Olgaorlovella davydovi, Vachard, Krainer & Lucas, 2015

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 : 50

publication ID

https://doi.org/ 10.26879/433

publication LSID

lsid:zoobank.org:pub:76D74301-4F2F-4A01-ADE5-EF52F8B53659

persistent identifier

https://treatment.plazi.org/id/CA7ABCA4-554E-4057-83E6-60F034611221

taxon LSID

lsid:zoobank.org:act:CA7ABCA4-554E-4057-83E6-60F034611221

treatment provided by

Felipe

scientific name

Olgaorlovella davydovi
status

gen. nov.

Olgaorlovella davydovi View in CoL n. gen. n. sp.

Figures 12.7 View FIGURE 12. 1-8 , 24.1-24.4, 24.7, 24. 10 View FIGURE 24. 1-4, 7, 10 , 35.1-35.5, 35. 8 View FIGURE 35. 1-5, 8 , 36.13 View FIGURE 36. 1-12, 16

zoobank.org/ CA7ABCA4-554E-4057-83E6-60F034611221

? 2008 Pseudoagathammina dublicata (Lipina) ; Filimonova, pl. 2, fig. 19.

? 2010 Pseudoagathammina regularis ; Filimonova, pl. 2, fig. 21.

v. 2013 Orthovertellopsis ; Brose, Lucas and Krainer, fig. 6.12.

v. 2013 b Neodiscus ? sp. 2; Vachard, Krainer and Lucas, p. 348 (no illustration).

Etymology. For Dr. V. Davydov, Boise State University, to honor his knowledge of the International Code of Zoological Nomenclature.

Holotype. NMMNH P67954 About NMMNH ; Figure 24.10 View FIGURE 24. 1-4, 7, 10 ; sample SAR 11-2 About SAR .

Paratypes. NMMNH P-67595-67599; Figure 24.1- 4, 24.6-7 View FIGURE 24. 1-4, 7, 10 .

Material. 45 specimens.

Locus Typicus. NMMNH locality 8903; San Andres Formation reference section in the San Andres Mountains near Rhodes Canyon (New Mexico).

Stratum Typicum. Late? Kungurian (latest Leonardian).

Diagnosis. Ovoid to subspherical test with a coiling transitional from streptospiral to oscillating to planispiral.

Description. Ovoid to subspherical test. Umbilicus absent. Sutures absent. Whorls involute. Lateral sides strongly inflated. Peripheral margin rounded. D = (0.35-0.400)- 0.43-0.58 mm; w = 0.25-0.46 mm; w/D = 0.60-0.87 (0.95); whorls: (rarely 3.5)-4-6; p = (0.06)- 0.08-0.09 mm; h = (0.05-0.06)- 0.07-0.11 mm; s = 0.001 mm.

Comparisons. O. davydovi differs from O. regularis by the more ovoid test, higher lumen and more whorls. A related taxon might be Agathammina sp. sensu Flügel et al. (1984, plate 32, figure 7; plate 34, figures 1, 2, 3). It is similarly morphologically transitional between Glomomidiella and Praeneodiscus and/or Neodiscus , but devoid of a relationship with true Agathammina , as well as late Midian (latest Middle Permian) in age.

Occurrence. Late? Kungurian (latest Leonardian) of New Mexico (San Andres Formation, reference section: samples SAR 8a-27, SAR(2) 11-1, SAR 11-2, SAR 11-3, SAR(2) 11-3, SAR(2) 11-3a, SAR(2) 11-4, SAR(2) 11-5, SAR 11-6, SAR 11-6b, SAR(2) 11-7, SAR(2) 11-8, SAR 11-9, SAR 11-10, SAR 11-11, SAR 11-12, SAR(2) 11-13, SAR(2) 11- 14, SAR(2) 11-15, SAR(2) 11-16, SAR(2) 11-7, SAR 11-18, SAR 11a-2, SAR 11a-3, SAR 11a-7, SAR 11a-8, SAR 11a-11, SAR 11a-14, SAR 11a- 15, SAR 13-4).

NMMNH

New Mexico Museum of Natural History and Science

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