identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03C787952A745B16FC7C9512447A88FF.text	03C787952A745B16FC7C9512447A88FF.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Agathoxylon Hartig 1848	<div><p>Genus Agathoxylon Hartig, 1848</p><p>TYPE SPECIES. — Agathoxylon cordaianum Hartig, 1848 . Triassic, Coburg. Bavaria, Germany.</p><p>Indeterminate abietinean type</p><p>EXAMINED SPECIMENS. — MPEF-Pb 10663 and 10673 (Table 1). GEOGRAPHIC OCCURRENCE. — Cerro Grande locality (Fig. 2), Chubut Province, Argentina. STRATIGRAPHIC OCCURRENCE. — Lago La Plata Formation (Kimmeridgian-Valanginian) .</p><p>DESCRIPTION</p><p>Growth ring boundaries are distinct (Fig. 5A). Latewood has 1-4 rows of radially flattened tracheids (Fig. 5B). Tracheids are roundish to polygonal as seen in transverse section (Fig. 5B). Isolated tracheids have thick walls and dark lumens (Fig. 5B). Tracheid tangential diameter is 40.2 (31.7-52.7, SD = 5.4) µm. Intertracheary pitting in radial walls is abietinean, exclusively uniseriate (Si = 1.00) and mostly non-contiguous (Cp = 13.8%) (Fig. 5C, D). Intertracheary radial pits are circular, 20.5 (17.0-24.7, SD = 2.1) µm in vertical diameter. Cross-fields are poorly preserved and with pits apparently contiguous and non-contiguous (Fig. 5E). Cross-field pits apparently bordered and c. 8 µm in diameter; 2-4 pits per cross-field (Fig. 5E). Horizontal and end walls of ray parenchyma cells are smooth. Rays are medium, 7.2 (1-19, SD = 4.2) cells and 230 (48-524, SD = 114) µm high (Fig. 5F). Rays are exclusively uniseriate (Fig. 5F) and have a frequency of 4.0 (3-6, SD = 0.9) rays per mm.</p><p>COMPARISONS</p><p>Diagnostic characters (e.g., intertracheary pitting and cross-field pits) are difficult to observe due to poor preservation, precluding confident assignment of the specimen to a fossil-genus. Occasionally, abietinean intertracheary pitting in radial walls is observed (n = 10 and 9 pits in each specimen, respectively). It is mostly non-contiguous and similar to that present in some fossil-genera such as Cupressinoxylon, Phyllocladoxylon Gothan, and Podocarpoxylon (Philippe &amp; Bamford 2008), which have previously been found in Patagonia (Pujana 2022).</p></div>	https://treatment.plazi.org/id/03C787952A745B16FC7C9512447A88FF	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	Greppi, Carlos D.;Pujana, Roberto R.;Scasso, Roberto A.	Greppi, Carlos D., Pujana, Roberto R., Scasso, Roberto A. (2026): A conifer wood assemblage from the Late Jurassic-Early Cretaceous, Fontana Lake area, Chubut Province, Argentine Patagonia. Geodiversitas 48 (15): 319-334, DOI: 10.5252/geodiversitas2026v48a15
