Pycnosiphorus lessonii lessonii (Buquet 1842: 283)
.......Lucanus lessonii (Buquet 1842: 283) (orig. combination)
P. lessonii mandibularis (Solier 1851: 56), subsp.
.......P. germaini Numhauser 1985: 71, (synonym)
P. lessonii elongatus (Deyrolle in Parry 1870: 96), subsp.
P. lessonii marginipennis Deyrolle in Parry 1870: 95, subsp.
.......P. pulcher Landin 1955: 4, (synonym)
P. lessonii ugartei Paulsen 2010: 122, subsp.

P. lessonii, male (left) and female (right). ...Photos by M.J. Paulsen.
P. lessonii elongatus, male (left) and female (right).
P. lessonii mandibularis, males showing variation in vestiture.
P. lessonii marginipennis, male (left) and female (right).
P. lessonii ugartei, male (left) and female (right).
Distribution of P. lessonii subspecies: P. lessonii lessonii (triangles), P. lessonii ugartei (diamonds), P. lessonii mandibularis (circles), and P. lessonii elongatus (squares).
	Distribution of P. lessonii marginipennis.

Distribution:

Lesson's stag beetle is distributed along the Andes in central Chile. There are 5 recognized subspecies. One subspecies, P. lessonii marndibularis, is extremely variable in elytral pattern.

Taxonomy:

Paulsen, M.J. 2010. The stag beetles of southern South America (Coleoptera: Lucanidae). Bulletin of University of Nebraska State Museum 24: 1-148. Available here.