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Geisina
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Palaeocopida
Suborder:
Kloedenellocopina
Superfamily:
Kloedenellacea
Family:
Geisinidae
Formal Genus Name and Reference:
Geisina JOHNSON, 1936
Type Species:
Beyrichiella gregaria Ulrich & BASSLER, 1906
Images
(Click to enlarge in a new window)
Fig. 122,3. *G. gregaria (ULRICH & BASSLER), U.Penn., USA (Mo.) ; RV (syntype) lat., X40 (Sohn, n)
Synonyms
Nuferella, ?Perprimitia, Hastifaba, ?Neobeyrichiopsis, ?Perijonesina, ?Prosopeionum
Geographic Distribution
N.Am.-Eu.-Asia
Age Range
Beginning Stage in Treatise Usage:
Dev., Miss.
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Bisulcate, with anterior sulcus shallow or missing, RV overlapping LV to cardinal angles, hinge incised behind sulcus; posterodorsal spine present.
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Palaeocopida
Suborder:
Kloedenellocopina
Superfamily:
Kloedenellacea
Family:
Geisinidae
Formal Genus Name and Reference:
Geisina JOHNSON, 1936
Type Species:
Beyrichiella gregaria Ulrich & BASSLER, 1906
Images
(Click to enlarge in a new window)
Fig. 122,3. *G. gregaria (ULRICH & BASSLER), U.Penn., USA (Mo.) ; RV (syntype) lat., X40 (Sohn, n)
Synonyms
Nuferella, ?Perprimitia, Hastifaba, ?Neobeyrichiopsis, ?Perijonesina, ?Prosopeionum
Geographic Distribution
N.Am.-Eu.-Asia
Age Range
Beginning Stage in Treatise Usage:
Dev., Miss.
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Bisulcate, with anterior sulcus shallow or missing, RV overlapping LV to cardinal angles, hinge incised behind sulcus; posterodorsal spine present.