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

Ischyrotoma twenhofeli

Trilobita - Proetida - Dimeropygidae

Ischyrotoma twenhofeli was named by Raymond (1925). Its type specimen is YPM 13055, a cephalon/head, and it is a mold. It is the type species of Ischyrotoma.

Synonymy list
YearName and author
1925Ischyrotoma twenhofeli Raymond pp. 54-55 figs. Pl. 3, figs 1, 2

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

EubilateriaAx 1987
phylumArthropodaLatreille 1829
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderProetidaFortey and Owens 1975
familyDimeropygidaeHupe 1953

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.

Ischyrotoma twenhofeli Raymond 1925
show all | hide all
No diagnoses are available
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Adult length: 10 to < 100g
Adult width: 10 to < 100g
Adult height: 1.0 to < 10g
Spines: noneg
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingc
Life habit: low-level epifaunalc
Diet: deposit feedero
Vision: well-developedf
Created: 2009-06-10 08:14:46
Modified: 2009-06-10 10:14:46
Source: g = genus, f = family, o = order, c = class
References: Aberhan et al. 2004, Fortey and Owens 1999, Hendy 2009, Alvarez et al. 2008

Age range: Llanvirn or 468.00000 to 458.40000 Ma

Collections (3 total)

Time interval Ma Country or state Original ID and collection number
Whiterockian470.0 - 457.3Norway (Spitsbergen) Ischyrotoma twenhofeli (106480)
Whiterockian470.0 - 457.3Canada (Newfoundland and Labrador) Ischyrotoma twenhofeli (104752)
Llanvirn468.0 - 458.4Canada (Newfoundland and Labrador) Ischyrotoma twenhofeli (78099)