Possible fungus-eating cucujiformian beetle larvae with setiferous processes from Cretaceous and Miocene ambers

IF 1.9 4区 地球科学 Q1 PALEONTOLOGY Fossil Record Pub Date : 2023-08-28 DOI:10.3897/fr.26.104553
Ana Zippel, C. Haug, Zeynep Elverdi, P. Müller, J. Haug
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Abstract

Beetle larvae represent important components of the modern-day fauna. This should have been the case in the past as well. Yet, fossil beetle larvae are rare, or at least are rare in the literature, as identifying a beetle larva to a narrower taxonomic group is very challenging. This is even more complicated if prominent features have evolved convergently in several lineages. Yet, even in such cases, an ecological interpretation of the fossils is possible if the convergent character is coupled to a specific life habit. For example, different, not closely related, beetle larvae that possess setiferous processes. We here report on three beetle larvae, one from Miocene Mexican and two from Cretaceous Kachin amber, Myanmar. These larvae possess setiferous processes, most similar to the processes of modern representatives of Cucujiformia, especially of the groups Endomychidae, Erotylidae, Cerylonidae and Coccinellidae. Considering the shape of the entire habitus, we see the most similarities between the new larvae and the modern larvae of Endomychidae. However, the new larvae and the larvae of modern representatives differ in certain aspects, most prominently in the body size. The fossils are smaller than their extant counterparts with setiferous processes. Hence the fossils could represent larvae of Endomychidae, but the case remains unclear. Despite this uncertainty, we suggest a lifestyle of the fossil larvae as fungus-eaters on rotting wood. This lifestyle is not only known from extant larvae of Endomychidae, but also from other larvae with similar processes.
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Possible白垩纪和中新世琥珀中具有固结过程的食真菌瓜甲虫幼虫
甲壳虫幼虫是现代动物群的重要组成部分。过去也应该是这样。然而,甲虫幼虫化石很罕见,或者至少在文献中很罕见,因为将甲虫幼虫鉴定为一个更窄的分类群是非常具有挑战性的。如果突出的特征在几个谱系中集中进化,这就更加复杂了。然而,即使在这种情况下,如果趋同特征与特定的生活习惯相结合,对化石的生态学解释也是可能的。例如,不同但亲缘关系不密切的甲虫幼虫具有刚毛状突起。我们在这里报道了三种甲虫幼虫,一种来自中新世墨西哥,两种来自白垩纪缅甸克钦琥珀。这些幼虫具有刚毛状突起,最类似于Cucujiformia的现代代表,尤其是Endomychidae、Erotylidae、Cerylonidae和Coccinellidae。考虑到整个栖息地的形状,我们发现新的幼虫和现代的Endomychidae幼虫之间最相似。然而,新幼虫和现代代表幼虫在某些方面存在差异,最突出的是体型。这些化石比现存的具刚毛突起的化石要小。因此,这些化石可能代表内孔虫科的幼虫,但情况尚不清楚。尽管存在这种不确定性,我们还是建议化石幼虫在腐烂的木头上以真菌为食。这种生活方式不仅从现存的Endomychidae幼虫中知道,而且从其他具有类似过程的幼虫中也知道。
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来源期刊
Fossil Record
Fossil Record PALEONTOLOGY-
CiteScore
3.60
自引率
7.10%
发文量
18
审稿时长
14 weeks
期刊介绍: Fossil Record (FR) is the palaeontological journal of the Museum für Naturkunde Berlin. This journal was founded in 1998 under the name Mitteilungen aus dem Museum für Naturkunde Berlin, Geowissenschaftliche Reihe and appears with two issues each year. Fossil Record publishes original papers in all areas of palaeontology including the taxonomy and systematics of fossil organisms, biostratigraphy, palaeoecology, and evolution. All taxonomic groups are treated, including invertebrates, microfossils, plants, and vertebrates.
期刊最新文献
The Rhabdodontidae (Dinosauria, Ornithischia), an enigmatic dinosaur group endemic to the Late Cretaceous European Archipelago Possible fungus-eating cucujiformian beetle larvae with setiferous processes from Cretaceous and Miocene ambers A description of a Denazinemys nodosa specimen (Testudinata, Baenidae) from the Late Cretaceous Kaiparowits Formation of southern Utah New findings of Prototherium ausetanum (Mammalia, Pan-Sirenia) from paving stones in Girona (Catalonia, Spain)? The helochelydrid turtle Helochelydra nopcsai from the Early Cretaceous (late Barremian – early Aptian) fissure fills of Balve, North Rhine-Westphalia, Germany, including a large sample of granicones
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