Western Trilobite Association Navigation: Trilobite Genera / Species I Trilobite Formations I Trilobite Locations

TRILOBITE GENERA AND SPECIES LIST
for Genera beginning with letter A

Achlysopsis Fritz, 1968

        A. liokata Fritz, 1968

        A. hemitora Fritz, 1968

        A. typicum (unconfirmed – please contact us if you know this species)

        A. n. sp. [Chisholm Shale]

        A. n. sp. [Spence Shale]

        A. sp. [Spence Shale]

Aciculolenus Palmer, 1965

        A. palmeri Chatterton & Ludvigsen, 1998

Acidiphorus Raymond, 1925 [Goniotelus Ulrich, 1927 is a junior synonym of Acidiphorus, fide BRETT & WESTROP, 1996]

        A.? lineotuberculatus Fortey and Droser, 1999

        A. sp. (mentioned in Ross, 1951) (formerly Goniotelus sp.)

Agnostotes Opik, 1963

        A. clavata (Lu in Wang, 1964)

Agnostus Brongniart, 1822 [This genus is not recognized in Cambrian of western North America]

        A. bonnerensis Resser, 1938 [is now Peronopis]

        A. brevispinus Deiss, 1939 [is now Peronopis]

        A. hastatus Deiss, 1939 [reassigned to Peronopis montis]

        A. robustus Deiss, 1939 [reassigned to Peronopis montis]
Albertella Walcott, 1908

        A. fritzi Eddy and McCollum, 1998

        A. helena Walcott, 1908
        A. highlandensis Eddy and McCollum, 1998

        A. longwelli Palmer in Palmer & Halley, 1979

        A. microps Rasetti, 1951

        A. proveedora Lochman 1952
        A. schenki Resser, 1945

        A. spectrensis Palmer in Palmer & Halley, 1979

        A. ? sp. [Langston Fm., Spence Shale]

        A. sp. [Pioche Shale - not sure which species this is]

        A. ? sp. (Metaline Fm.)
Albertellina Palmer in Palmer & Halley, 1979

        A. aspinosa Palmer in Palmer & Halley, 1979

Albertelloides Fritz, 1968

        A. dispar (Resser, 1939b)

        A. kitai Eddy and McCollum, 1998

        A. maladensis (Resser, 1939b)

        A. mischi Fritz, 1968

        A. pandispinata Fritz, 1968
        A. rectimarginatus Palmer in Palmer & Halley, 1979
        A. cf. rectimarginatus Palmer in Palmer & Halley, 1979

        A. sp. [Twin Knobs Fm.]

Alokistocare Lorenz, 1906

        A. charax

        A. harrisi (see Altiocculus harrisi)

        A. idahoense (see Amecephalus idahoense)

        A. laticaudum (see Amecephalus laticaudum)

        A. pananotatum Rasetti, 1951

        A. scapegoatensis Deiss, 1939a [Montana]

        A. septum Resser, 1939a

        A. spencense

        A. subcoronatum (Hall & Whitfield, 1877)

        A. swasii (Sundberg, 1994)

        A. sp. [Wheeler Shale]

        A. sp. [Chisholm Fm.]

Alokistocarella Resser, 1938b

        A. brighamensis Resser 1939b

        A. mexicana Lochman, 1952 [Arrojos Fm., Caborca, Mexico]

        A. occidens Resser 1939b

        A. spencei Resser, 1939a

Altiocculus Sundberg, 1994

        A. concavus Sundberg, 1994

        A. drumensis Sundberg, 1994

        A. harrisi (Robison, 1971)

        A. sp. [Wheeler Shale]

        A. sp. [Marjum Fm.]

Amblycranium Ross, 1951

        A. cornutum Ross, 1951

        A.? populus Ross, 1951

        A. variabile Ross, 1951

Amecephalites Eddy and McCollum, 1998

        A. sundbergi Eddy and McCollum, 1998

Amecephalus Walcott, 1924 (includes Strotocephalus Resser, 1935)

