LSJU loc. 2121 [Round Mountain Silt] (Miocene of the United States)

Where: Kern County, California (35.4° N, 118.8° W: paleocoordinates 35.3° N, 113.6° W)

• coordinate stated in text

When: Round Mountain Formation, Langhian (16.0 - 13.8 Ma)

• Stratigraphic horizon: lowermost part of Round Mountain silt. AGE: Changed to Langhian and "Round Mountain Silt" following EPICC stratigraphic revision.

Environment/lithology: marine; poorly lithified, gray siltstone

Size class: macrofossils

Collected by D. B. Birch, R. T. White, L. T. Martin, E. A. Watson, A. M .Keen in 1938 - 1940

• Collectors: Donald C Birch, 1938; Robert T. White, 1939; Lois T. Martin and Elizabeth A. Watson, 1940; A. Myra Keen, 1939.

Primary reference: A. M. Keen. 1943. New mollusks from the Round Mountain Silt (Temblor) Miocene of California. Transactions of the San Diego Society of Natural History 10(2):25-60 [J. Marcot/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 206393: authorized by Jonathan Marcot, entered by Jonathan Marcot on 14.11.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Nuculanida - Yoldiidae
"Yoldia temblorensis" = Yoldia (Yoldia) temblorensis, "Yoldia oregona" = Yoldia (Kalayoldia) oregona
"Yoldia temblorensis" = Yoldia (Yoldia) temblorensis Anderson and Martin 1914 clam
"Yoldia oregona" = Yoldia (Kalayoldia) oregona Shumard 1858 clam
 Nuculanida - Nuculanidae
"Nuculana ochsneri" = Nuculana (Saccella) ochsneri
"Nuculana ochsneri" = Nuculana (Saccella) ochsneri Anderson and Martin 1914 pointed nut clam
 Nuculida - Nuculidae
"Nucula (Ennucula) birchi n. sp." = Nucula (Leionucula) birchi
"Nucula (Ennucula) birchi n. sp." = Nucula (Leionucula) birchi Keen 1943 nut clam
 Pectinida - Pectinoidae
"Aequipecten andersoni" = Pacipecten andersoni
"Aequipecten andersoni" = Pacipecten andersoni Arnold 1906 scallop
as Aequipecten andersoni barkerianus ?
 Arcida - Arcidae
Anadara osmonti Dall 1909 ark
 Pandorida - Pandoridae
 Cardiida - Tellinidae
Tellina wilsoni Anderson and Martin 1914 tellin clam
"Tellina (Peronidia) oldroydi" = Tellina (Eurytellina) oldroydi Wiedey 1928 tellin clam
Tellina (Arcopagia) ocoyana Conrad 1855 tellin clam
"Tellina cf. arctata" = Macoma (Psammacoma) arctata Conrad 1849 tellin clam
Macoma (Rexithaerus) copelandi Wiedey 1928 tellin clam
 Cardiida - Donacidae
Donax sp., "Bornia (Temblornia) triangulata" = Donax triangulata
Donax sp. Linnaeus 1758 clam
"Donax n. sp"
"Bornia (Temblornia) triangulata" = Donax triangulata Anderson and Martin 1914 clam
 Cardiida - Mactridae
"Mactra sectoris" = Mactromeris sectoris
"Mactra sectoris" = Mactromeris sectoris Anderson and Martin 1914 clam
 Cardiida - Veneridae
Dosinia (Dosinidia) margaritana Wiedey 1928 venus clam
Chione (Chione) temblorensis Anderson 1905 venus clam
"Chione (Lirophora) latilaminosa" = Chione (Anomalocardia) latilaminosa Anderson and Martin 1914 venus clam
Transennella joaquinensis Anderson and Martin 1914 venus clam
 Cardiida - Ungulinidae
"Taras buwaldana" = Diplodonta (Diplodonta) buwaldana Anderson and Martin 1914 clam
 Lucinida - Lucinidae
"Miltha sanctaecrucis" = Miltha (Miltha) sanctaecrucis, "Lucinisca menuda n. sp." = Lucina (Lucinisca) menuda
"Miltha sanctaecrucis" = Miltha (Miltha) sanctaecrucis Arnold 1909 clam
"Lucinisca menuda n. sp." = Lucina (Lucinisca) menuda Keen 1943 clam
Scaphopoda
 Dentaliida - Rhabdidae
"Dentalium petricola" = Rhabdus rectius
"Dentalium petricola" = Rhabdus rectius Carpenter 1864 tusk shell
 Dentaliida - Dentaliidae
Dentalium conradi Dall 1909 tusk shell
Gastropoda
 Opisthobranchia - Cylichnidae
Cylichna temblorensis n. sp. Keen 1943 snail
? Cylichna loismartinae n. sp. Keen 1943 snail
 Opisthobranchia - Retusidae
Volvulella gluma Keen 1943 snail
 Opisthobranchia - Bullidae
Bulla cantuaensis Anderson and Martin 1914 snail
 Heterostropha - Acteonidae
"Acteon boulderana" = Acteon boulderanus
"Acteon boulderana" = Acteon boulderanus Etherington 1931 snail
 Heterostropha - Pyramidellidae
"Chrysallida rotundomontana n. sp." = Odostomia (Besla) rotundomontana Keen 1943 snail
Turbonilla (Pyrgolampros) mariposa n. sp. Keen 1943 snail
Turbonilla (Pyrgiscus) bravoensis n. sp. Keen 1943 snail
Odostomia (Evalea) andersoni Bartsch and Hertlein 1917 Brea owl
"Pyramidella cooperi" = Pyramidella (Longchaeus) cooperi Anderson and Martin 1914 snail
"Syrnola scandix n. sp." = Pyramidella (Syrnola) ochsneri Anderson and Martin 1914 snail
 Neotaenioglossa - Calyptraeidae
Crepidula rostralis Conrad 1865 slipper shell
Calyptraea filosa Gabb 1866 slipper shell
 Sorbeoconcha - Vitrinellidae
"? Teinostoma (Teinostoma) lens n. sp." = Vitrinella (Vitrinellops) lens
"? Teinostoma (Teinostoma) lens n. sp." = Vitrinella (Vitrinellops) lens Keen 1943 snail
 Sorbeoconcha - Ficidae
"Ficus (Trophosycon) ocoyana" = Ficus (Trophosycon) ocoyanus
"Ficus (Trophosycon) ocoyana" = Ficus (Trophosycon) ocoyanus Conrad 1855 fig shell
 Neogastropoda - Muricidae
"Trophon kernensis" = Trophon (Austrotrophon) kernensis Anderson 1905 murex snail
Typhis (Talityphis) lampada n. sp. Keen 1943 murex snail
 Neogastropoda - Cancellariidae
Cancellaria simplex Anderson 1905 snail
"Cancellaria ramonensis" = Cancellaria oregonensis Conrad 1865 snail
Cancellaria pacifica Anderson 1905 snail
"Cancellaria dalliana" = Cancellaria (Euclia) dalliana Anderson 1905 snail
"Cancellaria condoni" = Cancellaria (Euclia) condoni Anderson 1905 snail
 Neogastropoda - Olividae
"Olivella ischnon" = Olivella (Olivella) ischnon
"Olivella ischnon" = Olivella (Olivella) ischnon Keen 1943 olive snail
 Neogastropoda - Clavatulidae
Turricula ochsneri Anderson and Martin 1914 snail
Turricula piercei Arnold 1909 snail
"Turricula buwaldana" = Turricula bulwaldana Anderson and Martin 1914 snail
 Neogastropoda - Conidae
Conus owenianus Anderson 1905 cone shell
 Neogastropoda - Mangeliidae
Mangelia kernensis Anderson and Martin 1914 snail
 Neogastropoda - Terebridae
"Terebra cooperi" = Terebra (Terebra) cooperi, Hastula gnomon n. sp.
"Terebra cooperi" = Terebra (Terebra) cooperi Anderson 1905 auger snail
Hastula gnomon n. sp. Keen 1943 auger snail
 Neogastropoda - Turridae
Megasurcula howei, "Moniliopsis electilis n. sp." = Ophiodermella electilis
Megasurcula howei Hanna and Hertlein 1938 turrid
"Moniliopsis electilis n. sp." = Ophiodermella electilis Keen 1943 turrid
 Neogastropoda - Nassariidae
Nassarius arnoldi Anderson 1905 snail
Nassarius antiselli Anderson and Martin 1914 snail
"Nassarius ocoyanus" = Nassarius (Phrontis) ocoyanus Anderson and Martin 1914 snail
"Nassarius blakei" = Nassarius (Phrontis) ocoyanus Anderson and Martin 1914 snail
 Neogastropoda - Columbellidae
Mitrella (Mitrella) anchuela n. sp. Keen 1943 snail
Anachis watsonae n. sp. Keen 1943 snail
 Neogastropoda - Buccinidae
"Phos (Antillophos) dumbleana" = Antillophos, "Amphissa posunculensis" = Antillophos posunculensis
"Phos (Antillophos) dumbleana" = Antillophos true whelk
"Amphissa posunculensis" = Antillophos posunculensis Anderson and Martin 1914 true whelk
 Neogastropoda - Siphonaliidae
 Sorbeoconcha - Naticidae
Natica posuncula Hanna and Hertlein 1938 moon snail
Sinum scopulosum Conrad 1849 moon snail
Neverita andersoni Clark 1918 moon snail
"Neverita callosa" = Glossaulax reclusiana Deshayes 1839 moon snail
 Epitonioidea - Epitoniidae
Ferminoscala durhami n. sp., "Ferminoscala whitei n. sp." = Scalina whitei, Epitonium cf. indianorum
Ferminoscala durhami n. sp. Keen 1943 wentletrap
"Ferminoscala whitei n. sp." = Scalina whitei Keen 1943 wentletrap
Epitonium cf. indianorum Carpenter 1864 wentletrap
 Vanikoroidea - Eulimidae
Balcis conchita n. sp. Keen 1943 snail
Eulima gabbiana Anderson and Martin 1914 snail
 Cerithioidea - Turritellidae
Turritella ocoyana Conrad 1855 turret shell
 Trochoidea - Trochidae