Ishigakicoccus shimadai, Tanaka, Hirotaka, 2016

Tanaka, Hirotaka, 2016, A new genus and species of Rhizoecidae (Hemiptera, Sternorryncha, Coccomorpha) associated with Acropygayaeyamensis (Hymenoptera, Formicidae, Formicinae), ZooKeys 616, pp. 115-124 : 117-119

Taxon classification Animalia Hemiptera Rhizoecidae

Ishigakicoccus shimadai sp. n. Figures 1, 2, 3

Type series.

Holotype, adult female. Japan, Okinawa-pref., Ishigaki Is., Mt. Omoto, 16.II.2015. coll. T. Shimada 1♀ (NSMT-I-Ho 00073). Paratypes, same data as Holotype, 3♀ (NSMT-I-Ho 00074-76).

Slide-mounted specimens.

Body elongate oval, slightly pyriform, 721-895 µm long, 379-632 µm wide. Eye spot absent. Antennae 5 segmented, 1st: 18.4-29.5 µm long, 2nd: 13.7-18.4 µm long, 3rd: 15.8-26.3 µm long, 4th: 17.1-22.1 µm long and 5th: 36.8-41.3 µm long. The fifth segment with three fleshy setae. Anterior spiracles each 20.8-28.7 µm wide across atrium; posterior spiracles each 16.8-29.7 µm wide across atrium. Legs well developed, length of posterior pair: coxa 45.8-55.2 µm long, trochanter + femur 123-133 µm long, tibia + tarsus 112-122 µm long, claw 33.4-39.4 µm long. Ratio of lengths of tibia + tarsus to trochanter + femur 1.05-1.11. Claw digitules setose, each 3.2-6.1 µm long.

Dorsum: Two types of body setae present. Type I: relatively well developed setae, 19.7-58.9 µm long, some setae with a bent or rarely with a knobbed apex. Type II: relatively slender setose setae, 11.0-32.8 µm long, each with a pointed apex. Both types of setae distributed in transverse segmental rows. Multilocular pores each about 2.9-3.7 µm in diameter, each with 5-6 loculi, present on head and thorax, but rarely present on abdomen (Figure 3). Tritubular and bitubular pores absent. Oral collar tubular ducts absent. Ostioles absent. Anal opening 38.9-52.6 µm long and 55.2-61.8 µm wide. Anal ring irregular oval. Anal pores, and anal ring setae absent, but type I and II setae densely present around the opening.

Venter: Labium appearing 2 segmented, 100-107 µm long, 48.4-62.0 µm wide. Two types of body setae present: type I, relatively well developed setae, 18.4-65.3 µm long, some setae with a bent and a rarely knobbed apex.; type II, relatively slender setose setae, 10.5-37.4 µm long, each with a pointed apex. Both setae distributed in transverse segmental bands. Multilocular pores each about 2.9-3.7 µm in diameter, each with 5-6 loculi, frequently present and evenly distributed on all areas of venter. 3-5 locular pores, each 5.8-7.9 µm in diameter, without central hub, present on medial area of abdominal segments III–VI in transverse rows. A circulus, 10.5-18.4 µm long and 21.0-33.2µm wide present on medial anterior border of abdominal segment II. Tritubular and bitubular pores absent. Oral collar tubular ducts absent.

Etymology.

Named after the collector of the type specimens.

Host plant.

Unknown.