NAME Ampulliferinites axelheibergii
AGE Late Eocene or Early Oligocene.   AGE span: 37.2...28.4 mya
K&J CLASSIFICATION (2000) Fungi Imperfecti, Didymosporae.
FIGURE(S)
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Pl.10fig.8.jpg
FIGURE REFERENCE Kalgutkar RM, Sigler L. 1995. Some fossil fungal form-taxa from the Maastrichtian and Palaeogene ages; Mycological Research, v. 99, p. 513-522.
SPECIES, AUTHORITY A. axelheibergii Kalgutkar & Sigler 1995, p. 517, fig. 4.
LOCATION Amphitheatre Formation, Axel Heiberg Island, Yukon Territory.
ORIG DESCRIPTION* Chains comprising 5-8 conidia, straight and unbranched and slightly constricted at the thick separating septa. Filamentous chains 79-240 µm long. Didymosporous conidia occurring in arthroconidial chains separated by thick, dark brown septa which alternate with thin septa along the length of the filament. Filaments short to long, determinate; subtended by a basal cell. Basal cell pale brown, aseptate, tapering towards the base, with an attachment scar left after the detachment of the filament from the mycelium. Conidia two-celled, not or slightly constricted at septum, smooth, brown, truncate at both thickened ends, 16-22 x 7-11 µm. Detached conidia were not found.
COMMENTS* Ampulliferinites axelheibergii resembles Alternoseptites elongatus Rouse (1962) in having filaments indented at every second septum, but in A. elongatus the septa are not thickened and the filaments are not arthroconidial in nature. Named after its type locality on Axel Heiberg Island.
PUBLICATION REFERENCE Kalgutkar RM, Sigler L. 1995. Some fossil fungal form-taxa from the Maastrichtian and Palaeogene ages; Mycological Research, v. 99, p. 513-522.
K&J REMARKS Kalgutkar & Sigler (1995) erred in the citation of "Alternoseptites elongatus" (see above under "Authors" comments"). The name "Alternoseptites" was first used in print by Rouse (1962), as a nomen nudum in a table, without further explanation or illustration. Rouse (1962) in his paper included material from the unpublished M.Sc. thesis by L.V. Hills, in which an unnamed specimen of this morphology was illustrated. Elsik, in his unpublished 1992 Short Course material, included a manuscript name "Alternosporites elongatus," which he illustrated with a line drawing after Hills" photograph. The type locality of the species is on Axel Heiberg Island; the species is named for this Arctic explorer.
TYPE
ALL NAMES (Including synonyms) Ampulliferinites axelheibergii
SERIAL NUMBER 17
PUBLIC COMMENTS
 *For source, see Publication Reference.