Bagoini

ROBERTO CALDARA, CHARLES W. O’BRIEN & MASSIMO MEREGALLI, 2017, A phylogenetic analysis of the aquatic weevil tribe Bagoini (Coleoptera: Curculionidae) based on morphological characters of adults, Zootaxa 4287 (1), pp. 1-63 : 49-50

publication ID	https://doi.org/ 10.11646/zootaxa.4287.1.1
publication LSID	lsid:zoobank.org:pub:13C4F702-EF00-4F04-B38E-3F0AA6CAF718
DOI	https://doi.org/10.5281/zenodo.4386736
persistent identifier	https://treatment.plazi.org/id/D1778785-4F4D-1F3B-0DD7-69001282FBAD
treatment provided by	Plazi
scientific name	Bagoini
status

Treatment

Key to the genera and subgenera of Bagoini

1. Scrobe not reaching eye and squamose ( Fig. 1 View FIGURE 1 A). Prosternum without rostral canal and without transverse ridge at its base ( Fig. 3 View FIGURE 3 A)......................................................................... Hydronomus Schoenherr View in CoL

- Scrobe reaching eye and glabrous ( Figs 1 View FIGURE 1 B–D). Prosternum with weak ( Fig. 3 View FIGURE 3 B) to deep rostral canal ( Fig. 3 View FIGURE 3 C); if rostral canal lacking then prosternum with transverse ridge at base ( Fig. 3 View FIGURE 3 D).................................................2

2. Rostrum in lateral view strongly curved ( Fig. 1 View FIGURE 1 B); apex of rostrum with a lateral plica ( Fig. 1 View FIGURE 1 F); basal 2/3 of lateral margin of rostrum (close to ventral margin) with a row of sparse, regularly distributed setae ( Fig. 1 View FIGURE 1 F). Apodemes of spiculum ventrale fully bifurcate, arising laterally on plate of sternite, apparently forming two straight rods with arms ( Fig. 8 View FIGURE 8 F).................................................................................. Memptorrhynchus Iablokoff-Khnzorian View in CoL

- Rostrum in lateral view moderately curved to almost straight; apex of rostrum without a lateral plica; basal 2/3 of lateral margin of rostrum with sparse and irregularly distributed setae. Apodemes of spiculum ventrale not bifurcate ( Figs 8 View FIGURE 8 E and 8G).3

3. Body short and broad-oval; very small in size, 2.0 mm or less in length (rostrum excluded). Pronotal disc moderately to strongly transversely convex. Postocular lobe ventrally indistinct, not raised, not forming discontinuity with anterior prosternal margin. Prosternal canal weak. Lateral margins of prosternal canal barely raised. Elytra subquadrate ( Fig. 4 View FIGURE 4 A), with posterior

declivity in lateral view strong at 75 degrees ( Fig. 4 View FIGURE 4 B); declivital callus absent on interval 5 ( Fig. 4 View FIGURE 4 A); scales of elytral intervals arranged in almost regular pairs, side by side, each interval with two, individually distinct rows of round scales; vestiture with a semicircular white stripe at posterior third ( Fig. 4 View FIGURE 4 A).................................... Azollaebagous n. gen. - Species without all these characters taken together. Postocular lobes well-developed; prosternum with deep rostral canal and with lateral margins well-developed ( Fig. 3 View FIGURE 3 C), except for B. geniculatus View in CoL group of Bagous View in CoL subgen. Macropelmus ( Fig. 3 View FIGURE 3 D)..4

4. Vestiture of odd-numbered elytral intervals generally tessellate, with alternate rectangles of dark and pale scales, or completely whitish. Elytra lacking declivital callosities. Tibiae stout, with inner margin weakly bisinuate. Outer margin of tibiae, especially on hind tibiae, straight or nearly so toward apex (in lateral view). Tarsi short, with tarsomere 3 broadly cordate to subcordate ( Fig. 2 View FIGURE 2 F). Basal sclerite complex of endophallus with two pairs of subclavate sclerites variously articulated ( Fig. 5 View FIGURE 5 C–D). In female apodemes of spiculum ventrale very broadly and arcuately divergent from base (U-shaped) ( Fig. 8 View FIGURE 8 G), and bursa with digitate sclerotized structure ( Fig. 8 View FIGURE 8 I)........................................ Bagous View in CoL subgen. Parabagous Schilsky View in CoL

- Vestiture of odd-numbered elytral intervals with different pattern. Elytra usually at least with a weak to strong callus at the declivity of interval 5 ( Figs 3 View FIGURE 3 F–G). Tibiae usually longer and with inner margin distinctly bisinuate. Outer margin of tibiae, especially on hind tibiae, more or less curved toward apex (in lateral view). Tarsi longer, rarely with tarsomere 3 subcordate. Basal sclerite complex of endophallus, if present, differently shaped. In female apodemes of spiculum ventrale not broadly and arcuately divergent from base ( Fig. 8 View FIGURE 8 E), and bursa rarely with sclerotized structure and when present not digitate.........5

5. Rostrum flattened at apex and with dorsal surface at point of antennal insertion distinctly angulate ( Fig. 1 View FIGURE 1 D). Scrobe in dorsal view visible for its entire length ( Fig. 1 View FIGURE 1 G). Forehead with tuberculate elevation along margin of eye. Pronotum long, 0.90x or more as long as broad. Elytra always elongate................................ Bagous View in CoL subgen. Hydronoplus Fairmaire View in CoL

- Rostrum regularly convex from base to apex and with dorsal surface at point of antennal insertion not angulate. Scrobe in dorsal view visible at last in its basal portion ( Fig. 1 View FIGURE 1 E). Forehead without tuberculate elevation along margin of eye. Pronotum shorter. Elytra from short to long.........................................................................6

6. Penis with apodemes long, at least half as long as body ( Figs 5 View FIGURE 5 A–H).............................................7

- Penis with apodemes short, at most one-third as long as body ( Figs 6 View FIGURE 6 B–G, 7A–I and 8A–D).................................................................................................. Bagous View in CoL subgen. Macropelmus Dejean

7. Orificial lateral sclerites of penis body not reaching anterior margin of orifice ( Figs 4 View FIGURE 4 A–B, D–E). Endophallus without subbasal pair of dense concentrations of fine elongate spicules. Base of endophallus without sacule containing elongate, curved spicules. Penis body at apex at most with short narrow lip, widest at base, thence slightly tapered at least in basal 2/3 ( Figs 5 View FIGURE 5 E– F, 5G). Tegmen with long parameroid lobes................................................. Bagous Germar View in CoL s. str.

- Orificial lateral sclerites of penis body reaching anterior margin of orifice. Endophallus with sub-basal pair of dense concentrations of fine elongate spicules (excluding B. pauxillulus View in CoL ). Base of endophallus with sacule containing elongate, curved spicules forming dark, somewhat paired masses (except B. blyxae View in CoL and B. matthewsi View in CoL ) ( Fig. 6 View FIGURE 6 A). Penis body at apex with distinct broad lip, more or less parallel-sided in basal 2/3 ( Fig. 6 View FIGURE 6 A). Tegmen with very short parameroid lobes.......................................................................................... Bagous View in CoL subgen. Hydrillaebagous n.subgen.