identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
6B593F44FFD6547FFCA2EEC936D7F819.text	6B593F44FFD6547FFCA2EEC936D7F819.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Sphenophyta	<div><p>Sphenophyta</p> <p>Decorticated stem fragments and diaphragms of horsetails are common in the collection. Based on their dimensions (mostly the diameter of their axes), they can be segregated into two fossil taxa, Equisetites beanii (BUNBURY) SEWARD, 1894 and Equisetites columnaris (BRONGNIART) PHILLIPS, 1875. Most fragments belong to E. columnaris (Pl. 1, Figs 1–3) characterized by narrower axes, that are generally 40–60 mm wide (Lov. B 2.1–2.3, 4.1–2, 5, 7–10, 12, 18, 22.1–2, 23.1–3, 25, 28.1, 32, 51.1–3, 52–54, 54.1–2, 56, 59–60, 72). External preserved features are impressions of the leaf sheaths (37 × 10 mm) and microphylls (2 mm wide, with pointed apices; Lov. B 3.1, 4.1–4.2, 5, 8). Equisetites beanii (Pl. 1, Figs 4–5) was probably a larger plant, with axes reaching up to 100 mm in width (Lov. B 1, 3.1, 6, 11, 16–17, 21, 25). The fossil stem fragments are generally smooth, because leaf sheaths fall off easily. Equisetites beanii is a typical Middle Jurassic taxon resembling the Triassic equivalent Equisetites arenaceus (JAEGER) SCHENK, 1864, whereas E. columnaris has been described from both Lower and Middle Jurassic strata (Poland: Jarzynka and Pacyna 2015, England: Harris 1961).</p> <p>Krasser (1920: 4) listed only one horsetail species (Equisetites columnaris), because he considered E. beanii to be the thicker stems belonging to E. columnaris. In this case, E. beanii would represent the older, defoliated stems of E. columnaris (Schweitzer et al. 1997: 135–141). If both taxa belong to the same biological species, the specific name E. columnaris would have priority. In the Jurassic flora of Yorkshire, both species are present, with E. columnaris being more common than E. beanii. Both species may occur in the same deposits, but, at some localities, only one species occurs. For example, only E. columnaris is known from Hasty Bank, while the cliffs around Scarborough have yielded only E. beanii.</p> <p>One plant fossil (Lov. B 49.1–2; Pl. 1, Figs 10–11) represents a nodal fragment of Schizoneura SCHIMPER et MOUGEOT, 1844 with microphylls, which seem to arise from the same position on the axis and are basally connate. Krasser (1920: 9) indicated that this fragment might represent a badly preserved basal frond fragment of Dictyophyllum rugosum LINDLEY et HUTTON, 1834, whereas the label designates it Equisetites beanii (“ Asterophyllites Beblätterung ”). Furthermore, Krasser (1920) mentioned that the same specimen contained a fragment of Sagenopteris goeppertiana DE ZIGNO, 1865 (on p. 8) and Nilssonia compta (PHILLIPS) BRONGNIART, 1828 (on p. 9), but none of those could be identified on the slab.</p> </div>	https://treatment.plazi.org/id/6B593F44FFD6547FFCA2EEC936D7F819	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kustatscher, Evelyn;Scanu, Giovanni G.;Kvaček, Jiří;Van Konijnenburg-Van Cittert, Johanna H. A.	Kustatscher, Evelyn, Scanu, Giovanni G., Kvaček, Jiří, Van Konijnenburg-Van Cittert, Johanna H. A. (2016): The Krasser Collection In The Faculty Of Sciences, Charles University, Prague - New Insights Into The Middle Jurassic Flora Of Sardinia. Fossil Imprint 72 (3 - 4): 140-154, DOI: 10.14446/FI.2016.140, URL: http://fi.nm.cz/clanek/the-krasser-collection-in-the-faculty-of-sciences-charles-university-prague-new-insights-into-the-middle-jurassic-flora-of-sardinia/
