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Pseudolingula
Classification
Phylum:
Brachiopoda
Subphylum:
Linguliformea
Class:
Lingulata
Order:
Lingulida
Superfamily:
Linguloidea
Family:
Pseudolingulidae
Formal Genus Name and Reference:
Pseudolingula MICKWITZ, 1909, p. 771
Type Species:
Crania quadrata von EICHWALD, 1829, p. 273, OD
Images
(Click to enlarge in a new window)
Fig. 11, 1 a-f .* P. quadrata (von Eichwald), lower Ashgill, Estonia, a, b, ventral internal mold, lateral view of both valves, x0.6, c, anterior part of ventral internal mold showing mantle canals, Hiiumaa Island, RMS Br 135782, X1.7, d, e, interior of dorsal, ventral valve, Hiiumaa Island, RMS Br 65960, X1.7, f, posterior view of both valves, showing pseudointerareas, Lehtse, BMNH B 86354, X3.3 (new).
Synonyms
Geographic Distribution
North America, Great Britain, Sweden, Estonia, Lithuania, northwestern Russia, Ukraine (Podolia), Kazakhstan
Age Range
Beginning Stage in Treatise Usage:
Ordovician (Llanvirn-Ashgill)
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
Ordovician (Llanvirn-Ashgill)
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Shell elongate subrectangular, ventral pseudointerarea with narrow, deep pedicle groove, ventral visceral area extending anteriorly beyond midvalve, oblique muscle scars placed on broadly divergent ridges, dorsal visceral area bisected by broad median septum, extending from beak to anterior lateral muscle scars, dorsal central and anterior lateral muscle scars placed close together, vascula lateralia of both valves short, submedian, slightly converging, vascula media absent, inner surface of both valves with conspicuous wrinkling directly lateral to vascula lateralia
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Linguliformea
Class:
Lingulata
Order:
Lingulida
Superfamily:
Linguloidea
Family:
Pseudolingulidae
Formal Genus Name and Reference:
Pseudolingula MICKWITZ, 1909, p. 771
Type Species:
Crania quadrata von EICHWALD, 1829, p. 273, OD
Images
(Click to enlarge in a new window)
Fig. 11, 1 a-f .* P. quadrata (von Eichwald), lower Ashgill, Estonia, a, b, ventral internal mold, lateral view of both valves, x0.6, c, anterior part of ventral internal mold showing mantle canals, Hiiumaa Island, RMS Br 135782, X1.7, d, e, interior of dorsal, ventral valve, Hiiumaa Island, RMS Br 65960, X1.7, f, posterior view of both valves, showing pseudointerareas, Lehtse, BMNH B 86354, X3.3 (new).
Synonyms
Geographic Distribution
North America, Great Britain, Sweden, Estonia, Lithuania, northwestern Russia, Ukraine (Podolia), Kazakhstan
Age Range
Beginning Stage in Treatise Usage:
Ordovician (Llanvirn-Ashgill)
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
Ordovician (Llanvirn-Ashgill)
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Shell elongate subrectangular, ventral pseudointerarea with narrow, deep pedicle groove, ventral visceral area extending anteriorly beyond midvalve, oblique muscle scars placed on broadly divergent ridges, dorsal visceral area bisected by broad median septum, extending from beak to anterior lateral muscle scars, dorsal central and anterior lateral muscle scars placed close together, vascula lateralia of both valves short, submedian, slightly converging, vascula media absent, inner surface of both valves with conspicuous wrinkling directly lateral to vascula lateralia