Sermaya biseriata

Name

Sermaya biseriata

Rank

Species

Generic Name

[Genus] Sermaya

Authors (Pub.)

Eggert D. A. Delevoryas T.  

Publication

Studies of Paleozoic ferns: Sermaya, gen. nov. and its bearing on filicalean evolution in the Paleozoic [1967/6]

Journal

Palaeontographica

Volume

120

Issue

5–6

Page number

172

Year

1967

Fossil Status

foliage (fertile)

Stratigraphy

Kasimovian

Strat. comment

Calhoun Coal, Mattoon Formation, McLeansboro Group

Location

Sec. 7, T2N, RI3W, Sumner Quadrangle, Creek bed near town of Berryville, Lawrence County, Illinois, USA

Paleoregion

Laurussia (Laurentia)

Data for Holotypus

Repository

Yale Peabody Museum of Natural History, New Haven, USA

Repository Number

Specimen contained in University of Iowa Coal Ball 100

Num

Plate 34, Fig. 1; Plate 35, Fig. 2—9; Plate 36, Fig. 10—14; Plate 37, Fig. 15—21; Plate 38, Fig. 22—26.

Pub.

Studies of Paleozoic ferns: Sermaya, gen. nov. and its bearing on filicalean evolution in the Paleozoic [1967/6]

Diagnosis

Sporangia approximately 0.33 to 0.35 mm. in diameter producing spores ranging from 30 to 40 microns in diameter when mature. Mature spores having arms of the trilete extending from the point of divergence almost to full diameter of the spore body with the outer surface of the spore wall smooth to finely punctate. Distal portion of frond pinnatifid having alternately borne, shallowly lobed pinnules measuring about 4.4 mm. in length and 2.6 mm. in diameter.