Glyptorthidae
Classification
Phylum: Brachiopoda
Class: Rhynchonellata
Order: Orthida
Family: Glyptorthidae (Schuchert & Cooper, 1931)
Cincinnatian genera: Glyptorthis
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Alternate Spelling: Glyptorthinae
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Alternate Spelling: Glyptorthinae
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Geologic Range
Lower Ordovician (Arenig) – Middle Silurian (Wenlock)
Common Paleoecology
Glyptorthidae is an extinct family of stationary epifaunal suspension feeders
Characteristics of the Family
- Medium to large brachiopod
- Subquadrate shape and generally has obtuse cardinal extremities
- Costate to Costellate ornamentation with strong concentric ornamentation developed as lamellose frills or spines
- Delthyrium and notothyrium of variable width>/li>
- Short dorsal interarea
- Dental plates normally present
- Relatively broad adductor track which is rarely shorter than diductor scars
- Generally well-developed callist
- Well developed notothyrial platform which normally supports the simple cardinal process
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Treatise on Invertebrate Paleontology, Part H, Vol. 3 (2000):
Treatise on Invertebrate Paleontology, Part H, Vol. 3 (2000):
- Systematics
- Medium to large, subquadrate usually with obtuse cardinal extremities, costate to costellate with strong concentric ornamentation developed as lamellose frills or even drawn out as spines; delthyrium and notothyrium varying in width, exceptionally covered, short dorsal interarea variably orientated; dental plates normally present, recessive, ventral muscle scar variable, with relatively broad adductor track rarely shorter than diductor scars, pedicle callist usually well developed; brachiophores variably structured and disposed, well-developed notothyrial platform normally supporting simple cardinal process and invariably prolonged anteriorly as median ridge; quadripartite dorsal scars commonly with anterior pair larger than posterior pair; sporadically impressed mantle canals with saccate ventral and digitate dorsal systems.
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Glyptorthis
