Tenchovia Pšenička et Bek

Plant Fossil Names Registry Number: PFN000319

Act LSID: urn:lsid:plantfossilnames.org:act:319

Authors: J. Pšenička & J. Bek

Rank: genus

Reference: Pšenička, J. & Bek, J. (2004): Techovia bulgarensis gen. et sp. nov. from the Pennsylvanian of the Dobrudzha Coalfield, Bulgaria. – Geologica Balcanica 34(1–2): 69–76., link

Page of description: 72

Type

Original diagnosis/description

Frond more than bipinate. Pinnules of the sphenopteroid type. Sporangia clustered in sori at apex of pinnule lobes, no pattern of position. Sori without indusium located on lateral veins ending, attached to a circular receptacle, and contain 4-6 laterally annulate sporangia. Annulus situated near the base of the sporangium, includes ½-⅔ of the whole meridional circumference of the sporangium, consists of three rows of thick-walled cells. Sporangium interrupted by a stomium consisting of elongate cells, going from the base, across the apex, and ending near of the annulus; the stomium is placed on the opposite side of sporangium from the annulus. Trilete spores triangular, subcircular to circular. Laesurae one-third to a half of the radius. Exine finely microgranulate; folding frequent.

Etymology

In honour of Prof. Y anaki Tenchov, D.Sc. from the Geological Institute 'Strashimir Dimitrov', Bulgarian Academy of Sciences, a famous palaeobotanist and friend.