2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/25/2021 | 2:00 PM - 3:30 PM | PROGRESS IN THE LARVAL TAXONOMY OF NEARCTIC POLYCENTROPUS SENSU STRICTO (TRICHOPTERA: POLYCENTROPODIDAE) | Virtual Platform
PROGRESS IN THE LARVAL TAXONOMY OF NEARCTIC POLYCENTROPUS SENSU STRICTO (TRICHOPTERA: POLYCENTROPODIDAE)
Trichoptera, or caddisfly, larvae are important for water quality monitoring, fly fishing, and ecological and evolutionary research. Still, fewer than half of Nearctic Trichoptera larvae are associated and described, precluding identification beyond genus level. For the genus Polycentropus sensu stricto (Trichoptera: Polycentropodidae), this taxonomic impediment is even greater with larvae of only one of 29 species known and in need of redescription. DNA barcoding methods using a 658 bp fragment of Cytochrome c oxidase subunit I (COI) allow for association of insect life stages. Using mitochondrial DNA (n=13 species) and geographic-based (n= 1 species) larval-adult association of museum specimens and freshly collected material, the identities of larvae of 14 of the 29 Nearctic species are now known. Morphological discrimination between larvae is described and illustrated. Characters found to be informative for species-level larval identification include muscle scar patterning, head color and pigment banding, anal claw curvature, and ratios of foreleg segmentation. Ongoing directions are discussed including additional association and sampling efforts and production of discriminatory matrices for the Nearctic fauna. Finally, the efficacy of the current keys to larval Nearctic polycentropodids is discussed in light of new findings.
- Stream
- Genomics
- Aquatic–terrestrial biodiversity
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Presenters/Authors
Alexander Orfinger
(), Florida A&M University / University of Florida, a.orfinger@ufl.edu;
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Andrew Rasmussen
(), Florida A&M University, andrew.rasmussen@famu.edu;
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Raymond Hix
(), Florida A&M University, raymond.hix@famu.edu;
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