Olgaorlovella, 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 : 48-50

Genus OLGAORLOVELLA n. gen.

zoobank.org/ 53210326-7BDC-4903-9232-C36ECA757A6D

Etymology. Dedicated to Dr Olga Orlov-Labkovsky, Tel-Aviv University, for her contributions to Carboniferous and Permian biostratigraphy.

Synonyms. Pseudoagathammina (part.); Glomospira (part.).

Type Species. Olgaorlovella davydovi , n. gen. n. sp.

Diagnosis. Rounded to ovoid test, moderately large in diameter, with relatively numerous volutions. No pseudosepta. Proloculus spherical with flexostyle canal. Wall particularly thin and often recrystallized (light gray to whitish color).

Composition. Olgaorlovella davydovi n. gen. n. sp.; Glomospira regularis Lipina, 1949 (sensu stricto); G.regularis sensu Wang, 1982 (plate 4, figure 24; another species); G. regularis sensu Vachard and Krainer, 2001b (plate 4, figures 16, 17, 19 (only); a third different species); Pseudoagathammina regularis sensu Filimonova, 2008 (plate 2, figure 21; a fourth species); G. dublicata Lipina, 1949 non Reitlinger, 1950; non Filimonova, 2008 =? O. davydovi , see below; nec 2010 = another species; G. dublicata turajevica Baryshnikov in Baryshnikov et al., 1982; G. tenuifistula sensu Lin et al., 1990 (plate 2, figures 1, 2, 3); Pseudoagathammina orbicularia Lin, Li and Sun, 1990 (plate 27, figures 2, 3, 4, 5?, 6?); P. retroseptata sensu Filimonova, 2008 (plate 2, figure 23) and 2010 (plate 2, figure 10); Streblospira australae sensu Mamet (1996, plate 1, figure 35).

Remarks. Olgaorlovella n. gen. differs from the Permian (and Triassic?) “ Glomospira ” and Pseudospira by the type of wall, larger size, the proportionally very thin wall that is often recrystallized, and the flexostyle canal of the proloculus. Olgaorlovella n. gen. differs from Pseudoagathammina sensu stricto by the more regular coiling and the absence of agathamminid stage; nevertheless, some Pseudoagathammina described by Lin et al. (1990) and Filimonova (2010) probably correspond to our new genus.

The flexostyle canal of the proloculus of Olgaorlovella davydovi n. gen. n. sp. is conspicuous in Figure 24.3 . Similarly, the holotype of Olgaorlovella regularis (Lipina) n. comb. and a specimen of Vachard and Krainer (2001b, plate 14, figure 17) show a flexostyle canal.

Occurrence. Early Permian of Bashkorotostan ( Russia), South China and the Carnic Alps. Artinskian of South America (Yaurichambi, Bolivia). Late? Kungurian (latest Leonardian) of New Mexico. Bolorian (late Kungurian) of Darvaz ( Tajikistan) and Armenia. Lazarus effect or parallel evolution with the group Glomospira tenuifistula Ho, 1959 during the Triassic.

Figures

FIGURE 24. 1-4, 7, 10. Olgaorlovella davydovi n. gen. n. sp. 1. NMMNH P-67595, paratype. Axial section. San Andres Fm. Sample SAR 11-15. 2. NMMNH P-67596, paratype. Axial section. San Andres Fm. Sample SAR 11a-7. 3. NMMNH P-67597, paratype. Axial section. San Andres Fm. Sample SAR 11-8. 4. NMMNH P-67598, paratype. Axial section. San Andres Fm. Sample SAR 11-12. 7. NMMNH P-67599, paratype. Subaxial section. San Andres Fm. Sample SAR 11-6b. 10. NMMNH P-67594, holotype. Axial section. San Andres Fm. Sample SAR 11-2. 5-6, 9, 11. Orthovertellopsis calcitornellaeformis n. gen. n. sp. 5. NMMNH P-67575, paratype. Oblique section showing the costae. San Andres Fm. Sample SAR 12-8. 6. NMMNH P-67574, holotype. Transverse section with Olgaorlovella davydovi n. gen. n. sp. San Andres Fm. Sample SAR 11-10. 9. NMMNH P-67592, paratype. Oblique section. San Andres Fm. Sample SAR 11a-13. 11. NMMNH P-67593, paratype. Subaxial section. San Andres Fm. Sample SAR 11-7a. 8, 12. Tubiphytes epimonellaeformis n. sp. 8. Subaxial section. San Andres Fm. Sample SAR 12-1. 12. Subaxial section difficult to distinguish from T. obscurus Maslov, 1956. San Andres Fm. Sample SAR 3-3. Scale bars equal 0.10 mm.