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

Isotelus susae

Trilobita - Asaphida - Asaphidae

Asaphus susae was named by Whitfield (1882) [Asaphus Susæ Calvin in Whitfield. Cfr. Asaphus platycephalus Billings 1863. Geol. Canada p. 184, fig. 183 Cfr. Asaphus platycephalus Billings 1866. Cat. Silur. Foss. Isl. Anticosti p. 24, fig. 7.].

It was recombined as Asaphus (Isotelus) susae by Whiteaves (1897); it was recombined as Isotelus susae by Clarke (1894) and Hopkins (2014).

Sister species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1882Asaphus susae Whitfield p. 236 figs. pl. 5, fig. 3; pl. 10, fig. 8.
1894Isotelus susae Clarke p. 708 figs. 10, 11
1897Asaphus (Isotelus) susae Whiteaves pp. 231 - 232
2014Isotelus susae Hopkins pp. Supplemental Tables 4 & 5

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

EubilateriaAx 1987
phylumArthropodaLatreille 1829
classTrilobitaWalch 1771
orderAsaphidaSalter 1864
superfamilyAsaphoideaSalter 1864
familyAsaphidaeBurmeister 1843
subfamilyIsotelinaeAngelin 1854
genusIsotelusDekay 1824
speciessusae(Whitfield 1882)

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.

No diagnoses are available
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Entire body: yesg
Adult length: 10 to < 100g
Adult width: 10 to < 100g
Spines: noneg
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingo
Life habit: low-level epifaunalo
Diet: deposit feedero
Vision: well-developedf
Created: 2009-06-08 11:29:44
Modified: 2009-06-08 13:29:44
Source: g = genus, f = family, o = order, c = class
References: Aberhan et al. 2004, Hendy 2009, Hendy et al. 2009

Age range: Maysvillian or 452.00000 to 449.50000 Ma

Collections (10 total)

Time interval Ma Country or state Original ID and collection number
Edenian460.9 - 449.5USA (Minnesota) Isotelus susae (23280 23281)
Edenian460.9 - 449.5USA (Illinois, Iowa) Isotelus susae (23807 23808 23809)
Edenian - Maysvillian460.9 - 449.5USA (Minnesota) Isotelus susae (23282)
Edenian - Maysvillian460.9 - 449.5USA (Illinois, Iowa) Isotelus susae (23810)
Maysvillian452.0 - 449.5USA (Minnesota) Isotelus susae (23283)
Maysvillian452.0 - 449.5USA (Illinois, Iowa) Isotelus susae (23811)
Maysvillian452.0 - 449.5Canada (Manitoba) Asaphus susae (174050)