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Authors: |
Imlay, Ralph W.
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| Editors: |
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| Date: |
/1967 |
| Title: |
The Mesozoic Pelecypods Otapiria Marwick and Lupherella Imlay, New Genus, in the United States |
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573-B , , 11 , 2 pls |
| Host: |
U.S. Geological Survey Professional Paper: |
| Document Type: |
Article\Abst.\Chapter\report |
| Annotation: |
Abstract: The pelecypod genera Otapiria Marwick and Lupherella Imlay, n. gen., both resembling the late Triassic genus Monotis, are recorded for the first time from Mesozoic beds in the United States. Lupherella is represented by L. bocchiformis (Hyatt) from beds of Pliensbachian age in eastern Oregon and California. It has not been found elsewhere. One species of Otapiria, named O. tailleuri Imlay, n. sp., has been found in northern Alaska associated with or directly underlying Inoceramus cf. I. lucifer Eichwald, whose presence indicates an early Middle Jurassic or late Early Jurassic age not older than Toarcian. Another species, referred to as O. sp. undet., has been found as float in the upper Yukon Valley in east-central Alaska. Its age is unknown, but the presence of the crinoid Pentacrinus subangularis var. alaska Springer in the same float indicates that beds of Early Jurassic age are present in the area. Otapiria has been found previously in Upper Triassic to Upper Jurassic beds in New Zealand, Lower Jurassic beds in New Caledonia, and Upper Triassic to Lower Jurassic beds in northeastern Siberia. |
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51ATr94
(Mesozoic loc. 24060)
, Howard Pass
, I.L. Tailleur, 1951. Limestone on east side of Ipnavik River. Lat. 68 deg. 40.50' N., long. 157 deg. 03.75' W. (description from Imlay, 1967, p. B6)
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Otapiria tailleuri Imlay n. sp.
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64T305 and 64AS321
(Mesozoic loc. M2451)
, Howard Pass
, Sigmund Snelson and I.L. Tailleur, 1964. Organic shale, chert and limestone about 60 feet thick which may be conformable downward with the Shublik Formation and which is less than 20 feet below a clay shale unit that contains Buchia of Early Cretaceous (Valanginian) age. Lat. 68 deg. 37.62' N., long. 156 deg. 43.05' W., NE1/4 sec. 36, T. 9 S., R. 21 W., Howard Pass quad. (description from Imlay, 1967, p. B6)
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Otapiria tailleuri Imlay n. sp.
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65ATr73.5
(Mesozoic loc. 29280)
, Howard Pass
, (=64 Snelson 321 and 64T305). Howard Pass quad. at 68 deg. 37'30" N., 156 deg. 42'30" W; sec. 36, T. 9 S., R. 21 W.; south of Lisburne Ridges. Same locality as 64T305 and 64 Shell. Additional fossils from Otapiria zone. [I.L. Tailleur, 1965, Same locality data as Mesozoic loc. M2451. (description from Imlay, 1967, p. B6)-*NOTE by R.B. Blodgett lat.long date slightly different here: lat 68 deg. 37.62' N., long 156 deg. 43.05' W]
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Otapiria tailleuri Imlay n. sp.
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64APa224
(Mesozoic loc. M2318)
, Chandler Lake
, Cutbank exposures on east side of Tiglukpuk Creek. "Topmost Shublik Fm" [W.W. Patton, Jr., 1964. Cutbank on east side of Tiglukpuk Creek, south flank of Tiglukpuk Creek anticline. Lat. 68 deg. 21.24' N., long 151 deg. 52.35' W., Chandler Lake quad. (description from Imlay, 1967, p. B6)]
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Otapiria tailleuri Imlay n. sp.
