Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Griffithidella alternata

Trilobita - Proetida - Phillipsiidae

Taxonomy
Proetus roundyi alternatus was named by Girty (1926). Its type specimen is USNM 3524-3526 and is a 3D body fossil.

It was recombined as Griffithidella depressus alternatus by Hessler (1965); it was recombined as Griffithidella (Griffithidella) depressa alternata by Hahn and Hahn (1970); it was recombined as Griffithidella alternata by Brezinski (1998); it was recombined as Griffithidella alternatus by Wagner (2020).

Synonymy list
YearName and author
1926Proetus roundyi alternatus Girty p. 40 figs. plate 6, figures 13a, b, 15a, b
1965Griffithidella depressus alternatus Hessler p. 255 figs. plate 38, figures 3, 6 - 8 , 10, 11, 14
1970Griffithidella (Griffithidella) depressa alternata Hahn and Hahn pp. 197 - 198
1998Griffithidella alternata Brezinski p. 723 figs. 3.24-3.28
2020Griffithidella alternatus Wagner

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Ecdysozoa
—Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderProetidaFortey and Owens 1975
superfamilyProetoideaHawle and Corda 1847
familyPhillipsiidaeOehlert 1886
genusGriffithidellaHessler 1965
speciesalternata(Girty 1926)

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

show all | hide all
Diagnosis
ReferenceDiagnosis
D. K. Brezinski 1998Pygidium outline semicircular, moderately vaulted with low relief to surface features. Axis rounded in transverse profile with indistinct shoulders, arched in longitudinal profile, extending to posterior border, composed of 10 to 11 rings. Rings broad, ring furrows shallow, narrow, straight, sharp. Pleural fields evenly convex, with pleural and interpleural furrows narrow, distinct, extending to border, but not onto it. Seven ribs evenly divided into two bands of near equal width. Border furrow shallow to indistinct, border broad, convex, of nearly equal width around entire pygidial margin.