Neophylax oligius
Ross, 1938
autumn sedge
Neophylax oligius, commonly known as the autumn sedge, is a North American caddisfly in the Uenoidae. In southern Ontario, larvae grow from late autumn through spring, with emerging in September and October following a summer prepupal . The species occupies stream and exhibits case-building typical of the .
Pronunciation
How to pronounce Neophylax oligius: //niːˈɒfɪlæks ɒˈlɪdʒiəs//
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Images
Habitat
Stream systems; in southern Ontario, larvae occur in specific stream sections positioned sequentially from headwaters downstream relative to .
Distribution
North America; confirmed present in southern Ontario, Canada and Vermont, United States.
Seasonality
Larvae grow from late autumn through spring; emerge in September and October.
Diet
Grazes on and fine organic particles from exposed surfaces of rocks.
Life Cycle
Development includes larval growth from late autumn through spring, followed by a summer prepupal and in autumn.
Similar Taxa
- Neophylax aniquaOccurs sequentially upstream in headwaters with slight differences in temporal development and timing.
- Neophylax concinnusOverlaps in and seasonal timing but shows differences in duration, case construction, and pupal case location.
- Neophylax fuscusShares autumn-through-spring larval growth pattern and autumn , but occupies different stream positions.
- Neophylax ornatusDistinguished by late summer and autumn larval growth, June following winter , and overlapping but distinct headwater .
More Details
Taxonomic Note
placement has been recorded as both Uenoidae and Thremmatidae in different sources; current consensus places the in Uenoidae.
Study Limitations
Detailed biological information is derived from a comparative study of five Neophylax in southern Ontario; specific traits of N. oligius were reported in the context of interspecific comparisons rather than single-species focus.