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65ATr123B
(Mesozoic loc. 29281 (Imlay 1981 report); Mesozoic loc. M2949 (Jones report))
, Chandler Lake
, I.L. Tailleur, 1965. East wall of Tiglukpuk Creek on south flank of Tiglukpuk anticline, lat 68 deg. 21'15" N., long 151 deg. 52'30" W., Chandler Lake quadrangle, northern Alaska. Unnamed beds overlying Shublik Formation. Early Pliensbachian or latest Sinemurian. (from Imlay, 1981, p. 24)[Tailleur's transmittal sheet for Jones E&R report states: "Chandler Lake quad. at 68 deg. 21'15" N., 151 deg. 52'30" W.; bank on east side of Tiglukpuk Creek. Coquina in mudstone and with wacke."] [Imlay E&R report of 12/6/1965 states "Exposures on east wall of Tiglukpuk Creek on south flank of Tiglukpuk Creek anticline. Lat. 68 deg. 21'15" N., Long. 151 deg. 52'30" W., Chandler Lake Quad., Alaska. Rubble from bedrock of Otapiria zone above Shublik] [I.L. Tailleur, 1965. Talus on cutbank at Mesozoic loc. M2318. (description from Imlay, 1967, p. B6)]
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Otapiria tailleuri Imlay n. sp.
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65ATr149.4
(Mesozoic loc. 29282)
, Chandler Lake
, I.L. Tailleur, 1965. Southwest wall of Firestone Creek, a tributary of Tiglukpuk Creek, just north of mountain front, lat 68 deg. 18'15" N., long 151 deg. 48'00" W., Chandler Lake quadrangle, northern Alaska. Float from unnamed beds overlying Shublik Formation. Early Pliensbachian or latest Sinemurian. (from Imlay, 1981, p. 24) [Imlay E&R report of 12/6/65 states: "From outcrop and talus on southwest wall of Firestone Creek valley (tributary to Tiglukpuk Creek) just north of mountain front. Lat. 68 deg. 18'15" N., Long. 151 deg. 48'00" W., Chandler Lake Quad., Alaska. Float of Otapiria unit up-section from Shublik"] [I.L. Tailleur, 1965. Float on southwest wall of Firestone Creek (tributary of Tiglukput Creek) just north of mountain front, about 5 miles south-southeast of loc. 29281. Lat. 68 deg. 18.32' N., long 151 deg. 48.3' W., Chandler Lake quad. (description from Imlay, 1967, p. B6)]
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Otapiria tailleuri Imlay n. sp.
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64APa206
(Mesozoic loc. M2317)
, Chandler Lake
, Cutbank exposures on east side of Erratic Creek. "Uppermost Shublik Fm" [W.W. Patton, Jr., 1964. Cutbank on east side of Erratic Creek. Lat. 68 deg. 23.25' N., long. 150 deg. 52.05' W., Chandler Lake quad. (description from Imlay, 1967, p. B6)]
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Otapiria tailleuri Imlay n. sp.
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65ATr152.2.2
(Mesozoic loc. 29284)
, Chandler Lake
, At same place as loc. 65ATr152.2.1 but 6 feet above top of Shublik Formation. [I.L. Tailleur, 1965. Calcareous layer and lens 6 feet above top of Triassic beds. Cutbank on west side of Erratic Creek in anticlinal nose. Lat 68 deg. 23.05' N., long 150 deg. 52.1' W., Chandler Lake quad. (description from Imlay, 1967, p. B6)]
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Otapiria tailleuri Imlay n. sp.
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65ATr153.2
(Mesozoic loc. 29287)
, Chandler Lake
, Dark limestone and shale about 10 feet above top of Shublik Formation. Exposures on east side of Erratic Creek near loc. 65ATr152.2.1. Lat. 68 deg. 22'00" N., Long. 150 deg. 52'30" W., Chandler Lake Quad., Alaska. [I.L. Tailleur, 1965. Dark limestone and shale apparently within 10 feet of top of Triassic beds. Outcrop on east wall of Erratic Creek, about half a mile downstream from Mesozoic loc. 29284 at about same location as M2317. (description from Imlay, 1967, p. B6)]
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Otapiria tailleuri Imlay n. sp.
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65ATr159.2
(Mesozoic loc. 29285)
, Philip Smith Mts
, Philip Smith Mtns. quad. at 68 deg. 29'00" N, 149 deg. 14'00" W; cutbank and cliff on north side of middle Atigun gorge. From 6 ft. interval on top of Shublik Formation. [I.L. Tailleur, 1965. Lower 6 feet of shale directly overlying the Triassic. Cutbank and cliff in north side of Atigun Gorge. Lat. 68 deg. 29.0' N., long. 149 deg. 14' W., Phillip Smith Mountains quad. (description from Imlay, 1967, p. B6)]
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Otapiria tailleuri Imlay n. sp.
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