Pachytestopsis tayloriorum

Name

Pachytestopsis tayloriorum

Rank

Species

Generic Name

[Genus] Pachytestopsis

Authors (Pub.)

McLoughlin S. Bomfleur B. Drinnan A. N.  

Publication

Pachytestopsis tayloriorum gen. et sp. nov., an anatomically preserved Glossopterid seed from the Lopingian of Queensland, Australia [2018/7]

Authors (Book)

Krings M. Harper C. J. Cúneo N. R. Rothwell G. W.  

Book

Transformative Paleobotany

Page number

157

Year

2018

Fossil Status

seeds

Stratigraphy

Changhsingian

Strat. comment

Fort Cooper Coal Measures (Blackwater Group)

Location

Small, roadside outcrop (HV6) near the central eastern boundary of the Hail Creek Coalfield, situated c. 10 km WSW of Homevale and c. 35 km NW of Nebo, Queensland, Australia

Paleoregion

Gondwana (Australia)

Data for Holotypus

Repository

Naturhistoriska riksmuseet, Stockholm, Sweden

Repository Number

NRMS089801-01-01

Num

1: 1

Pub.

Pachytestopsis tayloriorum gen. et sp. nov., an anatomically preserved Glossopterid seed from the Lopingian of Queensland, Australia [2018/7]

Diagnosis

Seed coat consisting of lignified exotesta with epidermis and hypodermis c. 2e3 cell layers thick composed of thickened prismatic cells; mesotesta of longitudinally arranged cells differentiated into narrow outer layer of thin-walled cells and inner layer of sclereids; and parenchymatous endotesta. Exotesta forming a pair of thin lateral wings in primary plane, of more-or-less even width from base to micropyle, containing a narrow core of outer mesotestal parenchyma. Inner mesotesta up to 600 mm thick with an outer boundary of irregular projections or ridges. Vasculature consisting of a terete strand entering straight through the chalaza and bifurcating and abruptly terminating in a discoidal to cup-shaped nucellar pad; testa is otherwise unvascularized. Basal nucellar pad up to 230 mm thick, tapering distally into cutinized nucellar wall with straight longitudinal anticlinal cell walls and oblique end walls. Megaspore membrane <10 mm thick.