DOI: 10.1016/j.palaeo.2013.06.021
论文题名: Coprinisphaera akatanka isp. nov.: The first fossil brood ball attributable to necrophagous dung beetles associated with an Early Pleistocene environmental stress in the Pampean region (Argentina)
作者: Cantil L.F. ; Sánchez M.V. ; Bellosi E.S. ; González M.G. ; Sarzetti L.C. ; Genise J.F.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 386 起始页码: 541
结束页码: 554
语种: 英语
英文关键词: Coprinisphaera akatanka isp. nov.
; Dung beetles
; Early Pleistocene
; Necrophagy
; Palaeoenvironmental stress
; Pampean region
英文摘要: The known ichnospecies of Coprinisphaera have been usually linked to dung beetles of coprophagous habits living in grass-dominated environments inhabited by large herbivorous, which provide the dung for constructing brood balls. A new ichnospecies consisting of bispherical and thin-walled structures, Coprinisphaera akatanka, is separated from the pear-shaped and thick-walled structures that remains in C. tonni. C. akatanka consists of an egg chamber separated from the provision chamber by a deep neck. This morphology is comparable with brood balls constructed by extant species of Canthon showing necrophagous habits. This similarity suggests that the producers of C. akatanka might also display necrophagous feeding habits. The new bispherical structures were found in Sanandresian Aridisols (Early Pleistocene) developed in loess deposits of the Pampean region. Such paleosols record stable floodplains, covered with herbaceous and shrubby vegetation, under a seasonal, semiarid temperate-cold climate during a phase of glacier expansion in Patagonia. Sanandresian Land Mammal Substage shows a sparse record of large herbivorous, potential producers of suitable pads for dung beetles; only Neuryurus sp. and Glossotherium sp. are recorded in the area. The extinction of autochtonous taxa associated to palaeoenvironmental stress conditions during the Sanandresian Substage and the absence of the allochtonous taxa involved in Great American Biotic Interchange produced a bottleneck for dung availability. Such scenario of reduced dung resources would have favored dung beetle necrophagy in the Pampean region reflected herein with C. akatanka record. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69642
Appears in Collections: 过去全球变化的重建
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作者单位: CONICET-Museo Argentino de Ciencias Naturales, División Icnología, Av. Ángel Gallardo 470, 1405 Buenos Aires, Argentina
Recommended Citation:
Cantil L.F.,Sánchez M.V.,Bellosi E.S.,et al. Coprinisphaera akatanka isp. nov.: The first fossil brood ball attributable to necrophagous dung beetles associated with an Early Pleistocene environmental stress in the Pampean region (Argentina)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,386