Cribrospira Moeller. Akademiya Nauk SSSR, Trudy 1878
Creators: name: Liu, Chao
name: Vachard, Daniel
name: Cózar, Pedro
name: Coronado, Ismael
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Chromista
Foraminifera
Fusulinata
Endothyrida
Janischewskinidae
Cribrospira

description: Genus Cribrospira Möller, 1878
Type Species. Cribrospira panderi Möller, 1878.
Diagnosis. Globose Janischewskinidae with a marked small skew-coiled juvenarium, low number of chambers, and short septa, curved backward, with swollen extremes or straight pointed. Wall granular in the primitive species, becoming microgranular to porous in more advanced forms. Cribrate aperture in the final chamber.
Composition. Cribrospira auriculata (Lin, 1981), C. baliamadeni Pille, Vachard and Argyriadis in Pille et al., 2010; C. denticulata Strank, 1983; C. evoluta sp. nov.; C. knetschi Omara and Conil, 1966; C. lebedevae Vachard and Cózar in Vachard et al., 2016 (= Janischewskina ladeinaensis Stepanova and Gibshman, 2017 = Janischewskina compressa Grozdilova and Lebedeva in Grozdilova et al., 1978), C. lianxianensis Lin, 1981; C. micula Vdovenko, 1982; C. mikhailovi Rauser-Chernousova, 1948c; C. mira Rauser-Chernousova, 1948c; C. orbiculata (Ganelina, 1956); C. panderi Möller, 1878; C. pansa Conil and Lys, 1965; C. paradenticulata sp. nov.; C. rara Rauser-Chernousova, 1948c.
Remarks. As mentioned previously, the most primitive species of the genus show a more granular wall with some agglutinated grains, and thus, they could be considered by some scholars as Rhodesinella, such as C. denticulata, C. knetschi, C. micula, C. pansa, C. paradenticulata, and C. rara. In contrast, more evolved species of the genus show a typical microgranular to porous wall (e.g., C. panderi, C. baliamadeni, and C. orbiculata).
Occurrence. Middle Viséan to late Serpukhovian in the Russian Platform, Urals, Belgium, Spain, England, Morocco, Ireland, Poland, Southern France and Ukraine. The genus has been also described in the same interval in Turkey, “Central Asia”, China, Laos, Viet-Nam, and Japan (Hance et al., 2011). Although as mentioned above, the First Occurrence Datum of the genus is usually in the middle Viséan or its equivalents, the First Appearance Datum (FAD) of the most primitive species of the genus, considered as Rhodesinella auct., is in the uppermost lower Viséan in Europe, upper Moliniacian in Belgium (Laloux, 1987), and upper Arundian in Britain (Figure 4D‒E; see also Fewtrell et al., 1981).
Distribution in the Bama Platform. The genus is rare below the Mikhailovian, and only Cribrospira paradenticulata has been recorded in the Bama Platform in strata equivalent to the Tulian, and Cribrospira mira (Figure 6B) from the upper part of the Aleksinian. The base of the Mikhailovian is marked by the first C. panderi (together with Eostaffella ikensis Vissarionova, 1948) (Figure 6C). These species are present in the entire Mikhailovian in the Shuidong section and only at the top of this substage C. orbiculata and C. mikhailovi first occur (Figure 6A, E). In the Kacai section, C. mikhailovi is also first recorded from the base of this substage.
More diversified species are recorded from the Venevian, including C. evoluta, C. baliamadeni, and C. lianxianensis (Figure 6D, F). However, this increase in the diversity does not coincide with an increase in its abundance, which is mostly concentrated in levels assigned to the Serpukhovian.
description: Published as part of Liu, Chao, Vachard, Daniel, Cózar, Pedro & Coronado, Ismael, 2023, New species and evolution of the foraminiferal family Janischewskinidae in the middle-upper Mississippian of South China, pp. 1-27 in Palaeontologia Electronica (a 2) (a 2) 26 (1) on pages 10-11, DOI: 10.26879/1238, http://zenodo.org/record/10962121