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Olenellus (Paedeumias) puertoblancoensis

Trilobita - Redlichiida - Olenellidae

Paedeumias puertoblancoensis was named by Lochman (1952). Its type specimen is U.S.N.M. No.115703, a cephalon/head, and it is a mold.

It was recombined as Olenellus puertoblancoensis by Palmer and Halley (1979); it was recombined as Olenellus (Paedeumias) puertoblancoensis by Sundberg and McCollum (2003).

Sister species lacking formal opinion data

Synonymy list
YearName and author
1952Paedeumias puertoblancoensis Cooper et al. pp. 94-95 figs. 9-16
1952Paedeumias puertoblancoensis Lochman pp. 94-95 figs. 9-16
1979Olenellus puertoblancoensis Palmer and Halley p. 74 figs. Plate 4, figures 11, 14
2003Olenellus (Paedeumias) puertoblancoensis Sundberg and McCollum p. 953 figs. Plate 1, ®gures 2±3

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EubilateriaAx 1987
phylumArthropodaLatreille 1829
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderRedlichiidaRichter 1932
genusOlenellusHall 1861

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.

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G. A. Cooper et al. 1952The species is very close to P.transitans Walcott. It appears to differ from that species only in the more rounded anterior lobe of the glabella and the straight posterior margin of the cephalon. As the type of P.transitans is a flattened, somewha tcrushed shale specimen, the author is unable to determine how much the difference in matrix has affected these details of the cephalon. She considers it feasible for the present to describe the Mexican material as a new species but to call attention to its close relation to P.transitans. In studying the species of Paedeumias the author concluded that nearly all the same features listed for Olenelliis constitute features of specific value in Paedeumias, i.e. (i) length of eye, (2) shape of anterior glabellar lobe, (3) width of brim and structure of median anterior ridge. In Paedeumias, however, there appears to be no variation in the width of the border, the narrow, rim like border being apparently a generic character.
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: majorg
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingo
Life habit: low-level epifaunalo
Diet: deposit feedero
Vision: well-developedf
Created: 2009-02-25 08:45:18
Modified: 2009-02-25 12:04:51
Source: g = genus, f = family, o = order, c = class
References: Hendy et al. 2009, Aberhan et al. 2004, Whittington et al. 1997, Hendy 2009
No collection or age range data are available