Scierus
LeConte, 1876
Species Guides
2Scierus is a of crenulate bark beetles (Curculionidae: Scolytinae) established by LeConte in 1876. The genus contains at least three described : Scierus annectans, Scierus annectens, and Scierus pubescens. Species in this genus are associated with oak trees (Quercus), where they breed in dead wood and phloem tissue. The of Scierus annectens has been documented as , with in spring.
Pronunciation
How to pronounce Scierus: /ˈskiː.rəs/
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Identification
Scierus are distinguished as crenulate bark beetles, a characteristic referring to finely notched or scalloped elytral margins. Specific identification features for the are not documented in available sources. The three described species (S. annectans, S. annectens, S. pubescens) require examination for differentiation.
Images
Habitat
Dead branches of living oak trees and dead oak logs. occupy the phloem and outer bark layers of Quercus .
Seasonality
of Scierus annectens emerge from March to May, with peak in April. likely occurs as adults or late-instar larvae.
Diet
Phloem tissue of oak trees (Quercus).
Host Associations
- Quercus - breeding substrateDead branches of living oaks and dead oak logs; phloem and outer bark used for gallery construction and larval development
Life Cycle
. Females initiate galleries in the phloem; both sexes participate in gallery construction. are laid in along gallery walls. Larvae feed in the phloem, creating individual mines that widen as they grow. occurs in the outer bark or phloem. likely as or late-instar larvae.
Behavior
Both sexes participate in gallery construction in phloem tissue. Gallery initiation is performed by females.
Ecological Role
Primary decomposer of dead oak wood. Phloem-feeding contributes to nutrient cycling in oak by breaking down dead branches and logs.
More Details
Taxonomic Note
Scierus is placed in Curculionidae, Scolytinae (bark beetles). Some classifications historically treated Scolytinae as family . The was established by J.L. LeConte in 1876.
Data Limitations
Detailed information is available only for Scierus annectens. The other two described (S. annectans, S. pubescens) lack published studies in the provided sources. Geographic distribution for the is not documented in available materials.