Gabriellus Fritz, 1992

        G. lanceatus Fritz, 1992

"Genevievella" (Shanan Peters dissertation, 2003, unpubl.)

        “G.” granulatus (Walcott, 1916) - old name was Democephalus granulatus (in Shanan Peters dissertation, 2003, unpubl.)

"Gerospina” (Shanan Peters dissertation, 2003, unpubl.)

        “G.” schachti" (Shanan Peters dissertation, 2003, unpubl.) - old name was Cedaria sp.

Glossocoryphus Deiss, 1939 [This genus is a junior synonym of Elrathiella]

        G. eliffensis Deiss, 1939 = G. typus Deiss, 1939
        G. typus Deiss, 1939 [Montana]

Glossopleura Poulsen, 1927

        G. alta Deiss, 1939 [Montana]

        G. arrecta Resser, 1939b

        G. belesis (Walcott, 1916)

        G. bion (Walcott, 1916)

        G. boccar (Walcott, 1916)

        G. bosworthensis Resser, 1935

        G. californica (Stoyanov & Susuki, 1955)

        G. expansa Poulsen, 1927

        G. fordensis Deiss, 1939 [Montana]

        G. gigantea Resser, 1939a

        G. gomezi (Stoyanov, 1952)

        G. inornata Deiss, 1939 [Montana]

        G. leona Lochman, 1952

        G. lodensis (Clark, 1921)

        G. longifrons Poulsen, 1927

        G. mckeei Resser, 1935

        G. merlinensis Rasetti, 1951

        G. minima Deiss, 1939 [Montana]

        G. mohavensis Resser, 1935

        G. nitida Resser, 1935

        G. packi Resser, 1935

        G. parabola (Hall & Whitfield, 1877) [=G. producta]

        G. perryi Deiss, 1939 [Montana]

        G. producta (Hall & Whitfield)

        G. prona Resser, 1939b

        G. similaris Resser, 1939a

        G. skokiensis Rasetti, 1951

        G. stenorhachis Rasetti, 1951

        G. sulcata Poulsen, 1927

        G. templensis Rasetti, 1951

        G. teres V. Poulsen, 1964

        G. thomsoni Deiss, 1939 [Montana]

        G. torresi (Stoyanov, 1952)

        G. tuta Resser, 1945

        G. utahensis Resser, 1935

        G. walcotti Poulsen, 1927

        G. sp. [Chisholm Shale]

        G. sp. (Carrara Fm.)

        G. n. sp. [Spence Shale]

        G. sp. [Spence Shale]

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

        G. sp. (Glossopleura Zone, Washington)

        G. sp. [Ute Fm., Utah]

Glyphaspis Poulsen, 1927

        G. brevisulcata Deiss, 1939 [Montana]

        G. capella (Walcott, 1916)

        G. concavus Sundberg, 1994

        G.? cf. G.? curticei Resser, 1938 [Pika Fm.]

        G. dearbornensis Deiss, 1939 [Montana]

        G. delicate Deiss, 1939

        G. indenta Deiss, 1939

        G. levis Deiss, 1939 [=Athabaskia belus]

        G. paucisulcata Deiss, 1939 [Montana]
        G. robusta Deiss, 1939 [Montana]

        G. similis Deiss, 1939 [Montana]
        G. storeyi Deiss, 1939 [Montana]

        G. tetonensis Resser, 1937 [Pika Fm.]

        G. sp. [Swasey Formation]

        G. sp. 1 (see Melzak and Westrop, 1994) [Pika Fm.]

        G. sp. 2 (see Melzak and Westrop, 1994) [Pika Fm.]

Goldfieldia Palmer, 1964 [This genus is a junior synonym of Lancastria, fida Blaker & Peel, 1997]

        G. pacifica = Lancastria pacifica (Palmer, 1964)

Goniophrys Ross, 1951

        G. prima Ross, 1951

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

        G. sp. (mentioned in Ross, 1951)

Griffithidella

        G. caballeroensis Brezinski, 2000

        G. doris (Hall, 1860)