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Eoobolus
Classification
Phylum:
Brachiopoda
Class:
Lingulata
Order:
Lingulida
Superfamily:
Linguloidea
Family:
Eoobolidae
Formal Genus Name and Reference:
Eoobolus Matthew, 1902, p. 97, Clivosilingula USHATINSKAYA, 1993b, p. 133
Type Species:
Obolus (Eoobolus) triparilis Matthew, 1902, p. 94, SD ROWELL, 1965a, p. 263
Images
(Click to enlarge in a new window)
Fig. 26, 1a-e. *E. triparilis (Matthew), Bourinot Group, Cape Breton, Canada, $a$, ventral valve exterior, USNM 57013, X4.2, $b$, dorsal valve exterior, ROM 510 CM (A), X4.2, c, ventral valve exterior, USNM 51855a, X4.2, $d$, internal mold of ventral valve, USNM 57013c, x3.3$, e, dorsal internal mold, USNM 57013d, x3.8$ (new).-Fig. 26, 1f-h. E. clivosus (Pelman), Amgaian, Kharbusuonka River, Siberia, $f$, dorsal valve exterior, x3 3 . 3 , }$ PIN $4290 /$ 51, $g$, ornamentation of larval shell, x2250, h$, ornamentation of postlarval shell, PIN 4290/50, X225 (Ushatinskaya, 1993b).——FIG. 26, 1i, j. E. elata (Pelman), Amgaian, Olenek River, Siberia, $i$, dorsal valve interior, PIN 4290/59, x16.7, ~ j$, ventral valve interior, PIN 4290/60, X16.7 (Ushatinskaya, 1993b).
Synonyms
Clivosilingula
Geographic Distribution
Canada, Nova Scotia, lower Middle Cambrian; Pakistan, Salt Range, Botomian; Russia, Siberia, Botomian-Amgaian; Australia, South Australia, Toyonian
Age Range
Beginning Stage in Treatise Usage:
Lower Cambrian (Botomian)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
516.13
Ending Stage in Treatise Usage:
Middle Cambrian (Amgaian)
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
0
Ending Date:
499.63
Description
Shell inequivalved, dorsibiconvex, elongate suboval to subcircular, pedicle groove deep, narrow, subtriangular, both valves with well-developed flexure lines, dorsal pseudointerarea moderately high with broad median groove, visceral areas of both valves slightly thickened anteriorly, dorsal valve usually with fine median ridge and pair of submedian ridges bisecting visceral field, ventral vascula media submarginal, arcuate
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Lingulata
Order:
Lingulida
Superfamily:
Linguloidea
Family:
Eoobolidae
Formal Genus Name and Reference:
Eoobolus Matthew, 1902, p. 97, Clivosilingula USHATINSKAYA, 1993b, p. 133
Type Species:
Obolus (Eoobolus) triparilis Matthew, 1902, p. 94, SD ROWELL, 1965a, p. 263
Images
(Click to enlarge in a new window)
Fig. 26, 1a-e. *E. triparilis (Matthew), Bourinot Group, Cape Breton, Canada, $a$, ventral valve exterior, USNM 57013, X4.2, $b$, dorsal valve exterior, ROM 510 CM (A), X4.2, c, ventral valve exterior, USNM 51855a, X4.2, $d$, internal mold of ventral valve, USNM 57013c, x3.3$, e, dorsal internal mold, USNM 57013d, x3.8$ (new).-Fig. 26, 1f-h. E. clivosus (Pelman), Amgaian, Kharbusuonka River, Siberia, $f$, dorsal valve exterior, x3 3 . 3 , }$ PIN $4290 /$ 51, $g$, ornamentation of larval shell, x2250, h$, ornamentation of postlarval shell, PIN 4290/50, X225 (Ushatinskaya, 1993b).——FIG. 26, 1i, j. E. elata (Pelman), Amgaian, Olenek River, Siberia, $i$, dorsal valve interior, PIN 4290/59, x16.7, ~ j$, ventral valve interior, PIN 4290/60, X16.7 (Ushatinskaya, 1993b).
Synonyms
Clivosilingula
Geographic Distribution
Canada, Nova Scotia, lower Middle Cambrian; Pakistan, Salt Range, Botomian; Russia, Siberia, Botomian-Amgaian; Australia, South Australia, Toyonian
Age Range
Beginning Stage in Treatise Usage:
Lower Cambrian (Botomian)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
516.13
Ending Stage in Treatise Usage:
Middle Cambrian (Amgaian)
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
0
Ending Date:
499.63
Description
Shell inequivalved, dorsibiconvex, elongate suboval to subcircular, pedicle groove deep, narrow, subtriangular, both valves with well-developed flexure lines, dorsal pseudointerarea moderately high with broad median groove, visceral areas of both valves slightly thickened anteriorly, dorsal valve usually with fine median ridge and pair of submedian ridges bisecting visceral field, ventral vascula media submarginal, arcuate