brachiopod

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brachiopod

any marine invertebrate animal of the phylum Brachiopoda, having a ciliated feeding organ (lophophore) and a shell consisting of dorsal and ventral valves

References in periodicals archive ?

27 species f rom 13 genera regarding Late Permian brachiopod s were recognized in the present research work, Theost significant brachiopod families, in terms of frequency and variety, included Productida, Strophomenida, Rhynconellida and Athyris.

Late Permian brachiopoda fauna in north-western Iran

Brachiopods are numerous and well preserved there, making them an ideal group of animals to test the link between abundance and extinction.

Numbers 'don't always guard against extinction risk'

3) It is possible that the larvae of these inarticulate brachiopods suvived by becoming attached to the firm substrate of the bivalve shell.

Bivalve mollusks from the Maxville Limestone (Mississippian) in Ohio

1 is different from the columnar structure of acrotretoid brachiopod shells (Williams & Holmer 1992), as well as from that of Mickwitzia shells (Skovsted & Holmer 2003), where columns penetrate initially organic-rich layers.

A new type of shell structure in a phosphatic brachiopod from the Cambrian of Estonia/Eesti Kambriumist parinevate fosfaatse kojaga kasijalgsete poolmete uus struktuurituup

In contrast, brittle stars and brachiopods were dense in low-relief mixed rock but rare or absent in low-relief mixed sediment.

Benthic invertebrates that form habitat on deep banks off southern California, with special reference to deep sea coral

Mississippian brachiopod biostratigraphy and the Osagean-Meramecian boundary in south-sentral Indiana.

A case study in paleoecology from the Mississippian of Missouri, with a focus on chondrichthyan teeth

The appearance of brachiopod shells is similar to that of bivalves; however, brachiopods are different anatomically from bivalves and are considered to be unrelated evolutionarily to Mollusca (Pennington & Stricker 2001).

First extensive examination of genome size in phylum brachiopoda (Lamp Shells) collected from Japan

The central slit visible in your mould represents a prominent central ridge characteristic of pentamerid brachiopod shells, which served as an attachment point for strong muscles that opened and closed the shells.

Fossil forensics: identifying an undersea creature from what isn't there

The coarser fraction contains phosphatic brachiopod fragments derived from the Upper Cambrian to Lower Ordovician phosphate-bearing beds.

Impact-induced and diagenetic changes in minerals in the sandy ejecta of the Kardla crater, NW Estonia/Meteoriidiplahvatuse mojul ja diageneesi valtel tekkinud mineraalterade muutused Kardla kraatrit umbritsevas liivakas valjapaiskelasundis

girardeauensis is restricted to strata that contain a latest Ordovician, Hirnantian, brachiopod fauna (Amsden and Barrick, 1986).

Revision of ages of the Fusselman, Wristen, and Thirtyone Formations (Late Ordovician-Early Devonian) in the subsurface of West Texas based on conodonts and graptolites

3 m represents a matrix-supported breccia with abundant brachiopod coquinas.

First record of the Ordovician fauna in Mila-Kuh, eastern Alborz, northern Iran/Ordoviitsumi fauna esmaleid Pohja-Iraanis (Mila-Kuh, idapoolne Alborz)

One can find the phosphatic Obolus sandstone, including brachiopod bivalves and fragments, radioactive alum shale, glauconite-rich gray bentonite clay and glauconitic sandstone.