ORIGINAL ARTICLE
Coniferophytes from the Bajo de Veliz Formation (Gzhelian-Asselian), San Luis Province, Argentina
1
Consejo Nacional de Investigaciones Científicas y Técnicas
2
Museo Argentino de Ciencias Naturales B. Rivadavia-División Paleobotánica, Av. Ángel Gallardo 470,
Buenos Aires, Argentina
3
Universidad Nacional de San Luis, Departamento de Geología, Av. Ejército de Los Andes 950, San Luis,
Argentina
These authors had equal contribution to this work
Online publication date: 2024-06-28
Publication date: 2024-06-28
Acta Palaeobotanica 2024; 64(1): 109-122
HIGHLIGHTS
- Systematic description of coniferophytes from the Gondwanan Bajo de Veliz Formation.
- Two types of foliage are recognized: heteromorphic and homomorphic.
- Lax-arranged ovules characterize the ultimate branches of Genoites and Buriadia.
- Compact cones are associated with branches bearing homomorphic leaves.
- For the first time, Buriadia is recognized in the Carboniferous-Permian of Argentina.
KEYWORDS
ABSTRACT
In this contribution, we analyze the presence of fossil coniferophytes from the Bajo de Veliz Formation
(Paganzo Basin) that were initially referred to Walchia or Paranocladus and have not been described
until now. These specimens consist mainly of leafy branches exhibiting foliar heteromorphism characteristic
of upper Paleozoic coniferophytes from Gondwana. This group includes Genoites sp. with lax arranged
ovules on the last order branches, Krauselcladus sp. represented by a small vegetative branch with biand
trifurcated leaves, and Buriadia cf. Buriadia heterophylla Seward et Sahni emend. Serbet, Escapa,
Taylor, Taylor et Cúneo, 2010, showed axes with multifid leaves and ovules on terminal branches. Vegetative fragments
with small lanceolate leaves are assigned to Ferugliocladus cf. F. riojanum Archangelsky et Cúneo, 1987.
In addition, an isolated, probably male reproductive structure similar to those known for th latter species was
identified. The presence of Buriadia is recognized for the first time in the Carboniferous-Permian of Argentina, as
well as the identification of vegetative buds or shoots, a previously undocumented characteristic for this Paleozoic
coniferophyte from Gondwana.
FUNDING
This research was supported by PROICO
03-0218 (Dr. Jorge Chiesa) and PICT 2020-1294
(Dr. Silvia Césari).
CONFLICT OF INTEREST
The authors have declared that no competing interests exist.
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CITATIONS (1):
1.
The lacustrine ecosystem of the Bajo de Veliz Formation: A wet spot at the Carboniferous-Permian boundary in westernmost Gondwana
Silvia N. Césari, Jorge Chiesa, Johana A. Fernández
Palaeogeography, Palaeoclimatology, Palaeoecology
Silvia N. Césari, Jorge Chiesa, Johana A. Fernández
Palaeogeography, Palaeoclimatology, Palaeoecology
| eISSN: | 2082-0259 |
| ISSN: | 0001-6594 |
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