NAME Biporisporites
AGE    AGE span:  mya
K&J CLASSIFICATION (2000) Fungi Imperfecti, Amerosporae.
FIGURE(S)
FIGURE REFERENCE
SPECIES, AUTHORITY Biporisporites Ke & Shi 1978, p. 45.
LOCATION
ORIG DESCRIPTION* ORIGINAL DIAGNOSIS: Spores one-celled, spherical. Diporate, pores situated at same end of spore. Spore wall of medium thickness, surface psilate or scabrate.

EMENDED DIAGNOSIS: (Norris, 1997, p. 27): Fungal spore-like bodies, unicellate, equilateral, heteropolar, oblate, circular to oval in shape, one end (defined as apical) with a central boss-like thickening flanked by two pores at its proximal end and prominent lumina in the spore wall laterally adjacent to the constricted median part of the boss. Lateral arm-like thickenings arise from the distal end of the boss. Spore wall smooth, single layered, unornamented or bearing variable ornament in the form of concentric or reticulate thickenings that become subdued in the area immediately surrounding the central boss. Monotypic.
COMMENTS* (Ke & Shi): Spores in this genus are distinguished from those in Diporisporites van der Hammen 1954, emend. Elsik 1968 by the fact that the two pores are situated at the same end of the spore outline. (Norris): Also to be included in this genus is the unnamed species that Ediger & Alisan (1989, p. 141, pl. 3, figs. 1,2) assigned, mistakenly, to Striadiporites cf. sanctaebarbarae. (Its age is probably Oligocene, fide e-mail from Norris to JJ.)
PUBLICATION REFERENCE Ke, Shi. 1978. (pseudonym of Sung, Z.C., Tsao, L., Chou, H.I., Kwang, H.L. & Wang, K.T.) Early Tertiary spores and pollen grains from the coastal region of the Bohai (in Chinese); Academy of Petroleum Exploration, Develapment and Planning Research of the Ministry of Petroleum and Chemical Industries and the Nanjing Institute of Geology, and Paleontology, Chinese Academy of Sciences, Kexue Chubanshe, Peking, 177 p.

Norris G. 1997. Paleocene-Pliocene deltaic to inner shelf palynostratigraphic zonation, depositional environments and paleoclimates in the Imperial ADGO F-28 Well, Beaufort-Mackenzie basin; Geological Survey of Canada, Bulletin 523, 71 p.
K&J REMARKS Ke & Shi saw this spore as diporate (as it were, with the axis curved over almost 180 degrees, resulting in the close spacing of the pores). Norris saw the central (apical) boss as the primary distinguishing characteristic; Kalgutkar and Jansonius (2000) interpret this boss as a secondary thickening of the partition separating the two pore cells that underly each of the two (proximal?) pores.
TYPE TYPE: Biporisporites rotundus Ke & Shi 1978, p. 45, pl. 4, fig. 20.
ALL NAMES (Including synonyms) Biporisporites;
SERIAL NUMBER 107
PUBLIC COMMENTS
 *For source, see Publication Reference.