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Walencrinuroides
Taxonomy
Walencrinuroides was named by Lespérance and Desbiens (1995) [Sepkoski's age data: O Cara-u]. Its type is Ceraurus rarus. It was considered monophyletic by Moss and Westrop (2014).
It was assigned to Phacopida by Sepkoski (2002); and to Encrinurinae by Lespérance and Desbiens (1995) and Moss and Westrop (2014).
It was assigned to Phacopida by Sepkoski (2002); and to Encrinurinae by Lespérance and Desbiens (1995) and Moss and Westrop (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1995 | Walencrinuroides Lespérance and Desbiens p. 9 |
| 2002 | Walencrinuroides Sepkoski |
| 2014 | Walencrinuroides Moss and Westrop p. 1114 |
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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.
G. †Walencrinuroides Lespérance and Desbiens 1995
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†Walencrinuroides autochthon Tripp 1962
†Walencrinuroides polypleura Tripp 1967
†Walencrinuroides rarus Walcott 1877
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Invalid names: Encrinurus raricostatus Walcott 1877 [synonym], Encrinurus vannulus Clarke 1897 [synonym]
†Walencrinuroides rolfi Moss and Westrop 2014
†Walencrinuroides tremblayi Moss and Westrop 2014
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. J. Lespérance and D. Desbiens 1995 | Encrinurines with variable width: length glabellae and equally variable outlines of lines joining tips of L2-L3- L4 lobes; glabellae with 50-90 tubercles, tubercle pairs symmetrical across (tr.) LI and L2, and rarely L3 lobes, in some species (lapworthi, rarus, and gelaisi n. sp.), without symmetry in the others; short anterior cranidial borders in dorsal view, with omnipresent tubercles; with short genal spines (except lapworthi) and hypostomata with elongated middle bodies (except rarus); pygidia with subequal width-length ratios, 17-21 axial rings, 7-9 pleural ribs, and 1-2.5 congruent pleural ribs and axial rings. | |
| D. K. Moss and S. R. Westrop 2014 | Strongly expanded, “mushroom-shaped“ glabella (character 1, state 1), strongly perforated, small tubercles in the 1L-1, 2L-1, and 3L-1 positions (character 9, state 2), and a relatively narrow pygidium whose length is greater than 90% of maximum width (character 23, state 2). |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Aberhan et al. 2004, Hendy 2009 | |||||
Age range: base of the Sandbian to the top of the Aurelucian or 458.40000 to 456.60000 Ma
Collections (20 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chazyan | Canada (Northwest Territories) | Encrinuroides rarus (24621 25932 25933 25935 26057) | |
| Whiterockian | Canada (Northwest Territories) | Encrinuroides rarus (25172) | |
| Chazyan - Caradoc | Canada (Northwest Territories) | Encrinuroides rarus (25308 25309 25310) | |
| Llandeilo - Aurelucian | United Kingdom (Scotland) | Encrinuroides polypleura (182194 182195 182196) | |
| Sandbian | Canada (Northwest Territories) | Encrinuroides rarus (192905) | |
| Blackriveran | Canada (Northwest Territories) | Encrinuroides rarus (24628 24631) | |
| Blackriveran | USA (Iowa/Wisconsin) | Encrinuroides rarus (23118 23119 23120 23121) | |
| Blackriveran - Rocklandian | Canada (Northwest Territories) | Encrinuroides rarus (24634) |