Valid Names Results

Platylecanium elongatum Takahashi, 1951 (Coccidae: Platylecanium)

Nomenclatural History

• Platylecanium elongatum Takahashi 1951b: 104. Type data: INDONESIA: Riau [=Riouw] Islands, Rempang, on wild palm.. Syntypes, female, Type depository: Sapporo: Entomological Institute, Faculty of Agriculture, Hokkaido University, Japan; accepted valid name

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• JoshiFi2019: pp.7 ( Adult (F) ) [Species of Platylecanium]
• Tang1991: pp.133 ( Adult (F) ) [Asia]

Remarks

• Systematics: P. elongatum resembles P. dendrobii and P. cyperi. Based on Takahashi’s description, P. elongatum differs from P. dendrobii in having: (i) short stigmatic spines, which are subequal in length and do not reach the margin (those of P. dendrobiii are much longer, with the median spine reaching the margin), and (ii) each side with possibly more marginal setae between the stigmatic clefts (about 14‒22 on P. dendrobii but only 6‒10 on P. dendrobii). Platylecanium elongatum differs from P. cyperi in lacking dorsal areolations (P. cyperi has a broad submarginal band of areolations). (Hodgson, 2025a)
• Structure: From Takahashi’s (1951) original description, the main character-states diagnosing this species are: (i) body elongate, about 2.3 times longer than wide (4.2‒4.7 mm long); (ii) dorsum without areolations; (iii) with 4‒7 preopercular pores present around some clear areas; (iv) anal plates together about as long as combined widths, each plate with a pointed apex and posterior margin slightly longer than anterior margin; (v) stigmatic clefts each with 3 stigmatic spines; (vi) stigmatic spines longer than marginal setae, each stout and tapering, but not reaching margin; (vii) stigmatic spines subequal in length or with median spine shorter than lateral spines; (viii) margin not crenulated; (ix) marginal setae sparse, setose and short, with 14‒22 on each side between stigmatic clefts, and (x) antennae rudimentary and pointed apically (Hodgson, 2025a)
• General Remarks: Good description and illustration of adult female by Takahashi (1951b). 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 w orld, but by mistake Joshi wrote it's heading as key to the species known from India. (Joshi, pers. comment)

Illustrations

Citations