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Ischyrotoma twenhofeli

Trilobita - Proetida - Dimeropygidae

Taxonomy
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

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderProetidaFortey and Owens 1975
familyDimeropygidaeHupe 1953
genusIschyrotoma
speciestwenhofeli

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
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Diagnosis
No diagnoses are available
Measurements
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)