Pterostichus punctatissimus Randall. This species is one of the most attractive Pterostichus in North America. The sculpture of the elytra is irregular giving the impression to the naked eye that the striae bear large punctures. For that reason Randall named the species punctatissimus meaning the most punctured. Although not as common as Pterostichus adstrictus, this species is also a characteristic element of boreal forests in the Nearctic Region.
Yves Bousquet
CC BY 3.0
Bousquet Y (2012) Catalogue of Geadephaga (Coleoptera: Adephaga) of America, north of Mexico. ZooKeys 245: 1-1722. <a href="//doi.org/10.3897/zookeys.245.3416" class="extiw" title="doi:10.3897/zookeys.245.3416">doi:10.3897/zookeys.245.3416</a>