Pterospermella Eisenack, 1972

Atfy, Haytham El, Abeed, Qusay & Uhl, Dieter, 2023, Non-pollen palynomorph and palynofacies assemblages from the Lower Cretaceous of Iraq: A glimpse into palaeobiology and palaeoenvironment, Geodiversitas 45 (11), pp. 353-366 : 357

Pterospermella Eisenack, 1972 .

A single Pterospermella sp. was found in sample 09-262. It is characterized by a spherical to ovoidal central body surrounded by a flat, membranous equatorial wing lamella, with a maximum diameter of 30 µm. However, this specimen lacked sufficient characters for robust species-level identification ( Fig. 3H ).

Figures

FIG. 3. — The palynological assemblage of the Yamama Formation: A, colony of degraded Botryococcus Kützing, 1849 seen in transmitted white light. Note characteristic globular outline and lustrous yellow colour;09-262-2_P47;B, isolated coenobium of degraded Botryococcus colony seen in transmitted white light; 09-234-1_P35; C, colony of Botryococcus fluorescing under incident blue light illumination, the globular outline of the cells is very clear however, the cell cups are not clearly visible; 09-234_P35; D, Palambages sp., 09-242-3_P36; E, Palambages sp., 09-262-2_W40, arrow refers to loophole (= Schlüpfloch of Gocht & Wille 1972); F, Palambages sp., 09-262-3_G36, arrow refers to loophole (= Schlüpfloch of Gocht & Wille 1972); G, Palambages sp., 09-262-3_G40, arrows refer to loophole (= Schlüpfloch of Gocht & Wille 1972); H, marine prasinophyte phycoma of the genus Pterospermella Eisenack, 1972, 09-262-1_H53; I, dinocyst Batioladinium micropodum (Eisenack & Cookson, 1960) Brideaux, 1975, 09-234-1_R56; J, dinocyst, 09-234-1_M50; K, dinocyst, Cribroperidinium sp., 09-234- 1_N53; L, Leiosphaeridia sp., 09-255-3_G53; M, Leiosphaeridia sp., 09-262-3_T37; N, Leiosphaeridia sp., 09-234-3_S51; O, Leiosphaeridia sp., 09-255, arrow points to a possible encystment opening. Scale bars: 20 μm.