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Walencrinuroides rarus

Trilobita - Phacopida - Encrinuridae

Ceraurus rarus was named by Walcott (1877) [Type specimen at FMNH. According to Moss & Westrop (2014): Not Encrinuroides c.f. rarus sensu Ludvigsen 1975 pl. 3, figs. 22, 23 [= W. rolfi n. sp.]. Not Encrinuroides c.f. rarus sensu Ludvigsen 1978 pl. 2, fig. [= W. rolfi n. sp.]. Not Encrinuroides c.f. rarus sensu Ludvigsen 1979 p. 21, figs. 42–48 [= W. rolfi n. sp.]. Not Encrinuroides rarus sensu Tremblay & Westrop fig. 17.27–17.36 [= W. tremblayi n. sp.; see Lésperence and Desbiens 1995, p. 9].]. Its type specimen is UC 12322, a cephalon/head (cranidium), and it is a 3D body fossil. It is the type species of Walencrinuroides.

It was recombined as Encrinuroides rarus by Chatterton and Ludvigsen (1976); it was recombined as Walencrinuroides rarus by Lespérance and Desbiens (1995) and Moss and Westrop (2014).

Synonymy list
YearName and author
1877Ceraurus rarus Walcott p. 68
1877Encrinurus raricostatus Walcott p. 69
1897Encrinurus vannulus Clarke p. 739
1976Encrinuroides rarus Chatterton and Ludvigsen p. 74 figs. Pl. 15, figs. 1-43
1995Walencrinuroides rarus Lespérance and Desbiens p. 9
2014Walencrinuroides rarus Moss and Westrop pp. 1114 - 1115, table 1 fig. 9–11

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EubilateriaAx 1987
phylumArthropodaLatreille 1829
classTrilobitaWalch 1771
orderPhacopidaSalter 1864
familyEncrinuridaeAngelin 1854
subfamilyEncrinurinaeAngelin 1854
speciesrarus(Walcott 1877)

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.

D. K. Moss and S. R. Westrop 2014Glabella does not overhang the anterior cranidial border medially, which expands appreciably abaxially, Glabellar crest strongly flattened. Coarse glabellar tuberculate sculpture restricted to the frontal lobe. Rhynchos of hypostome small, strongly tapered and bluntly pointed anteriorly.