm tube (Upper Ordovician, SE Indiana).
Scientific classification
Kingdom: Animalia
Clade: Lophophorata
Phylum: Brachiopoda
Subphylum: Rhynchonelliformea
Class: †Strophomenata
Williams 1996
Orders

Orders

Billingsellida

An order that contains the suborder Clitambonitidina (and others?) .

Orthotetida

An order or superfamily that includes the Chilidiopsoidea.[2] Ontogeny given by Bassett and Popov (2017), resembling that of Kutorginides.[2]

Believed to be sister to Strophomenides, = Strophomenida + Billinsellida + Productida.[3]

Includes the Chileids (e.g. Coolinia).

gollark: Rewrite that as e^(some function of x), apply chain rule.
gollark: What do you mean? As in, if it involves 1/x or something like this? That's what the chain rule is for.
gollark: This can also be written as a function of x explicitly if you want (it is one implicitly).
gollark: It's the same. If you say "y = whatever (in terms of x), dy/dx = derivative of whatever (in terms of x)", this is equivalent to saying "f(x) = whatever (still in terms of x), f'(x) = derivative of whatever (in terms of x)".
gollark: Consider what is done to the x to attain your output of e^(x ln a).

References
  1. Paleobiology Database
  2. LE Holmer, Z Zhang, TP Topper, and L Popov 2017. The attachment strategies of Cambrian kutorginate brachiopods: the curious case of two pedicle openings and their phylogenetic significance. Journal of Paleontology, 2017.
  3. Bassett, M.G., and Popov, L.E. (2017). Earliest ontogeny of the Silurian orthotetide brachiopod ~Coolinia~ and its significance for interpreting strophomenate phylogeny. Lethaia 50, 504–510.


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