Eriococcidae, Cockerell, 1899

Tanaka, Hirotaka & Kamitani, Satoshi, 2023, Two new species of Eriococcidae (Hemiptera: Coccomorpha) in Japan, Zootaxa 5244 (4), pp. 387-395 : 393-394

Key to adult females of the family Eriococcidae found in Japan

(adapted and modified from Kawai 1980 and Kozár et al. 2013)

1(0) Dorsum without macrotubular ducts, but with large invaginated 5-locular pores. Labium small, reduced, indistinctly two segmented, with basal segment absent. Metathoracic legs greatly reduced, each represented by a ball-shaped sclerotization............................................................................ Kuwanina parva ( Maskell 1897)

- Dorsum with macrotubular ducts, but without large invaginated 5-locular pores. Labium large, well developed, with basal segment present. Metathoracic legs well developed.......................................................... 2

2(1) Basal segments of labium with 0 or 1 pair of setae. Antenna 5 segmented. Dorsum with conical setae broad............................................................................... Asiacornococcus japonicus ( Kuwana 1902)

- Basal segments of labium with 2 pairs of setae. Antenna with more than 5 segments. Dorsal conical setae relatively slender, not broad.............................................................................................. 3

3(2) Dorsal macrotubular ducts present on margin only........................................................... 4

- Dorsal macrotubular ducts present over entire dorsum........................................................ 5

4(3) Dorsal setae numerous....................................................... Gossyparia spuria ( Modéer 1778)

- Dorsal setae few, scarcely present........................................ Acalyptococcus graminis ( Maskell 1897)

5(3) Enlarged conical setae quite small in medial and mediolateral areas of dorsum (each less than half as long as a marginal seta), especially on abdomen................................................. Anophococcus koguchii Tanaka sp. nov.

- Enlarged conical setae medium-sized in medial and mediolateral areas of dorsum (each about half as long as a marginal seta) ................................................................................................... 6

6(5) Microtubular ducts short. Found mostly on herbaceous plants except bamboo..................................... 7

- Microtubular ducts long. Found mostly on woody plants and bamboo.......................................... 11

7(6) Body elongate oval, with body length about 1.5x body width, always less than 2x body width. Found on Asteraceae , Cactaceae , and Fabaceae ........................................................................................ 8

- Body extremely elongate oval, with body length about 2.5x body width. Found on Poaceae ......................... 10

8(7) Metathoracic coxa much larger than prothoracic or mesothoracic coxa, wider than length of metathoracic tibia...................................................................................... Rhizococcus sojae Kuwana 1917

- Metathoracic coxa about same size as prothoracic or mesothoracic coxa, narrower than length of metathoracic tibia....... 9

9(8) Conical setae of medial area of posterior abdominal segments quite small................. R. coccineus ( Cockerell 1894)

- Conical setae of medial area of posterior abdominal segments well developed and as large as marginal enlarged conical setae............................................................................... R. henmii ( Kuwana 1931)

10(7) Dorsal surface of each anal lobe with 4 enlarged conical setae........................... R. miscanthi Takahashi 1957

- Dorsal surface of each anal lobe with 3 enlarged conical setae........................... R. festucae ( Lindinger 1932)

11(6) Dorsum with enlarged conical setae blunt or truncate....................................................... 12

- Dorsum with enlarged conical setae sharply pointed........................................................ 14

12(11) Dorsum of abdominal segments with conical setae small and scarce............. Acanthococcus torikurai Tanaka sp. nov.

- Dorsum of abdominal segments with conical setae not small or scarce.......................................... 13

13(12) Thoracic submargin of venter with macrotubular ducts................................. Ac. tokaedae ( Kuwana 1932)

- Thoracic submargin of venter without macrotubular ducts...................... Ac. chabohiba (Kuwana & Nitobe 1918)

14(11) Inner margin of anal lobe with some granule-like sclerotizations. Found on bamboo............................... 15

- Inner margin of anal lobe without granule-like sclerotizations. Found on woody plants............................. 16

15(14) Dorsum of abdominal segment VIII with fewer than 10 conical setae........................ Ac. onukii ( Kuwana 1902)

- Dorsum of abdominal segment VIII with more than 20 conical setae........................ Ac. azumae ( Kanda 1933)

16(14) Anal lobe with most dorsal setae all about same length................................ Ac. abeliceae ( Kuwana 1927)

- Anal lobe with dorsal setae on basal inner margin smaller than other 2 setae........... Ac. lagerstroemiae ( Kuwana 1907)