. Maryland geological survey. nd. Occurrence.—Patuxent Foemation. Trents Keach, Virginia. Arun-del Formation. Hanover, Howard Brown estate (?), Maryland, Collection.—^TJ. S. National Museum. Genus WIDDRINGTONITES Endlicher[Synop. Conif., 1847, p. 271] The genus Widdringionites was established in 1847 by Endlicher withThuites gramineus Sternberg^ from the Tertiary of Perutz, Bohemia, ^ Sternberg, Fl. Vorwelt, Tentamen, 1825, p. xxxviii, pi. xxxv, fig. 4. Maryland Geological Survey 437 as the type. This he named Widdringtonites Ungeri including in itssynonymy Juniperites haccifera Unger, Thuia g
. Maryland geological survey. nd. Occurrence.—Patuxent Foemation. Trents Keach, Virginia. Arun-del Formation. Hanover, Howard Brown estate (?), Maryland, Collection.—^TJ. S. National Museum. Genus WIDDRINGTONITES Endlicher[Synop. Conif., 1847, p. 271] The genus Widdringionites was established in 1847 by Endlicher withThuites gramineus Sternberg^ from the Tertiary of Perutz, Bohemia, ^ Sternberg, Fl. Vorwelt, Tentamen, 1825, p. xxxviii, pi. xxxv, fig. 4. Maryland Geological Survey 437 as the type. This he named Widdringtonites Ungeri including in itssynonymy Juniperites haccifera Unger, Thuia graminea Brongn,, andMusettes Stolzii Sternberg. Three additional species were listed, onefrom the Cretaceous, one from the Wealden, and one from the characterization of the genus was as follows: Folia spiraliterinserta, pleraque squamseformia adpressa. Strobilus globosus, are perhaps a score of species referred to this genus at thepresent time ranging in age from the Triassic to the Miocene. It has. Fig. 15.—Sketch map of the world showing the segregation of the existingActinostrobinse and the Mesozoic occurrences of Frenelopsis and Widdring-tonites. Circles indicate Frenelopsis and crosses indicate Widdringtonites. been commonly used for foliar specimens which resembled the livingforms but which lacked the certainty furnished by associated are known, however, in a large number of species, many of which,especially those of Tertiary age, are now referred directly to the genusWiddringtonia. Although fruiting specimens of Widdringtonites ramosus (Font.) areunknown, its immediate successor Widdringtonites Reichii (Ettings.)Heer of the Earitan and Magothy formations has, in the European 428 Systematic Paleontology material, furnished abundant four-valved cones which induce Velenovskyand Krasser to advocate its reference to Widdrmgtonia. Widdringtonitessubtilis Heer which is common in the later Cretaceous of the Coastal Plainhas also furnishe
Size: 1916px × 1304px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaleont, bookyear1901
