Tremacyllus incipiens Rovereto 1914
Authors/Creators
- 1. Instituto de Estratigrafía y Geología Sedimentaria Global (IESGLO-CONICET), Facultad de Ciencias Naturales e IML, Universidad Nacional de Tucumán, Miguel Lillo 205, T 4000 JFE San Miguel de Tucumán (Argentina) and Cátedra de Paleontología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Catamarca, Avenida Belgrano 300, K 4700 AAP, San Fernando del Valle de Catamarca, Catamarca (Argentina) and Instituto Superior de Correlación Geológica (INSUGEO-CONICET), Universidad Nacional de Tucumán, Avenida Presidente Perón s / n, T 4105 XAY, Horco Molle, Tucumán (Argentina)
- 2. Instituto de Ecorregiones Andinas (INECOA), Instituto de Geología y Minería, Universidad Nacional de Jujuy, CONICET, Avenida Bolivia 1661, Y 4600 GNE, San Salvador de Jujuy (Argentina
- 3. Instituto de Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano (INCUAPA-CONICET), Universidad Nacional del Centro de la provincia de Buenos Aires, Avenida del Valle 5737, B 7400 JWI, Olavarría (Argentina
- 4. Instituto Superior de Correlación Geológica (INSUGEO-CONICET), Universidad Nacional de Tucumán, Avenida Presidente Perón s / n, T 4105 XAY, Horco Molle, Tucumán (Argentina
Description
Tremacyllus incipiens Rovereto, 1914
(Fig. 15)
Tremacyllus incipiens Rovereto, 1914: 46 (original description).
Tremacyllus latifrons Rovereto, 1914: 47 (n. syn.).
Tremacyllus impressus – Sostillo et al. 2018: 411 (in part).
MATERIAL. — Holotype: MACN-Pv 8163. Articulated skull from Santa María valley (Catamarca Province; Rovereto 1914).
REVISED DIAGNOSIS. — Excavated palate; P2 elliptical with its major axis almost mesiodistally oriented, markedly proportionally smaller than P3 and P4, and the P2 of Tremacyllus impressus; P3 elliptical with its major axis obliquely oriented (distolingual-mesiolabially); P4 with almost rectangular distolingual face with rounded edges, ectoloph slightly concave in the distal section and convex near the parastyle region, straight distal face oriented perpendicular to the mesiodistal axis of the tooth and mesial face obliquely oriented (distolingual-mesiolabially) well-differentiated from lingual one, both forming an obtuse angle; upper premolars clearly less imbricated than in Tremacyllus impressus (modified from Rovereto 1914; Cerdeño & Bond 1998).
OCCURRENCE. — Chiquimil Formation (El Jarillal Member, Late Miocene, Tortonian; Latorre et al. 1997), Villavil locality (Catamarca Province, Argentina). Andalhuala Formation (Late Miocene-Early Pliocene, Messinina-Zanclean; Georgieff et al. 2017), Entre Ríos, Loma Rica, Corral Quemado, Río Yaspis, western slopes of Cerro Pampa (Catamarca Province, Argentina), and Encalilla (Tucumán Province, Argentina) localities.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Material sample ID
- MACN-Pv 8163
- Scientific name authorship
- Rovereto
- Kingdom
- Animalia
- Phylum
- Chordata
- Order
- Notoungulata
- Family
- Hegetotheriidae
- Genus
- Tremacyllus
- Species
- incipiens
- Taxon rank
- species
- Type status
- holotype
- Taxonomic concept label
- Tremacyllus incipiens Rovereto, 1914 sec. Armella, Ercoli, Bonini & García-López, 2022
References
- ROVERETO C. 1914. - Los estratos araucanos y sus fosiles. Anales del Museo Nacional de Historia Natural 25: 1-247. https://www.biodiversitylibrary.org/page/14606247
- SOSTILLO R., CERDENO E. & MONTALVO C. I. 2018. - Taxonomic implications of a large sample of Tremacyllus (Hegetotheriidae: Pachyrukhinae) from the late Miocene Cerro Azul Formation of la Pampa, Argentina. Ameghiniana 55 (4): 407-422. https://doi.org/10.5710/AMGH.18.07.2017.3146
- CERDENO E. & BOND M. 1998. - Taxonomic Revision and Phylogeny of Paedotherium and Tremacyllus (Pachyrukhinae, Hegetotheriidae, Notoungulata) from the late Miocene to the Pleistocene of Argentina. Journal of Vertebrate Paleontology 18 (4): 799-811. https://doi.org/10.1080/02724634.1998.10011108
- LATORRE C., QUADE J. & MCINTOSH W. C. 1997. - The expansion of C 4 grasses and global change in the late Miocene: stable isotope evidence from the Americas. Earth and Planetary Science Letters 146 (1 - 2): 83-96. https://doi.org/10.1016/S0012-821X(96)00231-2
- GEORGIEFF S. M., MURUAGA C. M., IBANEZ L. M., SPAGNUOLO C., BONINI R., ESTEBAN G., NASIF N. & DEL PERO M. A. 2017. - Estilos de deformacion, cronoestratigrafia y evolucion paleoambiental de las unidades neogenas de las Sierras Pampeanas Noroccidentales de Catamarca y Tucuman, Argentina, in MURUAGA C. M. & GROSSE P. (eds), Ciencias de la Tierra y Recursos Naturales del NOA. Relatorio del XX Congreso Geologico Argentino. San Miguel de Tucuman: 254-268.