Setal morphology of oral apparatus of Aegla longirostri Bond-Buckup & Buckup, 1994 (Decapoda: Aeglidae)
Abstract
The seta, a type of projection of the cuticle in crustaceans, has essential mechanical and sensory functions. Due to the diversity of their morphology and distribution patterns on the articles of different appendages, setae can be helpful as taxonomic characters. To assist future studies on the potential use of setae as a diagnostic character in aeglids, we used scanning electron microscopy to analyze the morphology of setae from the oral apparatus of Aegla longirostri Bond-Buckup & Buckup, 1994, and compared our data to the literature. We identified nine setal types (simple, serrate, stout serrate, sword, plumose, pappose, comb, serrulate, and cuspidate), of which the last two had not been previously described in adult aeglids. Our results are a first step towards future comparisons of setal morphology in the genus Aegla, which includes cryptic species complexes, to ascertain the usefulness of setae as a character to aid in the description of species of this group, which has a conserved general morphology.
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Aeglids possess dense setae distributed across the body surface, and adhesion of ash particles to these structures may interfere with chemo- and mechanoreception, potentially increasing exploratory behavior and delaying food localization.
“Aeglids possess dense setae distributed across the body surface [90,91], and adhesion of ash particles to these structures may interfere with chemo-and mechanoreception [92], potentially increasing exploratory behavior and delaying food localization, consistent with a sensory interference mechanism.”
From Wildfire Ash Alters Freshwater Crustacean Behavior: Disentangling the Contributions of Suspended Macroparticles and Ash‐Induced Alkalinization (2026) · cites this paper as [91]
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Pereira‐Silva, P. B., Pacheco, D. R., Kirsch, G., Araujo, R. M. G., Oscar, B. V. C., Matias, W. G., Santos, S., & Figueiredo, B. R. S. (2026) · Environmental Toxicology · doi:10.1002/tox.70178
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- Authors
- SBRUZZI, H., BARTHOLOMEI-SANTOS, M. L., & SANTOS, S.
- Affiliations
- Universidade Federal de Santa Maria (BR)
- Venue
- Zootaxa
- Publisher
- Magnolia Press
- Published
- 2024-01-18
- Volume
- 5403
- Issue
- 1
- Pages
- 51-64
- ISSN
- 1175-5326 (ISSN-L)
- 1175-5334
- OpenAlex
- W4390937653
- Cited by
- 3
- References
- 27
- Citations by year
- 2026: 2 · 2024: 1
- FWCI
- 0.82
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Zootaxa (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Ecology › Crustacean biology and ecology
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine Biology and Ecology Research
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Subterranean biodiversity and taxonomy
- Keywords
- Aegla longirostri, Aeglidae
- MeSH terms
- Animals, Microscopy, Electron, Scanning, Anomura, Sensilla
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