Larval chaetotaxy and morphometry of Oosternum costatum (Coleoptera: Hydrophilidae) including a discussion of larval characters with phylogenetic relevance
The primary and secondary chaetotaxy of the head capsule and head appendages of the first and third larval instars of Oosternum costatum (LeConte, 1855) (Coleoptera: Hydrophilidae: Sphaeridiinae, Megasternini) are described for the first time. Morphometric characters derived from the head capsule an...
| Autor: | |
|---|---|
| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | Argentina |
| Recursos: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/82556 |
| Acesso em linha: | http://hdl.handle.net/11336/82556 |
| Access Level: | acceso abierto |
| Palavra-chave: | CHAETOTAXY COLEOPTERA HEAD HYDROPHILIDAE LARVA MEGASTERNINI MORPHOLOGY OOSTERNUM PHYLOGENY SPHAERIDIINAE WATER SCAVENGER BEETLES https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
| Resumo: | The primary and secondary chaetotaxy of the head capsule and head appendages of the first and third larval instars of Oosternum costatum (LeConte, 1855) (Coleoptera: Hydrophilidae: Sphaeridiinae, Megasternini) are described for the first time. Morphometric characters derived from the head capsule and mouthparts are included, together with detailed illustrations of all characters. The morphology and chaetotaxy of these larvae is compared to that of other larvae of the tribe Megasternini, confirming that chaetotaxy is a useful source of characters for phylogenetic analyses. Comparative notes with Sphaeridium Fabricius, 1775 (Sphaeridiini) are also included. |
|---|