Macrostyphlina, Morrone, 2013

Morrone, Juan J., 2013, The subtribes and genera of the tribe Listroderini (Coleoptera, Curculionidae, Cyclominae): Phylogenetic analysis with systematic and biogeographical accounts, ZooKeys 273, pp. 15-71 : 21

Macrostyphlina subtr. n.

Type genus.

Macrostyphlus Kirsch, 1889.

Diagnosis.

Scrobes long, deep, sharply bordered, reaching eyes, with suprascrobal keel; elytra oblong-oval, with intervals usually flat, lacking anteapical tubercle.

Included taxa.

This new subtribe, which basically corresponds to the Macrostyphlus generic group of Morrone (1994c, 1997a), includes the genera Adioristidius , Amathynetoides , Andesianellus , Macrostyphlus , Nacodius and Puranius . All these genera are distributed in South America, in the Andean region and the South American Transition Zone (sensu Morrone 2006).

Key to the genera of Macrostyphlina

1	Postocular lobes present	2
-	Postocular lobes absent	4
2	Pronotum transverse to strongly transverse	Puranius ( Fig. 19 )
-	Pronotum subcircular or subcylindrical	3
3	Pronotum subcircular with subparallel flanks, disc smooth, polished; metanepisternal sutures present, complete; elytra with intervals flat	Amathynetoides
-	Pronotum subcylindrical, disc rugose; metanepisternal sutures posteriorly fused or obliterated; elytra with intervals convex	Adioristidius ( Fig. 18 )
4	Vestiture consisting of subcircular scales and setae; elytra with small, rounded tubercles	Macrostyphlus
-	Vestiture consisting of seta-like scales and setae or only setae; elytra lacking tubercles	5
5	Vestiture consisting of seta-like scales and setae; eyes large, slightly convex; pronotum disc smooth, polished; basal elytral margin not raised	Nacodius
-	Vestiture consisting of setae only; eyes very small, microphthalmic (8 or fewer facets), flat; pronotum disc rugose; basal elytral margin raised, subcarinate	Andesianellus

Figures

Figures 18 - 26. Habitus of representative Listroderini. 18 Adioristidius hirsutus 19 Puranius nigrinus 20 Haversiella albolimbata 21 Listronotus bosqi 22 Neopachytychius squamosus 23 Falklandiellus suffodens 24 Falklandiopsis magellanica 25 Falklandius antarcticus 26 Gromilus veneris.