Diomini

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 (Pi, Zootaxa 4554 (1), pp. 255-285: 262

publication ID

https://doi.org/10.11646/zootaxa.4554.1.9

publication LSID

lsid:zoobank.org:pub:A804E949-109A-468D-B58B-CF7C8BCB3059

persistent identifier

http://treatment.plazi.org/id/DF18F971-FFC5-0B2C-FF4B-FD4D69C8BA09

treatment provided by

Plazi

scientific name

Diomini
status

 

Key to World genera of Diomini  sens. nov.

(excluding Erratodiomus  and Magnodiomus  ( Hyperaspidini  ) ( Figs. 1–2View FIGURES 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. 5View FIGURES 3–12) with sperm duct generally long, convoluted; spermatheca vermiform throughout, lacking bulbous basal chamber. Male genitalia ( Fig. 7View FIGURES 3–12) 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, 11–12View FIGURES 3–12) with long slender inner arm that may be strongly procurved ( Fig. 12View FIGURES 3–12); outer arm truncated or obliterated ( Fig. 11View FIGURES 3–12), leaving large oval orifice to mark its place; some species with fragment of outer arm present but not enclosing ejaculatory duct ( Fig. 12View FIGURES 3–12). Predators on Sternorrhyncha  ( Pseudococcidae  , Coccidae  , Diaspididae  , Monophlebidae  , Ortheziidae  ). Larvae free-living......... Decadiomus Chapin 

3’. Female genitalia ( Fig. 6View FIGURES 3–12) with sperm duct of moderate length, may be weakly sinuous; spermatheca with bulbous basal chamber. Male genitalia ( Figs. 8View FIGURES 3–12, 29–32View FIGURES 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. 10View FIGURES 3–12) 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. 40–42View FIGURES 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,bView FIGURES 1–2) 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. 6View FIGURES 3–12). Restricted to the New World........................................ Heterodiomus Brèthes 

6.’ Without the above combination of characters. Distributed world wide................................ Diomus Mulsant