Milviscutulus Williams & Watson, 1990

Choi, Jinyeong, Soysouvanh, Pheophanh, Lee, Seunghwan & Hong, Ki-Jeong, 2018, Review of the family Coccidae (Hemiptera: Coccomorpha) in Laos, Zootaxa 4460 (1), pp. 1-62: 42

publication ID

https://doi.org/10.11646/zootaXa.4460.1.1

publication LSID

lsid:zoobank.org:pub:DB841017-698F-4D44-A633-461D350DC984

persistent identifier

http://treatment.plazi.org/id/0974884C-B65A-FFF8-FF6C-FD810714FBA6

treatment provided by

Plazi

scientific name

Milviscutulus Williams & Watson, 1990
status

 

Genus Milviscutulus Williams & Watson, 1990 

Type species: Lecanium mangiferae Green, 1889  , by original designation.

Diagnosis. Dorsum with anal plates together kite-shaped, each plate with anterolateral margin over 1.7 times as long as posterolateral margin ( Figs 37D View Figure , 38E View Figure ); dorsal setae clavate or flagellate ( Fig. 38F View Figure ); tubular ducts absent; duct tubercles present or absent ( Fig. 38D View Figure ); and preopercular pores present ( Fig. 38C View Figure ). Marginal setae with pointed or fimbriate apices ( Fig. 38M View Figure ). Stigmatic clefts small, each containing 3 stigmatic spines ( Fig. 38M View Figure ). Venter with multilocular disc-pores each with 7–10 loculi ( Fig. 38K View Figure ); ventral tubular ducts of 2 types (type I: each with a broad inner ductule; type II: each with a narrow inner ductule) ( Figs 37C View Figure , 38H View Figure ); antenna 6 to 8 segmented, usually with 7 segments ( Fig. 38P View Figure ); legs with tibio-tarsal articulatory scleroses ( Fig. 38J View Figure ) ( Williams & Watson 1990; Hodgson 1994).

Remarks. Milviscutulus  contains 4 described species, most of which are confined to Indonesia, Fiji, Papua New Guinea, Solomon Islands and Western Samoa in the Oriental and Australian regions, except for one tropicopolitan species, M. mangiferae  . The genus is similar to Protopulvinaria  , but is easily differentiated from the latter by the distribution of ventral tubular ducts which are scarce or absent on the head and prothorax; in contrast, Protopulvinaria  has abundant ventral tubular ducts in these areas ( Williams & Watson 1990; Hodgson 1994).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Coccidae