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Illaenoides elongata

Trilobita - Corynexochida - Styginidae

Taxonomy
Illaenoides elongata was named by Thomas (1929). Its type specimen is YPM 26122, a cephalon/head, and it is a 3D body fossil.

Synonymy list
YearName and author
1929Illaenoides elongata Thomas p. 6 figs. pl. 1, figs 8,9
2021Illaenoides elongata Holloway pp. 6 - 9 figs. Plate 1; Plate 2, Figs 1–23, 29

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderCorynexochida
familyStyginidaeVogdes 1890
genusIllaenoidesWeller 1907
specieselongataThomas 1929

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.

Illaenoides elongata Thomas 1929
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Diagnosis
ReferenceDiagnosis
D. J. Holloway 2021Cranidium curving through about 110°–120° in lateral profile, vertical or only slightly overhanging anteriorly in dorsal view; axial furrow converging strongly forwards immediately in front of posterior cephalic margin, thereafter subparallel as far as lunette, very short and weak in front of lunette; glabella with slight independent convexity (tr.) posterior to lunette, lacking independent convexity farther forward; anterior branch of facial suture converging weakly forwards.
Measurements
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: actively mobileo
Life habit: nektobenthico
Diet: carnivoreo
Vision: well-developedf
Created: 2009-12-14 23:37:50
Modified: 2009-12-15 01:37:50
Source: f = family, o = order, c = class
References: Aberhan et al. 2004, Whittington et al. 1997, Hendy et al. 2009

Age range: Wenlock or 433.40000 to 427.40000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Wenlock433.4 - 427.4USA (Arkansas) Illaenoides elongata (229058)