Macrolygistopterus
Creators: name: Ferreira, Vinicius S.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lycidae
Macrolygistopterus

description: Key to the species of Macrolygistopterus
1. Elytra entirely bluish black.............................................................................. 2
- Elytra with basal portion testaceous or reddish and apical third to half black or bluish black........................... 3
2. Apical portion of elytra widened; costa I subapically fused with costa IV, forming an arch subapically; costa II approximately touching the middle apex of the arch formed by costae III+IV; costa III partially obliterated after elytral apical half, fused with costa II and IV at the 4/5 elytral (Figs. 3, 29). Pronotum trapezoidal, glabrous, with anterior and lateral margins thickened, pronounced (Fig. 21).............................................................. M. caeruleus (Gorham, 1881)
- Elytra subparallel, not broadened distally; elytral costae I and II apically fused; costa III and IV fused apically (Figs. 5, 31). Pronotum rectangular, densely pubescent, with anterior and lateral margins thin (Fig. 23).......... M. grandjeani Pic, 1930
3. Pronotum black, glabrous, strongly sculptured (Fig. 19), if testaceous with a slender black stripe restricted to the middle of the median elevations. Arrangement of elytral costae: costa I subapically obliterated, costae II and IV subapically fused forming an arch; costa III apically fused with the arch formed by costae II+IV, with parallel lines between costae II and III, in some specimens parallel lines very obliterated (Figs. 1, 27)................................. M. succinctus (Latreille, 1811)
- Pronotum testaceous, scarcely pubescent, with a broad black longitudinal stripe. Arrangement of elytral costae not like above....................................................................................................4
4. Pronotum more or less pentagonal, with anterior margins rounded................................................ 5
- Pronotum more or less subtrapezoidal.....................................................................6
5. Rostrum short (Fig. 18); costa I and II apically fused, forming an arch; costa III subapically fused with the arch formed by costae I+II; costa IV following alone without touching the elytral apex (Fig. 35)........................ M. kirschi Pic, 1931
- Rostrum long (Fig.17); costae I and IV apically fused, forming an arch, with elytral 4/5 strongly obliterated; costa III obliterated at elytral 4/5; costa II reaching elytral apex, crossing the arch formed by costae I+IV, obliterated after the arch (Fig. 35)..................................................................................... .. M. simoni Pic, 1930
6. Elytral costa I reaching elytral apex, subapically obliterated; costae II and IV subapically fused, forming an arch, subapically obliterated; costa III not touching the arch formed by costae II+IV (Fig. 30). Adjacent area of scutellum black (Fig. 30)....................................................................................... M. germaini Pic, 1930
- Arrangement of elytral costae not like above. Adjacent area of scutellum of the same color of basal portion of elytra....... 7
7. Costa I and II fused subapically, apex of costa I apically obliterated; costa III subapically obliterated and fused to the outer margin of II; costa IV reaching elytral apex, with an oblique obliterated line linking costa II and IV (Fig. 32)............................................................................................. M. subparallelus Pic, 1930
- Costa I and IV not fused to any other, both free; costae II and III subapically fused, this fusion continuing into a single costa (II+III); elytral costae not reaching elytral apex. Rostrum black or testaceous..................................... 8
8. Rostrum testaceous; apical region of ventrite VII of females notched, forming two acuminated apices (Fig. 40); antennomere IV subequal to III in width; elytral costae slightly distinct (Figs. 8, 33)...................... M.testaceirostris Pic, 1930
- Rostrum black; apical region of ventrite VII of females notched, forming two rounded apices (Fig. 37); antennomere IV distinctly wider than the others; elytral costa distinctly visible (Figs. 2, 28)................ M. quadricostatus (Buquet, 1842)
description: Published as part of Ferreira, Vinicius S., 2016, A revision of the genus Macrolygistopterus Pic, 1929 (Coleoptera, Lycidae, Calochromini), pp. 321-338 in Zootaxa 4105 (4) on page 335, DOI: 10.11646/zootaxa.4105.4.2, http://zenodo.org/record/271306