Valid Names Results

Coccidohystrix ihoujin Tanaka, 2020 (Pseudococcidae: Coccidohystrix)

Nomenclatural History

• Coccidohystrix ihoujin Tanaka 2020. Type data: JAPAN: Aichi-pref., Tokoname City, Chubu Centrair International Airport. on: Pachypodium inopinatum, 10/7/2018, by H. Irie. Holotype, female, by original designation Type depository: Matsuyama: Ehime University Museum, Matsuyama, Japan; Tsukuba: National Museum of Nature and Science, Japan; accepted valid name Illustr.

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• Tanaka2020a: pp.7-9 ( Adult (F) ) [Coccidohystrix sensu stricto]

Remarks

• Systematics: Coccidohystrix ihoujin is slightly similar to another Madagascan species, C. primigenia in having both pairs of ostioles and trilocular pores on each elevated cerarius and dorsal cerarii. However, C. ihoujin is distinguished from C. primigenia in the following character states (character states of the C. primigenia are in parenthesis); (i) only a few multilocular pores present around the vulvar opening (numerous multilocular pores present not only around the vulvar opening , but also on 2–6 abdominal segments of venter); (ii) numerous translucent pores present on the back side surface of the hind tibiae (translucent pores entirely absent on any segment of legs); (iii) weakly sclerotized dorsal cerarii (dorsal cerarii are stlongly sclerotized ); (iv) lacking multilocular pores on the dorsum and oral collar tubular ducts in the medial area of the abdominal segments of venter (a few multilocular pores present on marginal area of dorsum and oral collar tubular ducts present on medial area of abdominal segments of venter); (v) anal lobe marginal cerarii are bearing 7–9 rather narrow conical setae and penultimate marginal cerarii are bearing 2–3 rather narrow conical setae (anal lobe marginal cerarii are bearing ca.3 rather stout conical setae and penultimate cerarii are bearing ca.9 rather stout conical setae); (vi) submarginal dorsal cerarii are bearing 1–5 (mostly 1–2) rather narrow conical setae (submarginal dorsal cerarii are bearing 2–8 (mostly over 4) rather stout conical setae). It is known that the number of circuli, distribution of multilocular pores and tubular ducts, and present or absent of translucent pores on leg segments are sometimes showing considerable individual variations, therefore character states as morphological differences based on these character states mentioned above might not be used to distinguish between C. ihoujin. and C. primigenia. However, the shape of cerarian setae and the setal composition on particular cerarii are considered as rather stable diagnostic morphological character states in the mealybugs’ taxonomy and these character states (character state (v) and (vi) in above lines) can be used as more reliable morphological differences between the two species
• Structure: Adult female. Body elongate oval. Antennae nine segmented. Circulus highly elongate oval, situated between abdominal segments III and IV. Legs well developed; numerous translucent pores present on back side surface of hind tibiae. Both pairs of ostioles present and well developed. (Tanaka, 2020)
• General Remarks: Detailed description and illustration in Tanaka, 2020.

Illustrations

Citations