NAME Trichopeltina exporrecta
AGE Early Eocene.   AGE span: 55.8...40.4 mya
K&J CLASSIFICATION (2000) Ascomycetes, Microthtriales.
FIGURE(S)
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FIGURE REFERENCE Dilcher DL. 1965. Epiphyllous fungi from Eocene deposits in Western Tennessee, U.S.A.; Palaeontographica, Abt. B, v. 116, p. 1-54.
SPECIES, AUTHORITY T. exporrecta Dilcher 1965, p. 23, pl. 13, fig. 100.
LOCATION Western Tennessee, USA.
ORIG DESCRIPTION* Stroma small, sterile, associated with conspicuous free hyphae. Stroma 30-75 x 42-140 µm, consists of rectangular to elongate cells 1.5-4 x 3.5-10 µm, united laterally, dichotomizing marginally, or a sheet of randomly orientated irregularly shaped cells 2-4 x 3-8 µm. Stroma margins entire to lobed. Setae sometimes present, 2 µm tapering to 1.5 x 25 µm. Free hyphae attached to stromata, more or less sinuous, anastomose freely over the upper and lower surfaces of the host leaf. Hyphal cells 1.5-4 x 5-30 µm. Two-celled (1-septate) germinating spores attached to free hyphae. Spores 3.5-5 x 12-17 µm, germinate terminally or laterally. Host leaf Sapindus sp.
COMMENTS* Only linear and radiate sterile stromata, free hyphae, and germinating spores are known for this fossil form. It unquestionably belongs in the Trichopelteae because its stroma consists of a radiate prosenchymatous membrane. This fossil material was placed in the genus Trichopeltina (Clements & Shear, 1931) on the basis of the 2-celled (1-septate) hyaline germinating spores which were found still attached to the free hyphae produced (pl. 13, figs. 101, 102). This form does not appear to develop from a germinating stage as does Trichopeltinites fusilis, but the stromata develop, by proliferation of the free hyphae, into a prosenchymatous membrane. No fertile areas were found in the young stromata observed. No direct evidence of parasitism upon the host leaves of Sapindus sp. was found.
PUBLICATION REFERENCE Dilcher DL. 1965. Epiphyllous fungi from Eocene deposits in Western Tennessee, U.S.A.; Palaeontographica, Abt. B, v. 116, p. 1-54.
K&J REMARKS Although Dilcher did not designate a holotype, but syntypes (all resulting from a single collection), Kalgutkar and Jansonius (2000) consider that the name was validly published, in accordance with ICBN Art. 8.1, which states that: "for small herbaceous plants and most non-vascular plants, the type may consist of more than one individual ... conserved permanently on one ... microscope slide, or in one equivalent preparation, e.g. a box ...." Fossil plants are not excepted from this tolerant Rule.

Kalgutkar and Jansonius (2000) select a lectotype from these syntypes; it is permanently preserved in the paleobotanical collections of the Peabody Natural History Museum, Yale University, New Haven, Connecticut, USA.
TYPE T. exporrecta Dilcher 1965, p. 23, pl. 13, fig. 100 [lectotype: fruiting body, selected by Kalgutkar & Jansonius (2000) from illustrated syntypes].
ALL NAMES (Including synonyms) Trichopeltina exporrecta
SERIAL NUMBER 1721
PUBLIC COMMENTS
 *For source, see Publication Reference.