Of the twelve British species of Myrmica, this is one of the less widely distributed and least well known in terms of its biology and ecology. Morphologically, M. sulcinodis is typical of the genus in possessing a two-segmented 'waist', pectinate spurs on all tibiae, well developed propodeal spines and a sting in the females. The shape of the antennal scape provides a good character for separation from other British Myrmica. Females of M. sulcinodis are also characterised by a deep red and black coloration and pronounced rugose sculpturing of the cuticle.
This ant is largely restricted to well-drained upland heather moors in south west and northern England and in Scotland. It also occurs locally on some lowland heaths in southern England. There are a few records from Wales but none from Ireland. Overseas, occurs from arctic Scandinavia south to Portugal and east to eastern Siberia.