6B593F44FFD5547DFCDDE9363409FC1D.text	6B593F44FFD5547DFCDDE9363409FC1D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Coniferophyta	<div><p>Coniferophyta</p> <p>The conifers are among the most abundant groups in this plant assemblage. Geinitzia divaricata (BUNBURY) HARRIS, 1979 is one of the most common taxa (Pl. 3, Figs 1, 7). The shoot fragments (Lov. B 3.2, 5, 10, 12, 15, 17, 22.1–2, 28.1–4, 30.1–2, 35.1, 37, 55, 81, 92.1–3, 109) are up to 40 mm long and 30 mm wide, with an axis of 1–2 mm width. Lateral shoots arise alternately at acute angles. Leaves are helically arranged, arch outward at a wide angle (70–90°), and are attached by their entire base. They are falcate, with only one vein and a pointed or slightly rounded apex. They are 2–5 mm long and 0.5–2 mm wide. Krasser (1920: 18) attributed the specimens to Cheirolepis setosus (PHILLIPS) SEWARD, 1900, whereas Edwards (1929) assigned them to Cryptomerites divaricatus BUNBURY, 1851.</p> <p>Elatides williamsonii (LINDLEY et HUTTON) NATHORST, 1897 is also common (Pl. 3, Figs 5, 9); it is characterized by elongated leaves of 5–8 mm length and 1–2 mm width, arranged in a loose helix (Lov. B 14.1–2, 17.1–2, 27.1–2, 28.2–3, 29, 51.2, 72.1–3, 78, 90, 94, 107.2, 122.1–3, 127.6, B, C1–5). Krasser (1920: 18) identified this species as Pagiophyllum williamsonii (BRONGNIART) SEWARD, 1900. Two specimens (Lov B 9, 127.9) with linear leaves are identified as Elatocladus sp. Several shoot fragments with broad, leathery leaves are assigned to Brachyphyllum sp. (Lov. B 56, 58), and other shoot fragments with very small (&lt;5 mm long, 1 mm wide) leaves to Pagiophyllum sp. (Lov. B 75.1–2, 99, 124, 126, 127.1–2, 127.5, 127.7–9) (Pl. 3, Fig. 8).</p> <p>The wood fragment (Lov. B 128), labelled as Dadoxylon sp. might belong to Agathoxylon GREGUSS, 1952. Krasser (1920: 20) established Araucarites sardinicus (KRASSER) KRASSER, 1920 (formerly Cycadeospermum sardinicum) for sub-triangular ovuliferous scales (Lov. B 50, 50.1–2, 55, 56, 57.1–2), each with a large single seed (Pl. 3, Figs 2–3). The scales are 20–25 mm long and 20–22 mm wide, with a central depression or seed of 15–17 × 10–12 mm. The ovuliferous cones (Lov. B 127.8, B) are too fragmentary for determination. Fragments resembling pine-like leaves, with a transversely wrinkled lamina (Lov. B 89, 91) were ascribed by Krasser (1920: 19) to Pityophyllum nordenskioldii (HEER) SEWARD, 1919; unfortunately, no cuticle is preserved to confirm this attribution.</p> </div>	https://treatment.plazi.org/id/6B593F44FFD5547DFCDDE9363409FC1D	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kustatscher, Evelyn;Scanu, Giovanni G.;Kvaček, Jiří;Van Konijnenburg-Van Cittert, Johanna H. A.	Kustatscher, Evelyn, Scanu, Giovanni G., Kvaček, Jiří, Van Konijnenburg-Van Cittert, Johanna H. A. (2016): The Krasser Collection In The Faculty Of Sciences, Charles University, Prague - New Insights Into The Middle Jurassic Flora Of Sardinia. Fossil Imprint 72 (3 - 4): 140-154, DOI: 10.14446/FI.2016.140, URL: http://fi.nm.cz/clanek/the-krasser-collection-in-the-faculty-of-sciences-charles-university-prague-new-insights-into-the-middle-jurassic-flora-of-sardinia/
