CONTRIBUTIONS TO THE STUDY OF THE EARLY JURASSIC PETRIFIED FOREST OF HOLBAV AND CRISTIAN AREAS (BRAȘOV REGION, SOUTH CARPATHIANS, ROMANIA), 2nd PART

Abstract

The present paper represents the second part of the palaeoxylotomical study on the “Grădinaru Collection” that is housed by the National Museum of Geology, Bucharest. By the study of a new material collected from the Getic domain of the South Carpathians, Romania, the following taxa were identified and discussed in detail: Protocupressinoxylon dragastanii, Protojuniperoxylon holbavicum (sp. nov.), Brachyoxylon holbavicum, B. cristianicum, Palaeoginkgoxylon sp., Bucklandia sp. A, and Bucklandia sp. B. All the studied specimens suggest to a tropical Early Jurassic petrified forest. Thus, the new data have not only palaeobotanical importance, but they also contribute to the palaeobiogeographic, palaeoecologic and palaeoclimatologic knowledge of the Mesophytic

Brachyoxylon fossil woods with traumatic resin canals from the Upper Cretaceous Cerro Fortaleza Formation, southern Patagonia (Santa Cruz Province, Argentina)

“…Brachyoxylon patagonicum was compared to most similar species of Brachyoxylon in Table 1. According to Philippe et al (2014) and Iamandei et al (2018) 1). Torrey (1923) described poorly marked growth rings for this species, sometimes delimited by a slight narrowing of tracheids, but he indicated that they could be false rings.…”

“…Alternatively, the TRC may been formed as response to abiotic factors, such from breakage of windblown branches and trunks. About 45% of the species of Brachyoxylon have one or more rows of TRC, which is a frequent characteristic of this fossil genus (e.g., Torrey, 1923;Iamandei et al, 2018;Jiang et al, 2020). Presence of TRC was documented in Telephragmoxylon, another fossil genus related to Cheirolepidiaceae (Torrey, 1921;.…”

“…Finally, there are some species such as B. holbavicum Iamandei, Iamandei and Grǎdinaru and B. saurinii Boureau and Serra that present isolated TRC (Boureau and Serra, 1961;Iamandei et al, 2018).…”