brachiopod


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brachiopod

or

lamp shell

any marine invertebrate animal of the phylum Brachiopoda. They were the dominant marine forms of PALAEOZOIC and MESOZOIC times and a few species survive. See BIVALVE.
References in periodicals archive ?
Although the systematic position of that brachiopod is uncertain, its shell structure is of interest as it differs from those of the other Cambrian lingulate brachiopods identified in the same region.
In contrast, brittle stars and brachiopods were dense in low-relief mixed rock but rare or absent in low-relief mixed sediment.
Mississippian brachiopod biostratigraphy and the Osagean-Meramecian boundary in south-sentral Indiana.
These zones were characterized by a mussel-dominated assemblage at [approximately] 3 m; a hydroid and bryozoan dominated assemblage at [approximately] 5 m; a sponge, bryozoan, and ascidian dominated assemblage at [approximately] 10 m; and a deeper assemblage of sponges, bryozoans, brachiopods, and ascidians at [approximately] 18 m depth (Witman and Grange 1998).
A new subspecies of the clitambonitidine brachiopod Estlandia catellatus from the Middle Ordovician of Osmussaar Island, Estonia.
The diverse bioclastic Wackstone facies (AMB 3B) is dominated by adiverse assemblage of different bioclasts including brachiopod (20%), bryozoans (12%), algae (5%), bivalve (3%), echinoderm (5%) and fusulinid forams (2%).
Whereas an extensive research has been carried out on the brachiopod faunas of the northern and innermost areas of the basin (Castilian and Aragonese branches), the Ibero-Levan-tine Sector (I-LS hereinafter) of the Iberian Range remains insufficiently studied, probably due to the patchy distribution of the outcrops, particularly in the southern part of this region (Gomez, 1979).
41) Among these are the spicules of different groups of sponges and the shells of the earliest known "crown group" mollusks and brachiopods.
These studies have provided valuable information on brachiopod growth across different latitudes; however, small sample sizes, differing methodologies, and comparisons involving brachiopods from different genera (Doherty, 1979; Collins, 1991; Peck et at.
Smith (1976, 1980) and Mayr (1978) noted the presence of brachiopods of possible Early Devonian age from the lowest part of the upper member and suggested an age of Ludlow to earliest Devonian for the lower member and Gedinnian to early Siegenian (Lochkovian--early Pragian) for the upper member.
Brachiopod specimens from each quadrat were split in two groups: those with cream-white shells (G.