Squamapion vicinum
Creators: name: Giusto, Carlo
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Brentidae
Squamapion
Squamapion vicinum

description: Key to European species related to Squamapion vicinum
1 Vestiture conspicuous, composed of long piliform scales; on elytral interstriae arranged in multiple rows, particularly confused at base of interstriae 2–4; meso- and metanepisterna and mesepimera almost completely concealed by vestiture. Oligophagous on Mentha. Distribution: France (Corse), Italy (Sardinia and Sicily)....... S. consors consors (Desbrochers des Loges, 1875)
- Vestiture inconspicuous to evident, composed of piliform scales; on elytral interstriae arranged in a single row and, only at base of interstriae 2–4, more numerous, forming short multiple rows; meso- and metanepisterna and mesepimera never almost completely concealed by vestiture........................................................................ 2
2 Elytral humeral calli well developed, prominent. Prothorax clearly narrower than elytra and apically constricted to form a sort of neck (Figs 3, 4); ebw/pw ± 1.37........................................................................ 3
- Elytral humeral calli developed, but weakly prominent. Prothorax narrower than elytra, apically constricted, but not forming a sort of neck (Figs 1, 2, 5, 6); ebw/pw Ĺ 1.37................................................................ 5
3 Body larger, length—on the average— 1.96 mm (♂) or 2.05 mm (♀). Vestiture incospicuous, composed of short hair-like scales. Protibiae long and, especially in female, visibly outcurved. Oligophagous on Mentha. Distribution: European-Asiatic species. Widespread from East Siberia to almost whole Europe and North Africa................ S. vicinum (Kirby, 1808)
- Body smaller, less than 1.82 mm (♂) or 1.86 mm (♀) in length. Vestiture clearly visible, composed of piliform scales. Protibiae short and straight...................................................................................... 4
4 Rows of scales on elytral striae and intervals very similar, particularly in males. Prothorax, in dorsal view, subrectangular with moderately rounded sides; prescutellar fovea minute. Host plant unknown, probably associated with Thymus (Wanat, pers. comm.). Distribution: Poland, Austria, Ukraine ....................................... S. mroczkowskii Wanat, 1997
- Rows of scales on elytral intervals more evident than those on elytral striae, particularly in males. Prothorax, in dorsal view, subtrapezoidal with rounded sides; prescutellar fovea well developed. Monophagous on Origanum vulgare. Distribution: Spain, France, Luxembourg, The Netherlands, Sweden, Germany, Switzerland, Austria ........... S. origani (Planet, 1918)
5 Body length, on the average, 1.72 mm (♂) or 1.81 mm (♀). Vestiture composed of fine, almost hair-like scales; on elytral intervals hardly touching each other. Mesorostral dilatation rounded (Figs 7–10). Elytral maximum width in the middle (Figs 1, 2). Monophagous on Clinopodium alpinum. Distribution: Austria ..................................... S. alpinum n. sp.
- Body length, on the average, 1.47 mm (♂) or 1.52 mm (♀). Vestiture composed of long, piliform and subtly lanceolate scales, on elytral intervals mostly touching each other or even slighty overlapping. Mesorostral dilatation weakly dentiform (Figs 15– 18). Elytral maximum width in the basal third (Figs 5, 6). Oligophagous on Thymus. Distribution: European-Asiatic species. Widespread from Mongolia to whole Europe and North Africa............................. S. atomarium (Kirby, 1808)
description: Published as part of Giusto, Carlo, 2018, Squamapion alpinum n. sp. from Austria (Coleoptera, Apionidae), pp. 401-414 in Zootaxa 4407 (3) on page 411, DOI: 10.11646/zootaxa.4407.3.7, http://zenodo.org/record/1216638