Diomini Gordon 1999
Creators: name: Vandenberg, Natalia J.
name: Hanson, Paul E.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Coccinellidae

description: Key to World genera of Diomini sens. nov.
(excluding Erratodiomus and Magnodiomus (Hyperaspidini) (Figs. 1–2))
1. Antenna with 10 antennomeres........................................................................... 2
1’. Antenna with 11 antennomeres........................................................................... 4
2. Species restricted to the New World....................................................................... 3
2’. Species occurring outside the New World............................................... Diomus Mulsant, in part
3. Female genitalia (Fig. 5) with sperm duct generally long, convoluted; spermatheca vermiform throughout, lacking bulbous basal chamber. Male genitalia (Fig. 7) with main tube of penis completing half to three-quarters turn or more within basal ½, somewhat spiraliform; penis bearing long or short apical flagellum; penis capsule (Figs. 7, 11–12) with long slender inner arm that may be strongly procurved (Fig. 12); outer arm truncated or obliterated (Fig. 11), leaving large oval orifice to mark its place; some species with fragment of outer arm present but not enclosing ejaculatory duct (Fig. 12). Predators on Sternorrhyncha (Pseudococcidae, Coccidae, Diaspididae, Monophlebidae, Ortheziidae). Larvae free-living......... Decadiomus Chapin
3’. Female genitalia (Fig. 6) with sperm duct of moderate length, may be weakly sinuous; spermatheca with bulbous basal chamber. Male genitalia (Figs. 8, 29–32) with main tube of penis completing half turn within basal ½, forming fishhook shape; penis lacking apical flagellum; inner and outer arms of penis capsule (Fig. 10) equally well developed, broadly consolidated into fanlike shape with sinuous distal margin; ejaculatory duct enters penis capsule through small opening in outer angle of capsule. Parasites of Piper plants that feed on food bodies. Larvae develop in silken tents constructed between leaf veins (Figs. 40–42).................................................................................. Moiradiomus gen. nov.
4. Length of terminal antennomere approximately equal to twice width, longer than basal 3 antennomeres combined................................................................................................. Andrzej Ślipiński
4.’ Length of terminal antennomere (Figs. 1a,b) less than twice width (except in Diomus sedani), much shorter than basal 3 antennomeres combined..................................................................................... 5
5. Pronotum with sharp submarginal carinae separating the anterolateral pronotal angles from the disc. Australia ..................................................................................................... Dichaina Weise
5.’ Pronotum without submarginal carinae..................................................................... 6
6. Prosternum T-shaped, long anterior to coxal cavities (subequal to length of cavity), with short carinae not extending to apex. Female genitalia with bulbous base to spermatheca, with distally tapered sclerotized sheath in basal half of sperm duct (similar to Moiradiomus; Fig. 6). Restricted to the New World........................................ Heterodiomus Brèthes
6.’ Without the above combination of characters. Distributed world wide................................ Diomus Mulsant
description: Published as part of Vandenberg, Natalia J. & Hanson, Paul E., 2019, Overview of the lady beetle tribe Diomini (Coleoptera: Coccinellidae) and description of a new phytophagous, silk-spinning genus from Costa Rica that induces food bodies on leaves of Piper (Piperaceae), pp. 255-285 in Zootaxa 4554 (1) on page 262, DOI: 10.11646/zootaxa.4554.1.9, http://zenodo.org/record/2623565