Orohermes crepusculus
This record describes Orohermes crepusculus (species). Recorded family: Corydalidae. Recorded order: Megaloptera.
Identification and Appearance
Posterior branch of Rs branched in both wings; posterior branch of M simple in hind wing; thoracic vestiture short and sparse ( vs long & wooly); male 10th tergite short ( vs elongate and deeply notched); female 10th tergite bifid, the dorsal lobe smaller ( vs both lobes long). (Penny 1999)
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Megaloptera (Alderflies, Dobsonflies, and Fishflies)
- Family
- Corydalidae (Dobsonflies and Fishflies)
- Subfamily
- Chauliodinae
- Genus
- Orohermes
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
OR-CA
Additional species information
Species notes from the sources
Etymology: Orohermes crepusculus (Chandler)
About Alderflies, Dobsonflies, and Fishflies: the wider group
Order-level background for Megaloptera, the group containing Orohermes crepusculus. Species-specific details appear above.
Group overview
Megaloptera (dobsonflies, fishflies, alderflies) includes ~380 described species. Male dobsonflies have enormous mandibles up to 40mm long - longer than their entire head - used in combat with rival males.
Ecological role of the group
Dobsonfly larvae (hellgrammites) are top predators in stream ecosystems, spending 2-5 years as aquatic nymphs before pupating. They can grow up to 90mm long, making them some of the largest aquatic insect larvae in North America.
Economic and practical significance of the group
Hellgrammites (dobsonfly larvae) are prized bait for bass fishing across North America. They are also important bioindicator species for freshwater stream health monitoring.
Recorded sources for this group: Freshwater ecology research, fishing industry. Imported estimates may describe particular regions or reporting periods.
Photos of Orohermes crepusculus (5)
Photo credits: Contributed by Brady Richards; Additional contributions by Aaron Schusteff , v belov
Frequently Asked Questions About Orohermes crepusculus
What is Orohermes crepusculus?
Orohermes crepusculus is a species in the family Corydalidae, within the order Megaloptera.
How big is Orohermes crepusculus?
wingspan: male holotype 84 mm, female allotype 104 mm
How do you identify Orohermes crepusculus?
Posterior branch of Rs branched in both wings; posterior branch of M simple in hind wing; thoracic vestiture short and sparse ( vs long & wooly); male 10th tergite short ( vs elongate and deeply notched); female 10th tergite bifid, the dorsal lobe smaller ( vs both lobes long). (Penny 1999)
Where is Orohermes crepusculus found?
Range: OR-CA