Sonapteris pilsensis

Name

Sonapteris pilsensis

Rank

Species

Generic Name

[Genus] Sonapteris

Authors (Pub.)

Pšenička J. Bek J. Rössler R.  

Publication

Two new species of Sonapteris gen. nov. (Botryopteridaceae) based on compressions from the Upper Carboniferous (Bolsovian-Westphalian D) of the Pilsen Basin, Bohemian Massif [2005/10]

Journal

Review of Palaeobotany and Palynology

Volume

136

Issue

3–4

Page number

124

Year

2005

Fossil Status

foliage (fertile)

Stratigraphy

Moscovian

Strat. comment

Westphalian D, Kladno Formation, Nýřany Member

Location

Nýřany, Pilsen Basin, Plzeň-North District in the Plzeň Region, Czech Republic

Paleoregion

Laurussia (Perunica)

Data for Holotypus

Repository

Západočeské muzeum, Plzeň, Czech Republic

Repository Number

F 03699

Num

Plates VII-X

Pub.

Two new species of Sonapteris gen. nov. (Botryopteridaceae) based on compressions from the Upper Carboniferous (Bolsovian-Westphalian D) of the Pilsen Basin, Bohemian Massif [2005/10]

Diagnosis

Primary rachis 4 mm wide, with longitudinal striations and punctae. Two longitudinal striations are prominent. Secondary pinna rachises 2 mm wide, with longitudinal striations and punctate. Central rachis of sporangial mass 1 mm wide. Ultimate rachises 0.5–0.2 mm wide. Large pinnule-like organs (? baphlebiaQ) borne at the site of a attachment of secondary pinna rachis to main rachis, more than 35 mm long, 15 mm wide, showing elongated lobes with weak midvein and open venation. More than 2200 sporangia tightly packed in globose-ovate fertile organs. Fertile organs probably pinnate, alternate on secondary pinna rachis, 10–15 mm in diameter. Sporangia or clusters of sporangia extend terminally from ultimate rachises. Number of sporangia per cluster 2–7. The sporangia are ovoid, elongated, 580 (720) 877 um long and 282 (388) 519A um wide. The multicellular lateral annulus is biseriate, and vertically elongated near the base. The ordinary thin-walled cells of sporangium wall are polygonal, sometimes elongated. The cells of the epidermis of the ultimate rachis are tetragonal, elongated, with straight anticlinal wall, but without hair bases. Circular, triangular to oval trilete spores 20 (40.4) 58 um in diameter. Rays of the trilete extend for one-half to two-thirds of the radius. Laevigate, scabrate, microgranulate, granulate, microverrucate, verrucate, baculate, spinate, and clavate exine 1–2 um thick. Sculpture elements up to 5 um high, 3 um wide.