Key to Malagidris males

This male key is provisional, based on: Bolton, B. & Fisher, B.L. 2014. The Madagascan endemic myrmicine ants related to Eutetramorium (Hymenoptera: Formicidae): taxonomy of the genera Eutetramorium Emery, Malagidris nom. n., Myrmisaraka gen. n., Royidris gen. n., and Vitsika gen. n. Zootaxa 3791:1–99. doi:10.11646/zootaxa.3791.1.1

You may also be interested in


 * Malagidris
 * Key to Eutetramorium group genera

1

 * With petiole in dorsal view the peduncle with a pair of laterally projecting tubercles, upon which the spiracles are borne; width across the tubercles is distinctly greater than the maximum width across the node . . . . . 2


 * With petiole in dorsal view the peduncle with a slight convexity at the site of the spiracles, without tubercles; width across the convexity is less than the maximum width across the node . . . . . 3

2
return to couplet #1
 * Postpetiole in dorsal view and in profile longer and more slender, length/width ca 1.90 or more, length/height > 2.00. Head longer and narrower, CI < 80. Larger species, HW > 0.80, MfL > 1.80 . . . . . Malagidris jugum


 * Postpetiole in dorsal view and in profile shorter and more stout, length/width ca 1.25, length/height ca 1.43. Head shorter and broader, CI 84. Smaller species, HW 0.72, MfL ca 1.10 . . . . . . . . . . . . . . . . . . . . unassociated male (discussed under jugum)

3
return to couplet #1
 * With head in profile the posterodorsal outline, behind the ocelli, vertical or very nearly vertical. Head relatively broader, CI 80–84 . . . . . 4


 * With head in profile the posterodorsal outline, behind the ocelli, conspicuously sloped to the posterior margin, not vertical. Head relatively narrower, CI 67–74 . . . . . 5

4
return to couplet #3
 * With head in profile the vertical posterior surface terminates ventrobasally in a posteriorly projecting lobe, which has the occipital carina at its apex. Eye relatively slightly larger, EL/HW 0.58–0.61 . . . . . Malagidris belti


 * With head in profile the vertical posterior surface descends directly to the occipital carina, without a posteriorly projecting lobe. Eye relatively slightly smaller, EL/HW 0.50 . . . . . Malagidris dulcis (putative)

5
return to couplet #3
 * Scape relatively short, SI 45–48. First funicular segment of antenna relatively long, length of first segment/length of second segment 0.38–0.40. Smaller species, HW < 0.70, MfL < 1.50, maximum width of mesoscutum < 0.75 . . . . . Malagidris alperti


 * Scape relatively long, SI 77–79. First funicular segment of antenna relatively very short, length of first segment/length of second segment 0.23–0.26. Larger species, HW > 0.70, MfL > 1.90, maximum width of mesoscutum > 0.85 . . . . . Malagidris sofina