        A. agnesensis (Walcott, 1917b)

        A. alta Fritz, 1968

        A. althea Walcott, 1916 [Arrojos Fm., Caborca, Mexico]

        A. arrojosensis (Lochman, 1952) [Arrojos Fm., Caborca, Mexico; Carrara, Emigrant, Monola, and Pioche formations in the southern Great Basin]

        A. cleora (Walcott, 1917b)

        A. diffundatus

        A. gordonensis (Resser, 1935) [=S. gordonensis Resser, 1935]

        A. idahoense (Resser 1939a) (not idahoensis)

        A. laticaudum (Resser 1939a)

        A. modestum (Lochman, 1952) [Arrojos Fm., Caborca, Mexico]

        A. packi (Resser, 1935)

        A. piochensis (Walcott, 1886)

        A. sp. A Sundberg and McCollum, 2000

        A. sp. unident.

        A. sp. [Chisholm Shale]

        A. sp. (Glossopleura Zone, Washington)

        n. sp. aff. Piochaspis [Chisholm Shale]

        A. n. spp. [Spence Shale]

        A. sp. 1 [Spence Shale]

        A.? sp. [Twin Knobs Fm.]

Amechilus Ross, 1951

        A. palaora Ross, 1951

Ameropiltonia

        A perplexa Brezinski, 2000

Ameura

        A. sangamonensis (Meek & Worthen)

Ammagnostus Opik, 1967

        A. beltensis

Ampyxina Ulrich, 1922 (or Ampyxoides? Whittington, 1965)

        A. n. sp. [Antelope Valley / Ninemile Fms.]

Ampyxoides Whittington, 1965

        A. cf. occipitalis Dean, 1973

        A. trigranulatus Palmer, 1960

Anomalocephalus Deiss, 1939 [Montana] [= Ehmaniella, fide HOWELL in MOORE, 1959]

        A. ornatus Deiss, 1939 [= Ehmaniella ornatus (Deiss, 1939)] [Montana]

Anomocare Angelin, 1851

        A. sp. [Langston Fm., Spence Shale]

Anoria Walcott, 1924

        A. baton Walcott, 1916b [Montana]

        A. tontoensis (Walcott, 1916) [Arizona]

Apatolichas Whittington, 1963

        A. cf. jukesi (Billings, 1865)

        A. sp. [Antelope Valley Fm.]

Aphelaspis [Labiostria is a junior synonym of Aphelaspis, fide PALMER, 1965, although this is debated (see Chatterton & Ludvigsen, 1998)]
        A. westropi (Labiostria westropi)

Arapahoia

        A. sp. (Weeks Fm.)

Archaeaspis Repina in Khomentovskii and Repina, 1965

        A. macropleuron Lieberman, 2002

        A. nelsoni Lieberman, 2002

Arcuolenellus Palmer & Repina, 1993

        A. arcuatis (Palmer, in Palmer & Halley 1979)

        A. cf. megafrontalis (Vaccari)

Asaphellina Munier-Chalmas & Bergeron in Bergeron, 1889

        A.? sp. Ross, 1951

Asaphellus Callaway, 1877

        A.? eudocia (Walcott, 1925)

        A.? sp. A Ross, 1951

        A.? sp. B Ross, 1951

Asaphiscus Meek, 1873

        A. wheeleri Meek, 1873

Aspidagnostus

        A. sp. (Weeks Fm.)

Athabaskia Raymond, 1928
        A. belus (Walcott, 1916b) [Montana]

        A. bithus (Walcott, 1916)

        A. howelli (Walcott, 1886)

        A. wasatchensis (Resser, 1939b)

        A. n. sp.

        A. n. sp. [Spence Shale]

Australosutura

        A. llanoensis Brezinski, 1998

        A. sp. (in Brezinski, 2000)