Listroderina LeConte, 1876

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 : 41-42

Subtribe Listroderina LeConte, 1876

Type genus.

Listroderes Schönherr, 1826.

Diagnosis.

Rostrum relatively stout, medium-sized, shorter than pronotum; scrobes short, ill-defined, broad; funicular segmen 1 longer than 2; elytra usually oblong-oval (subrectangular in Lamiarhinus and Philippius ), with intervals convex and with anteapical tubercle (except for Rupanius ).

Included taxa.

This subtribe, representing the listroderines in the strictest sense, includes the genera Acroriellus , Acrorius , Acrostomus , Antarctobius , Germainiellus , Hyperoides , Lamiarhinus , Listroderes , Methypora , Philippius , Rupanius and Trachodema . In a previous analysis restricted to American taxa ( Morrone 1997a) most of these genera were placed as a grade basal to other listroderines. Methypora is distributed in Australia; and the remaining genera are South American: Listroderes is widely ranged in the Andean and Neotropical regions, and the other genera are found in the Andean region and the South American Transition Zone (sensu Morrone 2006).

Key to the genera of Listroderina

1	Elytral disc slightly convex to flat	2
-	Elytral disc convex	6
2	Elytra oblong-oval ( Fig. 10 )	3
-	Elytra subrectangular ( Fig. 9 )	4
3	Vestiture of seta-like scales and setae; scape medium-sized (reaching eye when resting in scrobe)	Acrorius ( Fig. 29 )
-	Vestiture of scales with finger-like processes and setae; scape long (surpassing posterior margin of eye when resting in scrobe)	Trachodema
4	Pronotum transverse; elytra with carina on apical declivity, disc slightly convex, lacking anteapical tubercle	Rupanius
-	Pronotum subcircular or subcylindrical; elytra lacking carina on apical declivity, disc flat, with anteapical tubercle	5
5	Large (17.5-22.8 mm); mandibles with 3-4 setae; pronotum subcircular, wider than elytra, with tubercles; scutellum not visible; elytra fused along interelytral suture, with series of declivital tubercles; female elytral apex not produced; tibiae lacking spurs; tarsomeres 3 subcylindrical ( Fig. 12 ); southern South America	Philippius ( Fig. 35 )
-	Small (4.0-7.0 mm); mandibles with 2 setae; pronotum subcylindrical, narrower than elytra, lacking tubercles; scutellum visible; elytra not fused along interelytral suture, lacking series of declivital tubercles; female elytral apex produced; tibiae with spurs; tarsomeres 3 bilobed ( Fig. 11 ); Australia	Methypora
6	Funicular segments 3-6 globose; pronotum lacking tubercles; elytra oblong-oval, not fused along interelytral suture	7
-	Funicular segments 3-6 elongate; pronotum with tubercles; elytra subrectangular, fused along interelytral suture	Lamiarhinus ( Fig. 33 )
7	Pronotum transverse or subquadrate; postocular lobes present	8
-	Pronotum subcircular; postocular lobes absent	Antarctobius ( Fig. 31 )
8	Integument reddish brown; epistome not raised; pronotum transverse	9
-	Integument black; epistome raised; pronotum subquadrate	Acrostomus ( Fig. 30 )
9	Vestiture of seta-like or lanceolate scales and setae; scrobal ventral tooth absent	10
-	Vestiture of subcircular scales and setae; scrobal ventral tooth usually present	Listroderes ( Fig. 34 )
10	Vestiture of seta-like scales and setae	11
-	Vestiture of lanceolate scales and setae	Hyperoides
11	Elytral interval 3 lacking series of three declivital tubercles	Germaniellus ( Fig. 32 )
-	Elytral interval 3 with series of three declivital tubercles	Acroriellus

Figures

Figures 1 - 12. Some of the characters analysed. 1 Seta-like scales 2 subcircular scales 3 lanceolate scales 4 scales with finger-like processes 5, 6, 8 face and rostrum, dorsal view 7 face and rostrum, lateral view 8, 9 elytra, dorsal view 11, 12 tarsomere 3, ventral view. 1, 5 Falklandius antarcticus; 2, 8, 11 Falklandiellus suffodens; 3 Hyperoides subcinctus; 4, 12 Philippius superbus; 6, 7, 10 Listroderes costirostris; 9 Lamiarhinus aelficus.

Figures 27 - 35. Habitus of representative Listroderini. 27 Lanteriella microphtalma 28 Telurus caudiculatus 29 Acrorius papallacta 30 Acrostomus bruchi 31 Antarctobius lacunosus 32 Germainiellus dentipennis 33 Lamiarhinus aelficus 34 Listroderes annulipes 35 Philippius superbus.