Fossil Coleoptera from the Pilauco Site: An Approach to Late Pleistocene Microenvironments

Tello, Francisco; Torres, Fernanda

doi:10.1007/978-3-030-23918-3_12

Cited by 3 publications

(4 citation statements)

References 24 publications

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“…The fossil remains were recovered from the sediments using the water flotation technique described by Tello and Torres (2020). This method is an adaptation of kerosene flotation, described by Ashworth et al (1989), which consists of removal of fossil remains from the matrix using a washing machine.…”

Section: Methodsmentioning

confidence: 99%

“…The site has well-defined stratigraphy and good preservation of animal bones, plant remains and other fossil remains. Fossil beetles are also well preserved in this deposit, providing an opportunity to study the paleodiversity and distribution of many lineages of beetles (Tello et al, 2017;Tello and Torres, 2020). According to Pino et al (2019), the Pilauco site is composed of layers PB-6 to PB-9 (Fig.…”

Section: Stratigraphic Chronological and Paleontological Characteriza...mentioning

confidence: 98%

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A new extinct species of Scybalophagus dung beetle supports the collateral extinction hypothesis at the Chilean South American Pleistocene–Holocene boundary

Tello,

Pino,

Vaz‐De‐Mello

et al. 2023

J Quaternary Science

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The extinction of megaherbivores (weighing over 1000 kg) at the Pleistocene–Holocene boundary caused drastic changes at multiple trophic levels. However, few examples of Pleistocene insect extinction have been reported in the literature. Here we describe a new extinct dung beetle species, Scybalophagus brellenthinae sp. nov., based on fossil remains recorded from an Upper Pleistocene sequence from Chilean Northern Patagonia (Osorno city: 40°34′S, 73°07′W) dated between ~16 400 and ~12 800 cal a bp. S. brellenthinae is shown to be a species of the genus Scybalophagus based on the following morphological characters: a bidentate clypeus, teeth separated by U‐shaped emargination; protibiae with three major denticles on the external margin, separated by minor denticles, present at the base of the protibiae; and mesotibiae with prominent transverse carinae. Additionally, this new species can be clearly distinguished from extant species of the genus by its shiny green color. Extant Scybalophagus are true dung beetle species that depend on fresh mammal dung for their nest development. Therefore, we suggest that the mass extinction of the megaherbivores during a period of drastic environmental change at the Pleistocene–Holocene boundary in southern South America induced the collateral extinction of S. brellenthinae. Thus, this study provides new insights into dung beetle diversity of the past.

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Section: Methodsmentioning

confidence: 99%

Section: Stratigraphic Chronological and Paleontological Characteriza...mentioning

confidence: 98%

A new extinct species of Scybalophagus dung beetle supports the collateral extinction hypothesis at the Chilean South American Pleistocene–Holocene boundary

Tello,

Pino,

Vaz‐De‐Mello

et al. 2023

J Quaternary Science

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“…The fossil beetle remains were recovered from the sediment using an adaptation of the water flotation technique described by Hoganson et al (1989) (see also Tello and Torres 2020 ). The remains were collected from grid 18AC, at an elevation of 384 cm in bed PB-7.…”

Section: Methodsmentioning

confidence: 99%

“…According to recent paleo-inferences based on beetle records, Pilauco was dominated by large mammals and climatic transition. When compared with modern beetle assemblages, there was a persistent rich beetle fauna, which included dung beetles and other coprophilous insects ( Tello et al 2017 , 2019 ; Tello and Torres 2020 ).…”

Section: Study Site and Paleontological Contextmentioning

confidence: 99%

Onthophagus pilauco sp. nov. (Coleoptera, Scarabaeidae): evidence of beetle extinction in the Pleistocene–Holocene transition in Chilean Northern Patagonia

Tello¹,

Verdú²,

Rossini³

et al. 2021

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The South American Pleistocene–Holocene transition has been characterized by drastic climatic and diversity changes. These rapid changes induced one of the largest and most recent extinctions in the megafauna at the continental scale. However, examples of the extinction of small animals (e.g., insects) are scarce, and the underlying causes of the extinction have been little studied. In this work, a new extinct dung beetle species is described from a late Pleistocene sequence (~15.2 k cal yr BP) at the paleoarcheological site Pilauco, Chilean Northern Patagonia. Based on morphological characters, this fossil is considered to belong to the genus Onthophagus Latreille, 1802 and named Onthophagus pilaucosp. nov. We carried out a comprehensive revision of related groups, and we analyzed the possible mechanism of diversification and extinction of this new species. We hypothesize that Onthophagus pilaucosp. nov. diversified as a member of the osculatii species-complex following migration processes related to the Great American Biotic Interchange (~3 Ma). The extinction of O. pilaucosp. nov. may be related to massive defaunation and climatic changes recorded in the Plesitocene-Holocene transition (12.8 k cal yr BP). This finding is the first record of this genus in Chile, and provides new evidence to support the collateral-extinction hypothesis related to the defaunation.

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First Record of the Family Histeridae (Insecta: Coleoptera) in a Late Pleistocene Sequence from Chile

Tello

Arriagada²,

Pino

2019

Ameghiniana

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Fossil Coleoptera from the Pilauco Site: An Approach to Late Pleistocene Microenvironments

Cited by 3 publications

References 24 publications

A new extinct species of Scybalophagus dung beetle supports the collateral extinction hypothesis at the Chilean South American Pleistocene–Holocene boundary

A new extinct species of Scybalophagus dung beetle supports the collateral extinction hypothesis at the Chilean South American Pleistocene–Holocene boundary

Onthophagus pilauco sp. nov. (Coleoptera, Scarabaeidae): evidence of beetle extinction in the Pleistocene–Holocene transition in Chilean Northern Patagonia

First Record of the Family Histeridae (Insecta: Coleoptera) in a Late Pleistocene Sequence from Chile

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