Heterostegina armenica tigrisensis, Less & Özcan & Papazzoni & Stockar, 2008

Less, György, Özcan, Ercan, Papazzoni, Cesare A. & Stockar, Rudolf, 2008, The middle to late Eocene evolution of nummulitid foraminifer Heterostegina in the Western Tethys, Acta Palaeontologica Polonica 53 (2), pp. 317-350 : 334

publication ID	https://doi.org/ 10.4202/app.2008.0211
persistent identifier	https://treatment.plazi.org/id/0399D053-FFA5-4010-FFB7-36C5FD3338BB
treatment provided by	Felipe
scientific name	Heterostegina armenica tigrisensis
status	subsp. nov.

Treatment

Heterostegina armenica tigrisensis View in CoL ssp. nov.

Fig. 11G–I, M.

2007 Heterostegina armenica ( Grigoryan, 1986) View in CoL ; Özcan et al. 2007: pl.

1: 16.

Derivation of the name: Named after the river Tigris flowing close to the type locality .

Holotype: ITU O/KEÇ.11−54 ( Fig. 11H), a megalospheric specimen sectioned along the equatorial plane.

Type locality: Keçili (eastern Anatolia), upper larger foraminiferal horizon, sample Keçili 11.

Type horizon: middle late Bartonian, SBZ 18 B.

Material.—32 well−preserved megalospheric specimens.

Diagnosis.— Heterostegina armenica populations with X mean less than 8.

The equatorial section of A−forms.—The chamberlets are of somewhat irregularly polygonal shape. The secondary septa are occasionally incomplete. For numerical features see Table 5.

Geographic and stratigraphic distribution.—Middle late Bartonian (SBZ 18 B) of Eastern Anatolia, Turkey (the upper larger foraminiferal horizon in Keçili, sample Keçili 11).