Conus owenianus                    (Anderson, 1905)

Conus owenianus ynezanus    (Loel & Corey, 1932)

 

 

Shell small, conical; spire moderate, conical; whorls flattened, or concave above; suture impressed on young shells; aperture narrow, and straight; surface marked by distant, fine revolving lines.  This species is unlike C. califoruica Gabb in having a  lower and less rounded spire, a less ovate outline, and a narrow straight aperture (1). 


Occurrence. — This shell occurs in the Lower Miocene beds  of  Kern River. 



Conus owenianus ynezanus is a slender form of Conus owenianus with a somewhat concave bofy-whorl profile. Specimens closely approaching this form are in the collections from the Round Montain silt. The pattern of spiral sculpture is barely discernible on the holotype.

 

 

Conus owenianus (1)

Plate XV, Figs. 58 and 59

Miocene

Kern River – California

 

Conus owenianus

 

 

Conus owenianus ynezanus ( Loel & Corey 1932 )

California Univ. Mus. Paleontology 31577

Vaqueros formation - Miocene

California

 

Conus owenianus ynezanus (4)

( Loel & Corey 1932 )

Paratype 794

FIGURES 1-8, 32, 37.

Conus (Chelyconus) owenianus (5)Anderson (p. 122).

 

1, 5-8, 32, 37: Lower part of the Round Mountain Silt, middle Miocene.

1. Height 26.5 mm, width 14.3 mm. USNM 650221.USGS Cenozoic loc. M1612.

5. Stout form. Height 19.3 mm, width 13.3 mm. USNM 650222. USGS loc. 6622.

6. Slender form. Height 22 mm, width 10.9 mm. UCMP 36932. UCMP loc. B1637.

7. Slender form. Height 24.7 mm, width 11.6 mm. USNM 650223. USGS Cenozoic loc. M1618.

8. Height 15.9 mm, width 9 mm. USNM 650224. USGS Cenozoic loc. M1612.

32. Height 7.2 mm, width 3.1 mm. UCMP 36933. UCMP loc. B1637.

37. Stout form. Height 20 mm, width 14 mm. USNM 650225. USGS Cenozoic loc. M1608.

 

2-4. Height 23.8 mm, width 13.2 mm. UCMP 36934.

Upper part of the Olcese Sand, middle Miocene. UCMP loc. B1600.

 

 

 

 

 

Conus owenianus

mm. 19

Miocene - Olcese Sands Formation

California

 

 

 

 


Bibliografia Consultata

 

·         (1) - Anderson (1905)  “A Stratigraphic study in the Mount Diablo range of California”

·         (2) - Wiedey (1928)  “Transactions of the San Diego Society of the Natural History, Vol.V n.0 – Notes on the Vaqueros and Temblor formation of the California miocene…”

·         (3) - Loel, W., and Corey, W. H., 1932. The Vaqueros Formation, Lower Miocene of California. University of California Publications in Geological Sciences, 22 (3 ): 31 -410

·         (4) - Wilson (1966) “Type specimens of fossil invertebrates in the San Diego Natural History Museum”

·         (5) - Addicott (1970) “Miocene Gastropods and Biostratigraphy of the Kern River Area, California”