NAME Biporipsilonites bellulus
AGE Eocene-Oligocene.   AGE span: 55.8...23.03 mya
K&J CLASSIFICATION (2000) Fungi Imperfecti, Amerosporae.
FIGURE(S)
Image of
Pl.5fig.39.jpg
FIGURE 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, Development 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.
SPECIES, AUTHORITY B. bellulus (Ke & Shi) ex Kalgutkar & Jansonius 2000.
LOCATION Panshan, Liaoning Province; Laoshanggulin and Beidagang, Tianjin Municipality, Coastal region of Bohai, China.
ORIG DESCRIPTION* Spores 30-35 x 20.5-22.5 µm. Outline somewhat elliptical, ends rather truncate. Diporate. Spore wall fairly thin, about 1.2 µm thick, two-layered, outer layer thicker than the inner one, surface psilate, provided with secondary folds. Outer contour smooth.
COMMENTS*
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, Development 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.
K&J REMARKS The specimens Ke & Shi illustrated as Diporicellaesporites bellulus (nom. nud.) are similar to some species assigned to Psilodiporites Varma & Rawat 1963. Elsik (1981, 1992) combined spores with this morphology in a genus "Psilonites" (nom. nud.; with a type species "P. californicus" Elsik, unpubl.). He classified these spores as diporate and aseptate, and considered the terminal septa as part of the pore chambers. Kalgutkar and Jansonius (2000) propose the new generic name Biporipsilonites for this group of spores.

Because Ke & Shi illustrated two specimens (l.c., pl. 5, fig. 4, 5), but did not designate a type specimen in 1978, the name Diporicellaesporites bellulus was not then validly published. Dr. Song Zhichen (Nanjing) kindly informed Kalgutkar and Jansonius that the specimen they selected as lectotype (l.c., fig. 4) is stored in the Geological Institute of the Dagang Oil Field (e-mail to JJ, 97 12 22); this information allows them to validly publish this name. In 1985, Song proposed a new species D. belluloides (in which he included the specimen illustrated in Ke & Shi, l.c., fig. 5). If these two species are considered to represent a single species, the latter name would have priority.

Kalgutkar and Jansonius (2000) consider the distinct expression of septal folds and/ or split, indicative of the presence of a central perforation, as incidental consequences of differential preservation, which can be observed in several of the species assigned to Biporipsilonites.
TYPE Diporicellaesporites bellulus Ke & Shi 1978, p. 49, pl. 5, fig. 4 (nom. nud.; lectotype, here selected; see Our REMARKS, below).
ALL NAMES (Including synonyms) Diporicellaesporites bellulus Ke & Shi 1978, p. 49, pl. 5, fig. 4.; Biporipsilonites bellulus
SERIAL NUMBER 98
PUBLIC COMMENTS
 *For source, see Publication Reference.