Fig. 3A–C; Table 1.

1955 Fistulipora petaloida sp. nov; Schulga−Nesterenko 1955: 70–71, pl. 7: 2, text−fig. 3e.

Material.—Two fragments SMF 1737, 1759.

Description.—Encrusting colony, commonly multilayered. Single sheets reaching 0.63 to 1.13 mm in thickness. Autozooecial apertures rounded to oval, spaced 2.5–4.0 in 2 mm on the colony surface in growth direction, separated usually by 1–2 rows of vesicles. Lunaria prominent, 0.21–0.29 mm wide and 0.09–0.21 mm long. Basal diaphragms thin, horizontal or slightly inclined, usually 1–2 in each autozooecium. Vesicles polygonal in cross−section, having rounded roofs in longitudinal section, spaced 9–10 in 1 mm colony thickness. Outer granular skeleton well developed, bearing small abundant styles.

Discussion.—This species is similar to Dybowskiella (?= Fistulipora) lebedevi Nikiforova, 1933 from the Lower Carboniferous of the Donetsk Basin, Ukraine. However, the latter species has distinctly smaller lunaria —0.075 –0.100 versus 0.090 –0.210 mm long and 0.210 –0.290 mm wide in Fistulipora petaloida.

Stratigraphic and geographic range.—Moscow River, Russian Plate; Kasimovian Stage, Upper Carboniferous. Picos de Europa Formation, Moscovian, Upper Carboniferous; La Hermida, Spain.