The unique gravireceptor organs of Pleurodasys helgolandicus (Gastrotricha: Macrodasyida)
| Autor: | Marco Ferraguti, Roberto Marotta, M. Antonio Todaro |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Sensory organ
Chemoreceptor biology Arthropod cuticle Sensory system Gastrotrich Anatomy Macrodasyida biology.organism_classification Gastrotricha ultrastruttura organi di senso invertebrati equilibrio meiofauna mediterraneo fauna Pleurodasys helgolandicus Body surface Animal Science and Zoology Developmental Biology |
| Zdroj: | Zoomorphology. 127:111-119 |
| ISSN: | 1432-234X 0720-213X |
| DOI: | 10.1007/s00435-008-0056-6 |
| Popis: | The drumstick-like organs of the marine interstitial gastrotrich Pleurodasys helgolandicus Remane, 1927 were studied using optical and electron microscopy, in order to widen our knowledge of the sensory organs among gastrotrichs. The drumstick-like sensory organs are paired, symmetrical structures located on the dorsal side of the post-cephalic region of the body. Each sensory organ is formed by an outgrowth of the lamellar exocuticle covering the body surface, and it consists of an elongated, cylindrical hollow stalk surmounted by a hollow bulbous tip, housing in its cavity a dense spherical body. Compared with the three main sensory structures recognized among Gastrotricha, i.e., mechanoreceptors, photoreceptors, and chemoreceptors, the organization of the drumstick-like sensory organ matches that of mechanoreceptors. In particular, we suggest that the drumstick-like sensory organs of P. helgolandicus are gravireceptor organs, analogous to the orthopteran “plumb bob-like” receptors. This is the first description of a putative gravireceptor organ among gastrotrichs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink