Taxonomy Online - Carboniferous spores part I - Species details


Species name
Bellispores nitidus (Horst) Sullivan, 1964

Description
Radial, trilete, acamerate, cingulate miospores. Amb triangular with concave or more rarely straight sides and rounded apices. Outline crenulate. Trilete mark distinct, sutures straight, simple or with low narrow thickened labra, extending to the inner margin of the cingulum. Intexine thin, forming wall of spore body. Exoexine closely adpressed over both proximal and distal surfaces but extended in the equatorial plane to form irregular narrow cingulum, 2–5 µm wide, with irregular crenulate margin but of more or less uniform thickness. Distal surface ornamented with thickened Y-shaped structure with the three components extending from the distal pole to the cingulum which they join in the radial positions. Margins of distal thickened ribs crenulate in the same style as the cingulum, individual ribs up to 10 µm wide. Proximal surface laevigate, distal surface including distal thickened ribs and the cingulum foveolate, with foveolae less than 2 µm in diameter. Foveolae may be randomly distributed or arranged in rows. Distal thickened ribs often bear two rows of foveolae running down their length.

Other descriptions
Horst, 1955, p. 181, p1. 24, fig. 81. Artüz, 1957, p. 255, pl. 7, fig. 49. Sullivan, 1964, p. 375

Size
Overall equatorial diameter 27(36)45 μm

Remarks
Smith and Butterworth (1967) suggested that Bellispores bellis Artüz 1957 and Simozonotriletes trilinearis Artüz 1957 are synonymous with Bellispores nitidus.

Range
Mississippian to Pennsylvanian; late Visean [Brigantian] to Bashkirian [early Duckmantian]; VF to NJ biozones (Clayton et al., 1977; Owens et al. 2004)

Images

MPK 7762 MPK 7762 Figure 3a
Passage Group, Saltgreen Borehole, West Lothian, Scotland; [?Kinderscoutian–Marsdenian], KV–FR Biozones, Sample MPA 30051, Specimen MPK 7762. Oblique compression with distal focus showing well defined Y-shaped crenulate thickening on distal surface. Specimen maximum dimension 43 μm.


MPK 7763 MPK 7763 Figure 3b
Passage Group, Saltgreen Borehole, West Lothian, Scotland; [?Kinderscoutian–Marsdenian], KV–FR Biozones, Sample MPA 30051, Specimen MPK 7763. Specimen maximum dimension 43 μm.