Genus - Sitona

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum


Results

4 results for "Sitona"

Sitona flavescens

University of Alberta E.H. Strickland Entomological Museum

SeasonalityMigration occurs in spring, with peak activity in April/May and September (Culik and Weaver 1994). IdentificationHas no setae. Lower third of rostrum is shallowly bisulcate. Has a distinct, weakly elevated, longutidual carnia that blends into the frontal groove. Eyes are convex. Pronotum is widest in the middle, sides are arcuate, anterior constriction line is not evident. Anterior constriction line on the ventral surface is evident about halfway between the coxae and the anterior of the prosternum. Sides of elytra are arcuate. Discal interstriae are 5 to 6 times wider than the striae. Vestiture of elytra has many flat, recumbent scales that are intermixed sparsely with very narrow scales. Most scales are golden or reddish. (Adapted from Bright 1994, Bright and Bouchard 2008).

Sitona lineellus

University of Alberta E.H. Strickland Entomological Museum

Common NameAlfalfa Curculio SeasonalityPeak periods of activity occur between April and June (Campbell et al. 1989). IdentificationBody length varies from 2.9 to 4.0 mm, excluding head. Integument is generally black with an occasional reddish tinge; tarsi, tibia, femora, and antennae are reddish. The rostrum surface is flat but may be weakly covex on the upper two thirds. The lower third of the rostrum may be weakly concave and the medial carnia is absent. Eyes are strongly covex and protuberant. The length of the pronotum equals the width. The pronotum is widest at the middle, the sides are weakly arcuate and the anterior constriction line is weakly evident. The pronotal surface is covered with deep and close punctures that possess forward pointing, slightly erect scales, giving the surface a shiny appearance. The prosternal groove is approximately equidistant from the fore-coxae and the anterior of the prosternum. Elytral sides are subparallel on the basal half, and the remainder is broadly rounded. Strial punctures are small, weakly impressed and each possesses a small recumbent seta. The vestiture is variable, but generally consists of dense, small, recumbent interstrial scales, that are white or brown. Females are similar to males, but the elytra are more inflated, lateral margins of elytra are more arcuate, the body is larger, and females have a more diffuse colour pattern. Adults are most easily recognized by: a) strongly convex eyes; b) narrow pronotum; c) small body size compared to other Sitona species; and d) median row of narrow and erect scales, coloured white in each elytral interstriae. (Adapted from Bright 1994, Bright and Bouchard 2008)

Sitona hispidulus

University of Alberta E.H. Strickland Entomological Museum

Common NameClover Root Weevil SeasonalityWeevils are active from spring to fall, when temperatures are 10 to 24° C (Campbell et al. 1989). IdentificationAdult S. hipidulus are distinguished from other adult Sitona weevils by the presence of a row of long and erect setae along the median of each elytral interstria. Eyes are weakly convex. Rostrum is without carnia. Frontal rostral groove extends from near the level of the antennal groove to above the upper eye level. Bodies are stout, ranging in length from 3.2 to 4.0 mm. Bodies are black, while antennae, tarsi and tibiae are a dark reddish black colour. The pronotum is wider than it is long, widest in the middle and strongly arcuate. The pronotal surface is shiny with large scattered deep punctures, each puncture possessing an erect seta. The groove on the prosternum is evident between the fore coxae and the anterior of the prosternum. The elytra are parallel for two thirds of the length and may be slightly arcuate. The elytral surface has large strial punctures that are not visible due to dense surface scales. The vestiture consists of dense, small scales, completely covering the interstriae and striae and includes median interstrial rows of erect, long and hair-like setae. Scales may be light brown, forming indistinct brownish spots. (Adapted from Bright 1994, Bright and Bouchard 2008)

Sitona californicus

University of Alberta E.H. Strickland Entomological Museum

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum