Atrypa
Atrypa is a genus of brachiopod with shells round to short egg-shaped, covered with many fine radial ridges (or costae), that split further out and growthlines perpendicular to the costae and 2-3 times wider spaced. The pedunculate valve is a little convex, but tends to level out or even become slightly concave toward the anterior margin (that is: opposite hinge and pedicle). The brachial valve is highly convex. There is no interarea (that is a flat area bordering the hinge line approximately perpendicular with the rest of the valve) in either valve. Atrypa was a cosmopolitan and occurred from the late Lower Silurian (Telychian) to the early Upper Devonian (Frasnian).
Atrypa
Atrypa is a genus of brachiopod with shells round to short egg-shaped, covered with many fine radial ridges (or costae), that split further out and growthlines perpendicular to the costae and 2-3 times wider spaced. The pedunculate valve is a little convex, but tends to level out or even become slightly concave toward the anterior margin (that is: opposite hinge and pedicle). The brachial valve is highly convex. There is no interarea (that is a flat area bordering the hinge line approximately perpendicular with the rest of the valve) in either valve. Atrypa was a cosmopolitan and occurred from the late Lower Silurian (Telychian) to the early Upper Devonian (Frasnian).
has abstract
Atrypa Dalman, 1828 è un gener ...... 'azione delle correnti marine.
@it
Atrypa is a genus of brachiopo ...... rly Upper Devonian (Frasnian).
@en
Atrypa is een uitgestorven ges ...... -Siluur tot het Vroeg-Carboon.
@nl
無洞貝屬(學名:Atrypa),又名無窗貝屬,是动物界腕足动 ...... 岩石內的化石中。其分佈之廣泛,存在於除南極洲之外的所有大陸。
@zh
family
order (taxonomy)
synonym
Cleiothyris (Phillips, 1841), Mikrothyris
Wikipage page ID
16,785,933
Wikipage revision ID
722,609,920
genus authority
image caption
Atrypa reticularis, 26mm, Eifel, Germany
subject
comment
Atrypa Dalman, 1828 è un gener ...... 8 e i 360 milioni di anni fa).
@it
Atrypa is a genus of brachiopo ...... rly Upper Devonian (Frasnian).
@en
Atrypa is een uitgestorven ges ...... -Siluur tot het Vroeg-Carboon.
@nl
無洞貝屬(學名:Atrypa),又名無窗貝屬,是动物界腕足动 ...... 岩石內的化石中。其分佈之廣泛,存在於除南極洲之外的所有大陸。
@zh
label
Atrypa
@en
Atrypa
@it
Atrypa
@nl
無洞貝屬
@zh
wasDerivedFrom
isPrimaryTopicOf
name
Atrypa
@en