Valid Names Results

Platylecanium citri Takahashi, 1942 (Coccidae: Platylecanium)

Nomenclatural History

• Platylecanium citri Takahashi 1942b: 23. Type data: THAILAND: Bangkok Noi, on Citrus sp.. Syntypes, female, Type depository: Taichung: Entomology Collection, Taiwan Agricultural Research Institute, Wu-feng, Taichung, Taiwan; accepted valid name

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• JoshiFi2019: pp.7 ( Adult (F) ) [Species of Platylecanium]

Remarks

• Systematics: Platylecanium citri/ somewhat resembles P. faveolatum in having: (i) a non-crenulate margin; (ii) body less than twice as long as wide; (iii) only 3 stigmatic setae in each cleft; (iv) anal plates together longer than wide, and (v) very short antennae. However, based on Takahashi’s description, P. citri can be easily separated from P. faveolatum in having the anal plates each more than three times as long as the width of a single plate (only about twice as long on P. faveolatum). (Hodgson, 2025a)
• Structure: From Takahashi’s (1942) original description, the main features characterising this species appear to be: (i) body asymmetrical and 4 mm long; (ii) submarginal areolations abundant, each small and oval; (iii) antennae rudimentary (each about 40 μm long); (iv) legs absent [probably present but reduced to claws]; (v) stigmatic clefts deep, each with 3 stigmatic spines, each spine about 37 μm long, much longer than a marginal seta; (vi) margin not crenulated; (vii) marginal setae short (each about 12 μm long), setose and sparse, and (viii) anal plates each narrow and pointed, together clearly longer than wide (length about 230 μm; width of single plate about 65 μm).
• General Remarks: Platylecanium citri was originally collected at Bangkok Noi, Thailand on Citrus (Rutaceae) in March 1940 but does not appear to have been found since. (Hodgson, 2025a) The key in the paper, Joshi, S., & Firake, D.M. 2019 First record of Platylecanium nepalense Takagi (Hemiptera: Coccomorpha: Coccidae) from India, with redescription and a key to the species of Platylecanium Cockerell & Robinson, is for species of Platylecanium in the world, but by mistake Joshi wrote it's heading as key to the species known from India. (Joshi, pers. comment)

Illustrations

Citations

• Ali1971: distribution, host, 41
• BenDov1993: catalog, 237
• Hodgso2025a: diagnosis, distribution, host, taxonomy, 159-162
• JoshiFi2019: key, 7
• Takaha1942b: description, distribution, host, illustration, taxonomy, 23-24
• Tang1991: description, distribution, host, taxonomy, 134-135