Pentamerida
Pentamerida is an order of biconvex, impunctate shelled, articulate brachiopods that are found in marine sedimentary rocks that range from the Middle Cambrian through the Devonian. Pentamerids are characterized by a short hinge line where the two valves articulate, inner areas above the hinge line that slope inwardly from the beak of each valve, and a well-developed spondylium on the pedical valve. The spondylim is a raised platform for muscle attachement found in the middle of the interior pedical valve, generally toward the hinge and beak. The pedical valve is the one that the pedicle, or hold-fast stalk, attaches to. The brachidia, which hold the lophophore, the ciliated feeding arms, are looped, as in the Orthida.
order (taxonomy)
primaryTopic
Pentamerida
Pentamerida is an order of biconvex, impunctate shelled, articulate brachiopods that are found in marine sedimentary rocks that range from the Middle Cambrian through the Devonian. Pentamerids are characterized by a short hinge line where the two valves articulate, inner areas above the hinge line that slope inwardly from the beak of each valve, and a well-developed spondylium on the pedical valve. The spondylim is a raised platform for muscle attachement found in the middle of the interior pedical valve, generally toward the hinge and beak. The pedical valve is the one that the pedicle, or hold-fast stalk, attaches to. The brachidia, which hold the lophophore, the ciliated feeding arms, are looped, as in the Orthida.
has abstract
Pentamerida is an order of bic ...... the more primitive of the two.
@en
Pentamerida, ordine estinto di ...... zione esterna a coste radiali.
@it
Pentameriden (Pentamerida) sin ...... der Rhynchonelliformea zählt.
@de
thumbnail
Link from a Wikipage to an external page
Wikipage page ID
28,789,209
Wikipage revision ID
671,760,828
authority
Schuchert and Cooper, 1931
image caption
Pentamerus internal mold
subdivision
*Pentameridina
*Syntrophiidina
subdivision ranks
hypernym
type
comment
Pentamerida is an order of bic ...... are looped, as in the Orthida.
@en
Pentamerida, ordine estinto di ...... 0 e i 360 milioni di anni fa).
@it
Pentameriden (Pentamerida) sin ...... der Rhynchonelliformea zählt.
@de
label
Pentamerida
@de
Pentamerida
@en
Pentamerida
@it