Gilboaphyton argentinum sp. nov.: A herbaceous lycopod from the early Carboniferous of Argentina

Abstract

-A new species of a herbaceous lycophyte with tripartite leaves is attributed to Gilboaphyton Arnold on the basis of the leaf morphology and the hexagonal shape of its leaf bases on the stem surface. The new species includes specimens previously classified as Archaeosigillaria conferta (Frenguelli) Menéndez,a primitive lycophyte which has been considered of biostratigraphic value in the Lower Carboniferous of Argentina. The excellent preservation of its delicate leaves adpressed to the stem has allowed to recognize its tripartite shape..

Carboniferous deposits of northern Sierra de Tecka, central-western Patagonia, Argentina: paleontology, biostratigraphy and correlations

“…Cucchi, 1980) and Valle Chico (Cucchi, 1980) formations crop out. These units were correlated to the lower and middle parts of the Tepuel Group (González, 1972;López Gamundi, 1980;Cucchi, 1980;Andreis et al, 1986;Carrizo and Azcuy, 2006;Taboada and Shi, 2011).…”

Early seed plants from Western Gondwana: Paleobiogeographical and ecological implications based on Tournaisian (Lower Carboniferous) records from Argentina

“…In addition to Pseudosporogonites and Warsteinia, Tournaisian floras from Western Argentina record other typically Devonian or Devonian-like taxa such as the lycophytes Gilboaphyton Arnold, 1937 andFrenguellia Arrondo et al, 1991. Gilboaphyton/Archaeosigillaria is clearly Devonian in Laurussia and it is never present in the Carboniferous elsewhere (Berry and Edwards, 1997) but Western Gondwana (Carrizo and Azcuy, 2006); while Frenguellia is a protolepidodendralean genus with a simple and "primitive" appearance (Arrondo et al, 1991) resembling typically Devonian taxa such as Leclercqia Banks et al or Colpodexylon Banks. Considering the homogeneity of the imbedding matrix, the "good" preservation state of some morphological details as well as the large size of some plant parts a reworking of macro-remains is here considered as impossible.…”

The marine upper Palaeozoic in Patagonia (Tepuel–Genoa Basin, Chubut Province, Argentina): 85years of work and future prospects

“…Later, only two bivalves and a single gastropod mould were reported but not described by González (1987). More conspicuous are plant fossils, which include Gylboaphytum argentinum Carrizo and Azcuy (2006) and Archaeosigillaria conferta (Menéndez), identified by Petriella and Arrondo (1978).…”

“…The type section continues with the Pampa de Tepuel Formation overlying the Jaramillo Formation. However, Carrizo and Azcuy (2006) suggested that a hiatus separated the two formations. The faunal succession in this formation was estimated to be from middle Carboniferous to earliest Permian age (Simanauskas and Sabattini, 1997;Taboada et al, 2005;Taboada, 2008).…”