II.—On the Structure of Calymmatotheca kidstoni Calder (emended) and Genomosperma latens gen. et sp. nov. from the Calciferous Sandstone Series of Berwickshire

Cambridge University Press (CUP) - Tập 64 Số 2 - Trang 29-44 - 1960
A. R. Long1
1Berwickshire High School, Duns

Tóm tắt

SynopsisThe Lower Carboniferous fossil Calymmatotheca kidstoni Calder is shown to be a simple seed and is redescribed under the new name Genomosperma kidstoni. A second species G. latens is also described. Genomosperma gen. nov. is of interest in possessing a free nucellus with a lagenostome and short salpinx. The nucellus is surrounded by an integument of about eight lobes which are free from one another and from the nucellus from near the base of the seed. The vascular details of t h e seeds have been studied and in each species pollen has been observed in the pollen chamber.Genomosperma is compared with various Pteridosperm seeds.

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Tài liệu tham khảo

Kidston, 1901, Notes on Carboniferous Plants from Berwickshire, Summ. Progr. Geol. Surv. Lond., 1900, 174

Jongmans, 1930, On the fructification of Sphenopteris hœninghausi and its Relations with Lyginodendron oldhamium and Crossotheca schatzlarensis, Jversl. Geol. Bur. Heerlen, 1929, 77

10.1017/S0080456800024881

10.1098/rstb.1905.0008

10.1093/oxfordjournals.aob.a083546

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10.1017/S0080456800023061

Stue, 1877, Die Culm-Flora

10.1017/S0080456800003100

Kidston, 1902, Report on Fossil Plants from the Calciferous Sandstones of the Berwickshire Border, Summ. Progr. Geol. Surv. Lond., 1901, 179

10.1017/S0080456800009108

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Cambridge University Press (CUP)

Tập 64 Số 2

29-44

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