Pseudospira, Reitlinger

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

Genus PSEUDOSPIRA Reitlinger in Vdovenko, Rauzer-Chernousova. Reitlinger and Sabirov, 1993 nom. translat. herein

Type Species. Glomospira mikhailovi Reitlinger, 1950 .

Description. Test attached, tubular, bilocular, undivided, with a coiling initially glomospiral and then elongated on the substrate, and serpentiform or oscillating. Wall porcelaneous mixed with a calcareous agglutinate.

Remarks. Some extant and fossil Miliolata exhibit a porcelaneous wall mixed with a siliceous agglutinate ( Agglutinella El-Nakhal, 1983 and other Siphonapertinae Saidova, 1975; see Loeblich and Tappan, 1987; Tappan and Loeblich, 1988). Based on this microstructural similarity, Pseudospira is interpreted here as a Miliolata.

Pseudospira was introduced as a subgenus of Pseudolituotuba Vdovenko, 1971 ; however, the former has a porcelaneous agglutinated wall, whereas the latter has a microgranular agglutinated wall; consequently, they belong to two different classes, Miliolata and Fusulinata, respectively.

Pseudospira differs from Hemigordiellina by the attached habitat, terminal uncoiling and wall microstructure. From the other calcivertellids (and especially Palaeonubecularia ), it differs in its agglutinated porcelaneous wall. From Tolypammina Rhumbler, 1895 , it differs in a calcareous and not siliceous agglutinate; however, like the type species, many false Palaeozoic “ Tolypammina ” might belong to Palaeonubecularia , Pseudospira, Quasilituotuba Brazhnikova in Aizenverg et al., 1983, or Baryshnikovia Reitlinger in Vdovenko et al., 1993.

Occurrence. Middle Pennsylvanian-Early Permian, Donbass, Uzbekistan, New Mexico.