Eucholoeops Ameghino, 1887 (Xenarthra, Tardigrada, Megalonychidae) from the Santa Cruz Formation, Argentine Patagonia: implications for the systematics of Santacrucian sloths
Author
Iuliis, Gerardo De
Author
Pujos, François
Author
Toledo, Nestor
Author
Bargo, Susana
Author
Vizcaíno, Sergio F.
text
Geodiversitas
2014
2014-06-27
36
2
209
255
http://dx.doi.org/10.5252/g2014n2a2
journal article
6400
10.5252/g2014n2a2
8c6824d6-3cdc-404b-a2aa-35080929454b
1638-9395
4538397
TABLE 1. — Skull and upper tooth measurements of Eucholoeops ingens Ameghino, 1887 (measurements in mm). Abbreviations: dentition: C1, transverse/mesiodistal diameters of caniniform (or its alveolus); M1-M4, transverse/mesiodistal diameters of molariform teeth or their alveoli; L C1-OC, length from the mesial margin of C1 (or anterior margin of its alveolus) to the posterior margin of the occipital condyles; L C1-M4, length from the mesial margin C1 to the distal margin M4 (or the anterior and posterior margins, respectively, of their alveoli); L Dias, diastema length; L M1-M4, length from the mesial margin of M1 to the distal mar- gin of M4 (or anterior and posterior margins, respectively, of their alveoli); W Pal C1, palatal width between C1s (or their alveoli); W Dias, maximum width across maxillae at level of diastemata; W Mast, skull width across mastoid processes; W C1, maximum width across maxillae at level of C1s; W M3, maximum width between lateral borders of M3 alveoli; W Pal, minimum palatal width at M- (see Table); W Preorbit, dorsal width at preorbital constriction; W Postorbit, width at postorbital constriction; W Temp, width between temporal lines on frontals; c., estimated measurement; *, measurements from Ameghino (1887); specimen not formally assigned to E. ingens, see text.| Catalogue | MPM-PV 3401 | | | | |
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| number | (neotype) | MPM 3451 | MPM-PV 3452 | MPM-PV 15046 | FMNH P13125 |
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| Dentition |
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| C1 | – | 10.2/ 11.7 | – | – | – |
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| M1 | 11.9/6.7 | 11.1/7.2 | – | – | 11.6/8.2 |
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| M2 | 13.2/7.4 | 13.3/7.3 | – | – | 13.1/8.3 |
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| M3 | 11.4/7.5 | 12.3/6.8 | – | – | 11.5/7.9 |
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| M4 | 8.6/5.7 | 9.2/4.2 | 8.4/4.8 | – | 8.5/6.6 |
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| L C1-OC | 165.3 | 159.9 | 145.5 | 147.5 | – |
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| L C1-M4 | 65.2 | 63.7 | 60.9 | 59.3 | 64.9 |
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| L Dias | 21.2 | 20.9 | 17.3 | 18.6 | 19.0 |
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| L M1-M4 | 34.4 | 32.8 | 33.4 | 30.9 | 37.5 |
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| W C1 | c. 52 (26 × 2) | 51.0 | 48.4 | 45.7 | – |
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| W Dias | 35.5 | 30.6 | 31.9 | 28.3 | 29.6 |
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| W Mast | – | 62.8 | 66.3 | – | – |
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| W M3 | 39.8 | 40.4 | 37.0 | 32.3 | – |
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| W Pal | 13.4 at M4 | 13.9 at M3 | 13.2 at M4 | 10.9 at M2 | – |
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| W Pal C1 | 29.0 | 27.9 | 29 | 22.4 | – |
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| W Postorbit | c. 46 (23 × 2) | 41.6 | 41.2 | – | – |
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| W Preorbit | – | 46.2 | 43.2 | 50.0 | – |
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| W Temp | – | 52.8 | – | – | – |
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