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Faunal Characterisation of Neogene and Pleistocene Localities of the State Jalisco, Mexico

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Faunal Characterisation of Neogene and Pleistocene Localities of the State Jalisco, Mexico ©Staatl. Mus. f. Naturkde Karlsruhe & Naturwiss. Ver. Karlsruhe e.V.; download unter www.zobodat.at carolinea, 62 (2004): 63-68, 2 Abb., 1. Taf.; Karlsruhe, 15.12.2004 63 H. D ieter Schreiber Faunal characterisation of Neogene and Pleistocene localities of the State Jalisco, Mexico Abstract The collection at the MPG (see fig. 1) contains fossil The collection of the Museo de Paleontología de Guadalajara, remains of vertebrates (Mammalia, Aves, Reptilia, Jalisco, Mexico (MPG) contains fossils of vertebrates from Amphibia, Pisces) and plant remains (e.g. siliceous several localities in the State Jalisco, SW-Mexico. The locali­ ties are Miocene up to Pleistocene in age. Based on investiga­ wood) from Miocene up to late Pleistocene localities. tions during a visit at the MPG in 2003 a faunal list and a short Unfortunately, precise coordinates of the localities or characterisation of the faunal assemblage are presented in strata of most fossils are unknown. Whereas coordi­ comparison to the localities Rancho la Brea (California, USA) nates and stratum are reported for a skeleton of a re­ and Mina (Nuevo León, NE-Mexico). Potential projects for fur­ cently excavated gomphotherid, the lack of precise de­ ther investigations on the fossil material and the localities are proposed. tails on the fossil sites and in consequence their ages is a result of the historic origin of the collection. Kurzfassung Faunistische Charakterisierung von Neogenen und Plei- stozänen Fundstellen des Staates Jalisco, Mexiko Die Sammlung des Museo de Paleontología de Guadalajara, Origin of the collection Jalisco, Mexico (MPG) umfasst Wirbeltierfossilien aus mehre­ ren Fundstellen im Bundesstaat Jalisco, SW-Mexiko. Das Al­ Fossil remains were always the special private interest ter dieser Fundstellen reicht vom Miozän bis ins Pleistozän. of Federico A. Solórzano Barreto, an engineer of phar­ Aufbauend auf den Untersuchungen während eines vierwöchi­ gen Aufenthaltes in Guadalajara 2003 wird eine Faunenliste macology and chemistry, who for 50 years collected und kurze Charakterisierung der Faunenassoziation der fossil remains from Neogene and Quaternary in the Sammlung des MPG im Vergleich zu Rancho la Brea (Kalifor­ State of Jalisco and especially Guadalajara. After a nien, USA) und Mina (Nuevo León, NE-Mexico) präsentiert. short time he became known as a person being inter­ Mögliche zukünftige Projekte zur weitergehenden Bearbeitung ested in ‘old bones’, which occasionally were found by der Sammlung und Erforschung der Fundstelle werden formu­ liert. people in the countryside. Over the years most of the fossil material was donated to him. In these circum­ Autor stances detailed information about the fossil sites, H. Dieter Schreiber, Staatliches Museum für Naturkunde Kar­ such as stratigraphic and taphonomic information, are lsruhe, Erbprinzenstraße 13, D-76133 Karlsruhe, e-mail: die- largely lacking. [email protected] . During the last decade, interest in the collection on the part of official institutions, especially the University of Guadalajara, has increased, but no decisions have Introduction been made for the future of the collection. Only the most complete material became a part of the exhibi­ The faunal characterisation based on the first visit at tion in the Museo Regional de Guadalajara. Later on the Museo de Paleontología de Guadalajara, Jalisco, the City of Guadalajara offered Mr. Solórzano Barreto Mexico (MPG) in September and October 2003 con­ a building in the Parque Agua Azul to store the collec­ cerning the agreement between the Museo del Desier­ tion and to create a museum that would serve as an to (Saltillo), Museo de Paleontología (Guadalajara), University of Karlsruhe (TH), and the State Museum of institution for educational and scientific work on the Natural History (Karlsruhe) for scientific exchange and fossils from the region of Jalisco. This Museum was support. opened in February 2000 as the Museo de Paleon­ The objective of the visit to the MPG was the paleonto­ tología de Guadalajara (MPG) with the support of the logical collection of Neogene and Pleistocene fossil re­ City of Guadalajara and the Instituto Nacional de mains from different localities in the State of Jalisco Antropología e Historia (INAH). Diana Solórzano (Mexico). The aims were to meet colleagues and to Perez, the daughter of Mr. Solórzano Barreto, became check out potential future projects within the scientific the first director. framework and scientific support of the MPG. 64 ©Staatl. Mus. f. Naturkde Karlsruhe & Naturwiss. Ver. Karlsruhe e.V.; download unter www.zobodat.atcarolinea, 62 (2004) Museo de Paleontología de Guadalajara (MPG) the MVB, and the JB and fiiiea with Plio-Pleistocene fluvial and lacustrine deposits. Today the lakes of Ato- During the last three years the Museo de Paleon­ tonilco, Zacoalco, San Marcos, Chapala and Sayula tología has established itself as a place for scientific are present indications that the widespread intramon­ education and paleontological research. In addition to tane basin system was temporarily occupied by lakes. the permanent exhibition, public services are en­ Most of the fossil sites, like Chapala, Zacoalco, Te- hanced by temporary exhibitions (e.g. an exhibition colotlan, and Juchitlan, which yielded the main part of about osteopathological diseases in the prehispanic the assemblage in the MPG collection, are genetically population of Jalisco). A recently excavated complete associated with the graben system. Those deposits skeleton of a gomphotherid became a part of the col­ represent mainly palaeo-lakes connected by rivers, lection. It will be described scientifically, published, which existed at certain times in the basins. and subsequently mounted in the exhibition. The internal organisation of the museum at the time of Overview of the faunal assemblage in the collection the visit was divided in the curatorial (fig. 2), and edu­ Besides complete skeletons ( Mammuthus, Stego- cational departments, one graphic designer, techni- mastodon, Neochoerus), isolated skulls, mandibles, cans, and the administration. Director: Diana isolated teeth, postcranial material and bone fragments Solórzano Perez, curatorial staff: Javier Juarez (Cura­ occur in a huge range of stages of bone preservation. tor), Ricardo Aguilar Alonso (working on Elephan- Additionally the material shows different colours from toidea), Óscar Rojas Santana (working on Equidae, white, brown colours, reddish and yellowish to black. Aves), Martha Castrejón (working on Camelidae), All together, a provisional summary allows the conclu­ Juan Baez Corpuss (working on Tayassuidae). sion that the fossils very likely come from different sites in the region of Guadalajara which should be distin­ guishable by taphonomical reasons. There should be Geology of the region and the fossil sites sites with low energy lacustrine, reducing environments yielding articulated dark coloured skeletons (e.g. Lake The basement in the region of Guadalajara is a result Chapala or Zacoalco), and higher energy, fluviatile, of tectonic developments since the Cretaceous (see more oxidising environments with isolated (disarticulat­ Ferrari et al. 2000). It is a composite of the Paleo­ ed), light coloured bones (probably like Juchitlan). gene volcanic rocks of the Sierra Madre Occidental The most detailed investigations on different material (SMO) in the north, of the mainly Mesozoic volcanic to achieve an overview and some details of the sam­ rocks of the Jalisco Block (JB) in the south, and of the ple have started with tooth material of the Gom- Plio-Pleistocene volcanic rocks of the western Mexi­ photheridae (pi. 1a) and Elephantidae (pi. 1b), been can Volcanic Belt (MVB) between them. As a result of continued with tooth material of Equidae (pi. 1c), tectonic movement in the continental crust, a graben Camelidae (pi. 1 d), and finally with material of system developed in the boundary area of the SMO, Rhinocerotidae (pi. 1e). A first unpublished faunal list Fig. 1 : Fossil sam­ ple from Chapala in the exhibition of the MPG.. - All Photos D. SCHREIBER. ©Staatl. Mus. f. Naturkde Karlsruhe & Naturwiss. Ver. Karlsruhe e.V.; download unter www.zobodat.at Schreiber : Neogene and Pleistocene of Jalisco 65 was made by Federico A. So lo r za n o Ba r r e to (1977) Xenarthra (taxa mentioned in his list are marked here with *). Ad- Eremotherium laurillardi Ve ditional information comes from the Museo Regional Glyptotherium cylindricum (Brachyostracon cylindricus*)[ pi. 1g] CZ de Guadalajara (marked with **). Some taxa in the Megatherium sp. (americanus? *) sample are assigned to localities (in the exhibition): Glossotherium sp. (herlani*,**) [pi. 1f] Tecolotlan (Te), Juchitlan (Ju), Atotonilco el Bajo (At), ? Dasypus novemcinctus * Venustiano Carranza (Ve), Chapala, Zacoalco (CZ). ? Holmesina septentrionalis * Today the collection at the MPG contains the following ? Megalonyx jeffersoni * Ve taxa (known as of October 2003): ? Nothrotherium shastense * Ve Aves Marsupialia IDideiphis sp. Pelecanus erythrorhynchos * Insectívora ? ~Mycteria wetmorei* Chiroptera Phalacrocorax sp. * Primates Homo sapiens * Phalacrocorax olivaceus * CZ Carnívora Felis {=Profelis) concolor Phoenicopterus sp. * -Felis panthera * Phoenicopterus ruber * Smilodon sp. (californicus *, **) CZ - Chen hyperborea * Lutra canadensis * ~ Buteogallus fragilis * Conepatus mesoleucos * ~Pliolymbus baryosteus * Canis lupus * CZ Ardea herodias * Canis latrans *, ** ~Anas acuta * Osteoborus cyonoides Ju ~Aythya affinis * Procyon
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