Geochus rugulosus, Broun, 1885

Leschen, Richard A. B., Davis, Steven, Brown, Samuel D. J., Brav-Cubitt, Talia & Buckley, Thomas R., 2022, The Enigmatic Dead-Leaf Miner Geochus Broun (Coleoptera: Curculionidae): Phylogenetic Placement, a New Species, and Lectotype Designations, The Coleopterists Bulletin 76 (1), pp. 1-35 : 30

GeOchUs rUgUlOsUs Broun, 1885 ( Figs. 5F , 6A , 15 , 17 )

Geochus rugulosus Broun 1885: 386 . Type locality: Mokohinau Island .

Type Depository. BMNH : LT, 1 PLT.

Distribution. New Zealand (ND).

Remarks. Broun did not indicate the number of specimens he examined for naming this species. Among the specimens in the Broun collection (BMNH), two were not labeled as variants and were considered syntypical. A single variant in Paris (MHNP) was not considered a part of the syntype series. We designate one of the BMNH specimens as the lectotype to stabilize the epithet, with the other becoming a paralectotype.

This species has the most setose pronotum of any species of Geochus described to date, and has rounded elytra with convex interstriae.

Type Material Examined. Lectotype, here designated ( BMNH): card-mounted, “1672. [in Broun’s hand]// New Zealand. [red underline] Broun Coll. Brit. Mus. 1922-482.//Mokohinau Is// Geochus rugulosus [in Broun’s hand]” . Paralectotype: 1 ( BMNH), same but mounted dorsally, lacking the locality label, and “rugulosus [in Broun’s hand]” .

Figures

Fig. 5. SEM images. A) Geochus inaequalis, protarsus, the arrow indicating absence of pretarsal claw (ventral aspect). G. rufipictus: B) Head (dorso-anterior aspect), C) Enlargement of frons and dorsal surface of rostrum, D) Mesonotum, E) Left elytron. F) G. rugulosus, mesonotum.

Fig. 6. SEM images. A) Geochus rugulosus, left elytron. G. sulcatus: B) Mesonotum, C) Right elytron, D) Enlargement of elytron, showing canal openings of wax glands (arrows). G. tibialis: E) Head (dorso-anterior aspect), F) Enlargement of frons and dorsal surface of rostrum.

Fig. 15. Elytral outlines for representatives of each of the Geochus species groups.

Fig. 17. Dorsal habitus photographs of representatives of the type series or holotypes of Geochus arranged into informal groups.