Stamnodes fergusoni Matson & Wagner, 2020: 79–90 Stamnodes fergusoni Stamnodes sp. Knudson & Bordelon 2002: 7–8 A review of Mexican Stamnodes (Lepidoptera: Geometridae) with the description of 16 new species Matson, Tanner A. European Journal of Taxonomy 2023 2023-12-14 911 1 79   Stamnodes fergusoni  Matson & Wagner, 2020: 79–90   Matson & Wagner, 2020 Matson & Wagner 2020 [519,1069,365,392] Insecta Geometridae Stamnodes Animalia Lepidoptera 19 20 Arthropoda species fergusoni   Figs 11, 93–95      Stamnodes fergusoni Matson & Wagner, 2020: 79–90. Typelocality: Ranch Road 189 ( 30.1823° N, 100.06° W), Val Verde County, Texas, USA. [USNM].   Stamnodes fergusoni– Rajaei et al.2022(online catalogue).    Stamnodessp.(undescribed) –  Knudson & Bordelon 2002: 7–8.    Distribution  Mexico:  Stamnodes fergusoniis found in the grassland, steppe, thorn scrub, and foothill habitats of the Chihuahuan Desert of northern Mexicowhere its host plant is abundant. The Mexican distribution remains largely unclarified, with only a few collections from the Tamaulipan mezquital ecoregion of north Coahuilanear Ciudad Acuña, and one record as far south as Sierra Mojada. So far as known,  S. fergusoniis the only  Stamnodeswith a principally Chihuahuan Desert distribution. USA:  Stamnodes fergusoniis primarily found in West Texasbut extending westward to southeastern Arizona.    Biology   Stamnodes fergusoniis univoltine with a peak autumn flight from September through October and a single generation with mature caterpillars from October into November. Over most of this species’ range, the pupa is believed to overwinter and remain in diapause until the following fall. Larvae ( Fig. 93) are hosted by  SalviaL. ( Lamiaceae) and were reared to maturity on rock sage (  Salvia pinguifolia(Fernald) Wooton & Standl.) in Arizonaand New Mexico( Matson & Wagner 2020). Matson & Wagner (2020)also suggested this species may feed on shrubby blue sage (  Salvia ballotifloraBenth.) in south Texasand Coahuilawhere  S. pinguifoliais absent. This potential  Salvia ballotiflorahost plant association has not been confirmed.    Molecular characterization This species is represented in BOLD as BIN: BOLD:ACO1632 (n = 6). At present, the average pairwise intraspecific distance is 0.76%, the maximum pairwise intraspecific distance is 1.59%, and the distance to the nearest neighbour,  Stamnodes aumatlapalli sp. nov.(n = 2), is 4.19%.    Remarks See Matson & Wagner (2020)for description, genitalic images, and other life history information.