A small beetle larva preserved in 23-million-year-old Mexican amber: possible first fossil record of an immature variegated mud-loving beetle
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| Format: | Artículo científico |
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Sociedad Geológica Mexicana, A.C.
2022
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| author | Ana Zippel |
| author_facet | Ana Zippel |
| contents | A small beetle larva preserved in 23-million-year-old Mexican amber: possible first fossil record of an immature variegated mud-loving beetle Ana Zippel Carolin Haug Joshua Gauweiler Marie K. Hörnig Gideon T. Haug Joachim T. Haug Ciencias de la Tierra Miocene Byrrhoidea Heteroceridae Chiapas amber running waters Beetles occupy a vast amount of different ecological roles in both terrestrial and freshwater ecosystems. The often very specialised morphology of the adults can frequently be associated with their specific roles. Yet, the ecologically independent larvae of the same species are often unknown; this applies even more so to fossils. Here we report a new fossil beetle larva preserved in Mexican amber. The beetle larva was documented via digital microscopy and X-ray micro-computed tomography (X-ray µCT). The observed features, especially of the trunk, but also the maxillo-labial complex as well as the moulting suture of the head capsule are reminiscent to those of larvae of variegated mud-loving beetles, Heteroceridae. The trunk end is tube-like and protrudes ventro-terminally from abdomen segment 9. While present in other beetle lineages, this morphology is in these lineages, for example, not combined with a simple moulting suture. Some features potentially further supporting an interpretation as a larva of Heteroceridae are not accessible. The interpretation yet remains the most compatible one. Assuming a similar life style to modern larvae of Heteroceridae indicates an original lifestyle associated with running waters, but not within these. Heteroceridae is an ingroup of Byrrhoidea; the fossil record of byrrhoidean larvae is still very scarce. The new fossil hence adds a rare ecological function to the Miocene amber fauna, representing the first fossil record of a larva of Heteroceridae and expanding the fossil record of byrrhoidean larvae. 2022 artículo científico 1405-3322 https://www.redalyc.org/articulo.oa?id=94375432005 https://www.redalyc.org/journal/943/94375432005/ https://www.redalyc.org/journal/943/94375432005/html/ https://www.redalyc.org/journal/943/94375432005/94375432005.epub https://www.redalyc.org/journal/943/94375432005/movil https://doi.org/10.18268/BSGM2022v74n2a150322 en http://www.redalyc.org/revista.oa?id=943 Boletín de la Sociedad Geológica Mexicana application/pdf Sociedad Geológica Mexicana, A.C. Boletín de la Sociedad Geológica Mexicana (México) Num.2 Vol.74 |
| format | Artículo científico |
| id | redalyc_94375432005 |
| institution | Redalyc |
| language | en |
| publishDate | 2022 |
| publisher | Sociedad Geológica Mexicana, A.C. |
| spellingShingle | A small beetle larva preserved in 23-million-year-old Mexican amber: possible first fossil record of an immature variegated mud-loving beetle Ana Zippel Ciencias de la Tierra Miocene Byrrhoidea Heteroceridae Chiapas amber running waters A small beetle larva preserved in 23-million-year-old Mexican amber: possible first fossil record of an immature variegated mud-loving beetle Ana Zippel Carolin Haug Joshua Gauweiler Marie K. Hörnig Gideon T. Haug Joachim T. Haug Ciencias de la Tierra Miocene Byrrhoidea Heteroceridae Chiapas amber running waters Beetles occupy a vast amount of different ecological roles in both terrestrial and freshwater ecosystems. The often very specialised morphology of the adults can frequently be associated with their specific roles. Yet, the ecologically independent larvae of the same species are often unknown; this applies even more so to fossils. Here we report a new fossil beetle larva preserved in Mexican amber. The beetle larva was documented via digital microscopy and X-ray micro-computed tomography (X-ray µCT). The observed features, especially of the trunk, but also the maxillo-labial complex as well as the moulting suture of the head capsule are reminiscent to those of larvae of variegated mud-loving beetles, Heteroceridae. The trunk end is tube-like and protrudes ventro-terminally from abdomen segment 9. While present in other beetle lineages, this morphology is in these lineages, for example, not combined with a simple moulting suture. Some features potentially further supporting an interpretation as a larva of Heteroceridae are not accessible. The interpretation yet remains the most compatible one. Assuming a similar life style to modern larvae of Heteroceridae indicates an original lifestyle associated with running waters, but not within these. Heteroceridae is an ingroup of Byrrhoidea; the fossil record of byrrhoidean larvae is still very scarce. The new fossil hence adds a rare ecological function to the Miocene amber fauna, representing the first fossil record of a larva of Heteroceridae and expanding the fossil record of byrrhoidean larvae. 2022 artículo científico 1405-3322 https://www.redalyc.org/articulo.oa?id=94375432005 https://www.redalyc.org/journal/943/94375432005/ https://www.redalyc.org/journal/943/94375432005/html/ https://www.redalyc.org/journal/943/94375432005/94375432005.epub https://www.redalyc.org/journal/943/94375432005/movil https://doi.org/10.18268/BSGM2022v74n2a150322 en http://www.redalyc.org/revista.oa?id=943 Boletín de la Sociedad Geológica Mexicana application/pdf Sociedad Geológica Mexicana, A.C. Boletín de la Sociedad Geológica Mexicana (México) Num.2 Vol.74 |
| title | A small beetle larva preserved in 23-million-year-old Mexican amber: possible first fossil record of an immature variegated mud-loving beetle |
| topic | Ciencias de la Tierra Miocene Byrrhoidea Heteroceridae Chiapas amber running waters |
| url | https://www.redalyc.org/articulo.oa?id=94375432005 https://www.redalyc.org/journal/943/94375432005/ https://www.redalyc.org/journal/943/94375432005/html/ https://www.redalyc.org/journal/943/94375432005/94375432005.epub https://www.redalyc.org/journal/943/94375432005/movil https://doi.org/10.18268/BSGM2022v74n2a150322 |