PITYOSPORITES 



27 



Zonales-sporites zonatus (Ibrahim) 

 Loose, 1934, Inst. Palaobot. Arb., vol. 4, 

 no. 3, p. 150, pi. 7, fig. 31. 



S pontes triangulatus var. sonatus (Ib- 

 rahim) Wicher, 1934, Inst. Palaobot. Arb., 

 vol. 4, no. 4, pp. 175-176. 

 Triletes triangulatus var.? 



Triletes triangulatus III, Stach and 

 Zerndt, 1931, Gliickauf, Jahrg. 67, no 35, 

 p. 1123, figs. 32, 2,Z. 



Sectio, Triangulati. Age, upper Lower 

 Namurian through Westphalian D. 



90. Triletes tricollinus Zerndt, 1938, Deux- 

 ieme Cong. Stratig. Carbonif. vol. 3, p. 1713, 

 pi. 155, fig. 3. 



Type 44 Zerndt, 1938 (idem). 

 Sectio, Triangulati. Age, Westphalian 

 B, C, and D. 



91. Triletes trilobus (Ibrahim) S. W. and B., 

 comb. nov. 



Sporonites trilobus Ibrahim, 1932, 

 Neues Jahrb., Beilage-Band 67, Abt. B, p. 

 449, pi. 17, fig. 30. 



Valvisi-sporites trilobus (Ibrahim) Ib- 

 rahim, 1933, Sporenformen des Aegirhor- 

 izonts, p. 33, pi. 4, fig. 30. 



Valvisi-sporites trilobus (Ibrahim) Ib- 

 rahim, Loose, 1934, Inst. Palaobot. Arb., 

 vol. 4, no. 3, p. 152, pi. 17, fig. 30. 



Sectio, Auriculati. Age, Upper West- 

 phalian B. 

 Note. — Possibly very closely related to Tri- 

 letes appendiculatus. Wicher (1934) regards 

 it as similar to T. auritus. 



92. Triletes tuberculatus Zerndt, 1930, Acad, 

 polonaise sci. Bull, internat. ser. B, pp. 47-51, 

 pi. 2, figs. 6, 7, pi. 3, figs. 8, 9, pi. 4, figs. 

 10,' 11, pi. 5, figs. 12, 13. 



Triletes XIX Kidston, 1890, Royal Soc. 

 Edinburgh Trans., vol. 36, pi., figs. 9-11. 



Type 16 Zerndt, 1931, Acad, polonaise 

 sci. Bull, internat., ser. A, p. 173. 



Triletes tuberculatus Zerndt, Maslan- 

 klewiczowa, 1931, Acta Soc. Bot. Poloniae, 

 vol. 9, Suppl. pp. 165-168, figs. 40, 41. 



Sectio, Auriculati. Age, Westphalian 

 B, C, Stephanian? 



93. Triletes tuberosus (Ibrahim) S. W. and 

 B., comb. nov. 



Sporonites tuberosus Ibrahim, 1932, 

 Neues Jahrb., Beilage-Band 67, Abt. B, p. 

 449, pi. 16, fig. 27. 



Tuber culati-sporites tuberosus (Ibra- 

 him) Ibrahim, 1933, Sporenformen des 

 Aegirhorizonts, p. 23, pi. 3, fig. 27. 



Tuberculati-sporites tuberosus ( Ibra- 

 him) Ibrahim, Loose, 1934, Inst. Palaobot. 

 Arb., vol. 4, no. 3, p. 147, pi. 7, fig. 37.^ 



Sporites tuberosus (Ibrahim) Wicher, 

 1934, idem, vol. 4, no. 4, pp. 177-178, pi. 8, 

 fig. 22. 



Sectio, AphanoBonati. Age, Upper 

 Westphalian B, Lower Westphalian C. 

 Note. — Probably the same as some of Zerndt's 

 Type 14. 



94. Triletes tylotus Harris, 1935, Meddelelser 

 om Gronland, vol. 112, no. 1, pp. 162-163, 

 fig. 53F-I, pi. 26, figs. 1, 12. 



Age, Liasso-Rhaetic. 



95. Triletes valens (Wicher) S. W. and B., 

 comb. nov. 



Sporites valens Wicher, 1934, Inst. 

 Palaobot. Arb., vol. 4, no. 4, p. 178, pi. 8, 

 fig. 19. 



Sectio, Aphanosonati. Age, Lower 

 Westphalian C. 



Triletes nomen excludende 



1. Apiculati-sporites megaspinosus Ibrahim, 1933, Sporen- 

 formen des Aegirhorizonts, etc., p. 24, pi. 8, fig. 69. 

 Note: This form is not congeneric with the type of 

 Apiculati-sporites {Triletes sextus) and, although it ap- 



Earently is sufficiently characterized and characteristic to 

 e a useful microfossil, no further generic assignment will 

 be attempted. 



Genus Pityosporites Seward, 1914 

 Plate 2, figures 15-15b 



Diagnoses given by Seward are as 

 follows : 



The generic designation Pityosporites is pro- 

 posed for winged spores agreeing in form and 

 size with recent Abietineous genera (1914, p. 

 23). 



.... Spores provided with bladder-like 

 extensions of the exine, agreeing in size and 

 form with those of recent Abietineous genera 

 (1919, p. 398). 



A more adequate definition inferred 

 from the above, and from consideration 

 of the species included here, is as follows : 



Symmetry. — Pollen grains appearing 

 bilateral, due to the presence of bladders 

 placed on opposite sides. The funda- 

 mental symmetry, shown by the body but 

 modified, is radial, as this pollen arises 

 from tetrahedral tetrads. 



Shape — Grains elliptical as viewed 

 from proximal side, the diameter of the 

 poles of the ellipse (formed by the two 

 bladders) being broader than that of the 

 body between them. Body appears ap- 

 proximately circular in proximal view. 

 Viewed from either side the bulbose blad- 

 ders are inclined distally and a broad 

 sulcus appears between them on the distal 

 side. In lateral outline the body appears 

 broadly oval with the smaller pole toward 

 the distal sulcus. 



Size. — Various species range in total 

 length (bladder tip to bladder tip) from 

 as small as 40 to over 100 microns. 



Ornamentation. — External bladder sur- 

 face minutely granulose or rugose ; in- 

 ternally the bladders are usually at least 

 weakly reticulate. Proximal cap may be 

 nearly smooth, rugose or striate. Distal 

 body wall least ornamented. 



