The Rhaeto-Jurassic flora of Iran and Afghanistan. 12. Cycadophyta II. Nilssoniales

Schweitzer, Hans-Joachim; Kirchner, Martin; Cittert, Johanna H.A. van Konijnenburg‐van

doi:10.1127/palb/254/2000/1

Cited by 28 publications

(41 citation statements)

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“…Pterophyllum aequale is the most widespread bennettitalean species within Scania (represented at 10 major localities), and it is recognized with confidence only from uppermost Triassic strata (Pott and McLoughlin 2009). This stratigraphic distribution is consistent with other records of the species apart from a single Early Jurassic record in Iran (Schweitzer and Kirchner 2003).…”

supporting

confidence: 91%

The Rhaetian flora of Rögla, northern Scania, Sweden

Pott

McLoughlin

2011

Palaeontology

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Rögla is the northernmost locality yielding Mesozoic plant fossils in Scania, southern Sweden, and is one of the northernmost Rhaetian assemblages in Europe. The assemblage consists of over 500 specimens collected 50-60 years ago, of which 139 yielded identifiable plant remains referable to 15 plant species; another 19 specimens are tentatively assigned to four species because of their fragmentary preservation. The flora includes sphenophytes, ferns, cycads, bennettitaleans, seed ferns of uncertain alliance, conifers and some leaf remains that are tentatively assigned to ginkgophytes based on their epidermal anatomy. The species-level composition of the assemblage is consistent with a Rhaetian age and is similar to well-known floras from nearby Höganäs and Bjuv, except for the absence of cycads belonging to Nilssonia, which are very common in most other Scanian floras. The fossil assemblage is interpreted to derive from multistorey vegetation occupying moist habitats on a coastal plain. Strong affinities are evident with the coeval floras of Jameson Land, Greenland, reinforcing the concept of a distinctive North Atlantic floristic sub-province at the close of the Triassic.

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supporting

confidence: 91%

The Rhaetian flora of Rögla, northern Scania, Sweden

Pott

McLoughlin

2011

Palaeontology

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“…The earliest reference to Androstrobus is often cited as Schimper, 1872(e.g., Jongmans 1957Harris 1964;Hill 1990;Schweitzer et al 2000;Archangelsky and Villar de Seoane 2004;Peppe et al 2007; and others), but Schimper's publication of the generic diagnosis bears a publication date of 1870 and is accompanied by a description of a type species, A. zamioides.…”

Section: Nilssoniocladus Corrugatusmentioning

confidence: 95%

“…Most Androstrobus occurrences are Jurassic in age, with many species described (e.g., Harris 1941Harris , 1964 and others from formations in Great Britain (Yorkshire) and Greenland (Scoresby Sound). It has also been found in Jurassic rocks in the Middle East (Schweitzer et al 2000). In the Cretaceous, Androstrobus occurs throughout Europe-most notably in the English Wealden (Watson and Cusack 2005), where exceptionally preserved specimens have been recovered.…”

Section: Nilssoniocladus Corrugatusmentioning

confidence: 97%

“…In the fossil and modern examples of male cycad cones the sporophyll heads are widest toward the base of the cone and taper towards its apex ( Figure 5A, I). For examples of the application of this criterion see the fossil cone of Androstrobus piceoides Schweitzer (Schweitzer et al 2000) and the extant cone of Encephalartos villosus Lemaire (1867Lemaire ( , 1868 (Watson and Cusack 2005).…”

Section: Androstrobus Scutulatusmentioning

confidence: 98%

“…Given that the apex and base are not truncate or obtuse, respectively, the consistent width of the pinnae indicates that the pinnae could approach or even exceed a meter in length, which would suggest that they are simpleleaved rather than compound. Many modern cycads have leaves that are a meter or more in length, as do fossil genera such as Pseudoctenis (e.g., P. lanei, Harris, 1964), Nilsonia (e.g., N. grandifolia, Schweitzer et al, 2000), Nilssoniocladus and Nilssoniopteris. However, the size of O. longissima far exceeds that of the segments of any known compound-leafed cycadophyte, while none of the simple members of the group has parallel secondary venation.…”

Section: Orthoneura Longissimamentioning

confidence: 99%

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