Valid Names Results

Coccus penangensis Morrison, 1921 (Coccidae: Coccus)

Nomenclatural History

• Coccus penangensis Morrison 1921: 657. Type data: MALAYSIA: Penang Island, in hollow stems of Macaranga triloba.. Syntypes, female and first instar, Type depository: Washington: United States National Entomological Collection, U.S. National Museum of Natural History, District of Columbia, USA; accepted valid name

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Associates:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• GullanKoFi2018: pp.12 ( Adult (F) ) [Coccus species associated with Macaranga]
• Tang1991: pp.76 ( Adult (F) ) [China]

Remarks

• Systematics: urn:lsid:zoobank.org:act:D8A35CBE-4EB3-4492-9C2C-38AD45B77D04 Subfamily: Coccinae A, Coccini (Choi & Lee, 2019) It seems that this species originally was to be named "Lecanium inquilinum" by Green as this name is crossed out on the type slide labels and replaced by "Coccus penangensis". The slide envelope for the holotype also includes the words: "Green, ms: (Part of type material)". (Gullan, et al., 2018) Adult females of C. penangensis can be distinguished from all other species of Coccus known from Macaranga by having the combination of (i) anal plates each with 11–23 setae, each seta ≤20 μm long; (ii) short, slender dorsal setae, each mostly ≤20 μm long and tapering to apex; and (iii) marginal setae in a single row with apex of each seta usually bifurcate or fimbriate, and mostly 7–20 μm long. The adult females of C.penangensis are most similar to those of C. heckrothi in the number of dorsal setae on each anal plate (although the setae of C. heckrothi are often slightly longer) and in the shape and length of the dorsal body setae, but differ in that the marginal setae of C. penangensis mostly have bifurcate or fimbriate apices (mostly with sharply pointed apices in C. heckrothi) and the lateral stigmatic setae are usually <15 μm long (mostly >15 μm in C. heckrothi). (Gullan, et al., 2018)
• Structure: “Normally short oval, flat, dorsal surface dull, naked, wrinkled radially near margin, outer portion light brown, central disk usually much darker brown to blackish; ..” (Morrison 1921 657). Morrison’s description of adult females from Penang Island differs in body colour from specimens photographed in Borneo,probably because Morrison’s specimens were dead and dried. Females from both Brunei and Sabah were pale ochre to salmon pink with a thin dorsal secretion that varied in whiteness among females from different collections. Ridges radiating inwards from the body margin were apparent in all specimens. Slide-mounted adult female body oval to elongate oval, 1.6–3.0 mm long, 1.2–2.5 mm wide. (Gullan, et al., 2018)
• Biology: Occupies the hollow stems of myrmecophytic species of Macaranga (Euphorbiaceae) in association with ants of the genus Crematogaster (Heckroth et al., 1998)
• General Remarks: Description and illustration of the adult female given by Morrison (1921). Redescription and illustration in Gullan, et al., 2018,

Illustrations

Citations