acanthococcine

Hodgson, Chris, 2020, A review of neococcid scale insects (Hemiptera: Sternorrhyncha: Coccomorpha) based on the morphology of the adult males, Zootaxa 4765 (1), pp. 1-264 : 43-44

Key to the known adult male acanthococcine eriococcids

1. Apterous or brachypterous.............................................................................. 2

- Macropterous........................................................................................ 4

2. Apterous. Antennae short, each segment much broader than long, with both fleshy and hair-like setae. Capitate setae absent. Campaniform sensilla on each trochanter in a line. Loculate pores present near each spiracle. With short fleshy setae on each tibia................................................................. Ovaticoccus adoxus (Ferris) * ( Fig. 18 )

- Brachypterous. Other characters not in this combination...................................................... 3

3. Capitate setae on antennae absent............................................. Gossyparia salicicola Borchsenius

- Capitate setae on antennae present................................................. Gossyparia spuria (Modeer)

4. Fleshy setae on legs absent............................................................................. 5

- Fleshy setae on legs present............................................................................ 8

5. Antemesopiracular setae absent. Gena with 4–6 genal setae. Abdominal segment VIII with a long pleural seta, about half as long as glandular pouch setae. Small pores present on head.............................. Gossyparia spuria (Modeer)

- Antemesopiracular setae present. Gena with 3 or fewer genal setae. Other characters not in this combination............ 6

6. Hamulohalteres absent although alar lobe present. Small pores on head absent. Penial sheath about 1.5x as long as basal width...................................................................... Ovaticoccus agavium Douglas

- Hamulohalteres present. Small pores on head present. Penial sheath more than twice as long as basal width............. 7

7. Genal setae absent. Loculate pores absent from dorsum of metathorax............... Eriochiton hoheriae Hodgson 1994

- Each gena with 2 setae. Loculate pores present in position of dorsospiracular setae..... Eriochiton armatus Brittin ( Fig. 17 )

8. Fleshy setae on legs very short, only about twice as long as broad. Glandular pouch setae each with a small capitate apex................................................................. Acanthococcus adenostomae (Ehrhorn) ( Fig. 15 )

- Fleshy setae on legs much longer, several times as long as broad. Glandular pouch setae each with a pointed or flagellate apex................................................................................................... 9

9. Antemesospiracular setae absent. Abdominal segment VIII with one long pleural seta, about half as long as shortest glandular pouch seta. Sclerotised structures associated with aedeagus complex. Penial sheath broad, less than 2x as long as basal width. Cranial apophysis trifurcate.............................. Acanthococcus melnikensis Hodgson & Trencheva ( Fig. 16 )

- Antemesospiracular setae present. Other characters not in this combination...................................... 10

10. Penial sheath about 2.5x longer than basal width. Sternite of abdominal segment VIII with a longitudinal sclerotised bar. Head without pores. Without complex sclerotised structures associated with aedeagus.......... Acanthococcus orariensis (Hoy)

- Penial sheath subequal to or less than twice as long as basal width. Sternite of abdominal segment VIII without a longitudinal sclerotised bar. Head with pores. With some complex sclerotised structures associated with aedeagus................................................................................. Uhleria (Acanthococcus) araucariae (Maskell)

Note.* Although this species ( Fig. 18 ) is currently placed in Ovaticoccus Kloet , the adult male differs from that of O. agavium in the structure of the campaniform sensilla on the trochanter, which appear to be in a line and oval to elongate (and typical of the Gondwanan group of eriococcids) rather than in a curve or triangle and roundish as in O. agavium and other acanthococcids. In addition, the antennae of adult male O. adoxus are 9 segmented, each segment much wider than long and with few hs and no caps, extremely similar to those of Pseudomontanococcus martini Kozár & Konczné Benedicty ( Fig. 36 ), whereas those of O. agavium are 10 segmented, each segment longer than wide and each with numerous hs, fs and caps, typical of the acanthococcid group ( Afifi 1968). It would appear that the placement of adoxus in Ovaticoccus warrants further study.

In addition to the two species described below, the adult male of Eriococcus melnikensis Hodgson & Trencheva is also illustrated (and described in Hodgson & Trencheva, 2008) ( Fig. 16 ).

Figures

FIGURE 15. Acanthococcus adenostomae (Ehrhorn). Macropterous male. (Eriococcidae, Acanthococcid group). Where A=cranial apophysis, D=fleshy setae and X=pores on head.

FIGURE 16. Acanthococcus melnikensis Hodgson & Trencheva. Macropterous male. (Eriococcidae, Acanthococcid group). Where A=cranial apophysis, D=fleshy seta, E=hair-like seta, M=sclerotised structures associated with genitalia and O=loculate pores.

FIGURE 17. Eriochiton armatus Brittin. Macropterous male. (Eriococcidae, Acanthococcid group). Where A=cranial apophysis and C=loculate pore.

FIGURE 18. Ovaticoccus adoxus (Ferris). Apterous adult male. (Eriococcidae, Acanthococcid group). Where C=loculate pore, D=fleshy seta and F=metacoxa and trochanter.

FIGURE 36. Pseudomontanococcus martini Kozár & Konczné Benedicty. Apterous adult male. (Eriococcidae, Gondwanan group). Where A=cranial apophysis, D=fleshy setae, E=hair-like setae, R=dermal reticulations on ocular sclerite and X=pores on head.