Size: 13-17.8mm

Seasonality: Year-round on the West Coast of NA, but adults tend to be slightly less active when the temperatures are high.

Distribution; Large populations may be found throughout CA, sparsely distributed across OR-WA, into coastal and south BC, UT, AZ, HI.  BERM, MX-BN, MX-BS, Mexico City and surrounding region, Western South America, South Afrika, small accidental introductions throughout Asia, Northern Afrika, East Australia, NZ, across Europe.

Information: Commonly found in urban settings seeking cover under anything you might have in your backyard. They can often be found in pairs. Becuase they are similar to at first glance, and are also found along side them, Laemostenus complanatus are often misidentified as Pterostichus, and vice versa.

Description: Body: Oblong-ovate, semi-slender, pronotum black; glossy, shallow wrinkles give appearance of formation of small cracks spreading away from the pronotal median line, median line deep. Head also glossy black, smooth, few or no facial furrows. Hind angles of pronotum obtuse; generally from 110° to 95°, margins curve back towards occiput gradually starting around the halfway point of the pronotal margins, two indentations, one on each hind corners of the disc face.     Antennae, starting around the first or second antennomere, sport a layer of pale setae, the antennae themselves are either black in colour, or a very dark red-brown.  Limbs: black.  Elytra may be matte, or glossy, black, green-blue, or blue.  Abdominal region tends to be roughly 2.5x the length of the pronotal disc.  7-10 striae on each elytron. Only four setae on the dorsal face of the pronotum; one on each of the hind angles, one on either margin, near the front angles, but not as near to the angle point as seen with the hind angles.  All setae pale.  Males and females may be sexed based on the width of the protarsi, as seen with other Platyninae.