Ammovertella sp.

Vachard, D, Krainer, K & Lucas, SG, 2015, Late Early Permian (late Leonardian; Kungurian) algae, microproblematica, and smaller foraminifers from the Yeso Group and San Andres Formation (New Mexico; USA), Palaeontologia Electronica (English ed.) 3 (8), pp. 1-77 : 38

Ammovertella sp.

Figure 34.13

? 1984 “ Ammodiscella ” sp.; Flügel, Kochansky-Devidé and Ramovs, pl. 32, fig. 2.

v. 2013b Ammovertella sp. ; Vachard, Krainer and Lucas, p. 348 (no illustration).

Description. Planispiral initial stage followed by an uncoiled tubular last part. D = 0.26 mm; whorls: 4; p = 0.05 mm; h = 0.04 mm; s = 0.01 mm. Proloculus spherical, moderately large, larger than the first whorl, with a short flexostyle channel. No umbilicus. Four whorls. Lateral sides of spire slightly inflated. Peripheral margin rounded. Uncoiling in the form of a tubular chamber in which the diameter is equal to the height of the last planispiral whorl, erect, vertical, tubular, perpendicular with the axis of coiling. No secondary incrustation of lateral walls. Wall porcelaneous, dark transformed in microgranular calcite.

Occurrence. Late? Kungurian (latest Leonardian) of New Mexico (San Andres Fm; sample SAR 13- 9a).

Figures

FIGURE 34. 1-5. Hemigordius aff. saranensis Baryshnikov in Baryshnikov, Zolotova and Kosheleva, 1982. 1. Subaxial section. San Andres Fm. Sample SAR 13-5d. 2. Subaxial section. San Andres Fm. Sample SAR 11-5a. 3. Axial section. San Andres Fm. Sample SAR 20-5. 4. Transverse section. San Andres Fm. Sample SAR 11a-12. 5. Subtransverse section. San Andres Fm. Sample SAR 13-11. 6, 10, 17. Orthovertellopsis calcitornellaeformis n. gen. n. sp. 6. Subtransverse section. San Andres Fm. Sample SAR 19-1. 10. Oblique section. San Andres Fm. Sample MLY 8-6. 17. Transverse section. San Andres Fm. Sample SAR(2) 11-10. 7-8. Palaeonubecularia sp. 7. Subtransverse section. San Andres Fm. Sample MLY 5-19. 8. Subtransverse section encrusting a Boueina? crassundia n. sp. San Andres Fm. Sample MLY(2) 5a-19. 9. Pseudospira aff. ishimbaica (Lipina, 1949). Two random sections. San Andres Fm. Sample MLY 6- 23. 11-12. Hemigordellina cf. elegans (Lipina, 1949). 11. Random section. San Andres Fm. Sample SAR 18-3a. 12. Random section. San Andres Fm. Sample SAR 18-3. 13. Ammovertella sp. Transverse section. San Andres Fm. Sample SAR 13-9a. 14. Praeneodiscus convexus n. gen. n. sp. Subaxial section. San Andres Fm. Sample MLY 5-32. 15, 18. Hemigordiellina? aff. simplex (Harlton, 1928). 15. Random section. San Andres Fm. Sample SAR 18-2. 18. Transverse section. San Andres Fm. Sample MLY(2) 4-2. 16. Hemigordellina aff. elegans (Lipina, 1949). Random section. San Andres Fm. Sample SAR 14. 19. Calcitornella cf. elongata Cushman and Waters, 1928a. Subtransverse section. San Andres Fm. Sample MLY(2) 5a-24. Scale bars 1-6, 10-19 equal 0.10 mm.