Argyrocosma, TURNER, 1910

Han, Hongxiang, Galsworthy, Anthony C. & Xue, Dayong, 2012, The Comibaenini of China (Geometridae: Geometrinae), with a review of the tribe, Zoological Journal of the Linnean Society 165 (4), pp. 723-772 : 764-765

publication ID

https://doi.org/ 10.1111/j.1096-3642.2012.00826.x

persistent identifier

https://treatment.plazi.org/id/0389DF41-FFBF-A929-FEB8-AAD5FBECFC1D

treatment provided by

Marcus

scientific name

Argyrocosma
status

 

ARGYROCOSMA TURNER, 1910 View in CoL

Argyrocosma Turner, 1910: 562 View in CoL (key), 609. Type species: Euchloris argosticta Turner, 1904 View in CoL , by original designation. Australia: Queensland, Townsville.

Adults: Antenna of male bipectinate; outer rami longer than inner rami; filiform in female. Frons smooth-scaled. Labial palpus with the third segment in female elongate. Hind tibia of male dilated, with hair-pencil and terminal extension, with two pairs of spurs in both male and female.

Wing shape and pattern. Outer margin of forewing slightly curved, smooth; apex and outer margin of hindwing round. Wings green. Forewing with costa white, bordered with red or brown; antemedial and postmedial lines usually composed of white dots on veins, bordered with red or not; terminal line also composed of similar white dots on veins; sometimes transverse lines indistinct, wings scattered with white dots ( Argyrocosma argosticta , Argyrocosma phrixopa ). Hindwing with terminal line similar to that of forewing. Discal spot on both wings present or not. Underside paler than upperside; occasionally discal spot present; other streaks absent.

Third sternite of male abdomen with a pair of setal patches; eighth segment with posterior margin protruding and concave at middle ( A. phrixopa ), tergite concave and sternite flat in Argyrocosma inductaria .

Male genitalia. Uncus bifid terminally. Socii similar to uncus. Gnathos obsolete. Valva with costa strongly sclerotized, with tooth, small spines, or serrate. Transtilla membranous. Vinculum broadly bifurcate. Coremata very weak. Aedeagus quite small and thin, sclerotized terminally, spinose posteriorly, or spinose and expanded at middle; coecum penis long and narrow.

Female genitalia. Apophyses anteriores and posteriores slender. Ductus bursae long and slender or very short. Corpus bursae small; signum absent.

Diagnosis: The genus Argyrocosma is close to Chlorochromodes in wing pattern in that the antemedial and postmedial lines (particularly the postmedial line) are composed of small dots on veins. However, in the male genitalia, the vinculum of Argyrocosma is more widely concave than that of Chlorochromodes . The aedeagi of A. inductaria and Argyrocosma consobrina are medially expanded and spinose, differing in this respect from most other genera in the tribe Comibaenini , and similar only to Comibaena nigromacularia .

Biological notes: Holloway (1996) stated that the larva of A. inductaria lives in the flowers of the host plant ( Anacardiaceae : Buchanania ); its body is light, dull, fawnish green, suffused darker dorsally and laterally, and with a subdorsal white line; the larva is rugose with many small conical spines; subdorsal and dorsolateral tubercles are present on each segment; the spiracles are small but prominent, reddish-brown; the pupa is in a light cocoon that contains detritus, usually amongst the flower panicles.

Distribution: Oriental region and Australian tropical area.

ARGYROCOSMA INDUCTARIA ( GUENÉE, 1858) View in CoL

( FIGS 50 View Figures 27–54 , 103 View Figures 103–107 , 151 View Figures 132–155 , 206 View Figures 200–210 )

Phodoresma inductaria Guenée, 1858: 370 . Holotype ♀, Borneo : Sarawak. (BMNH)

Eucrostis smaragdus Hampson, 1891: 28 View in CoL , 110, pl. 151, figure 15. Syntype (s) ♂, India: Nilgiri district , north slopes. (BMNH)

Comibaena inductaria: Inoue, 1992: 121 .

Argyrocosma inductaria: Holloway, 1996: 247 View in CoL , figures 253, 264, pl. 8.

Diagnosis: This species is almost identical to Argyrocosma consobrina (Borneo, Java, and Australia) in wing pattern, with the antemedial and postmedial lines composed of three white, red-bordered dots. In the male genitalia, the space between the two protrusions of the vinculum is much wider in A. inductaria ; the aedeagus is also more expanded at the centre in A. inductaria . In the female genitalia, the antrum is bell-mouthed and slightly sclerotized; the lamella antevaginalis is quadrate, far from the ostium; the ductus bursae is slender; and the corpus bursae is very weak.

Type material examined: Indonesia: holotype, ♀ , Sarawak, Ex. Musaeo, Ach. Guenée, Ex. Oberthür Coll. Brit. Mus. 1927-3 ( BMNH); 1♂, one syntype of Eucrostis smaragdus, Nilgiris , north slopes, 3500 ft, Hampson Coll. 89–129, BMNH slide no. 8616 ( BMNH) .

Additional material examined: China: 8♂ 8♀, southern China, March , May to July, November ( IZCAS) ; Sri Lanka: 1♂ ( BMNH) ; Malaysia: 1♂ , Sarawak, September ( BMNH) .

Distribution: China ( Taiwan, Hainan, Yunnan), India, Nepal, Myanmar, Sri Lanka, Philippines, Malaysia, Indonesia.

Remarks: Holloway (1996) stated that A. inductaria differs from A. consobrina in the costal ornamentation of the male valve, which consists of a single, rather distal, basally directed spine in A. inductaria , whereas in A. consobrina there are up to three spines that are more centrally placed, and dorsally directed. The specimens from Hainan [IZCAS slide no. Geom- 00488 and 1055 ( Fig. 103 View Figures 103–107 )] have more developed costal ornamentation than the Bornean population ( Holloway, 1996: fig. 253), but nevertheless still less developed than in A. consobrina ( Holloway, 1996: fig. 252). It seems therefore that the costal ornamentation in A. inductaria is variable between different populations.

Species not occurring in China

Argyrocosma argosticta ( Turner, 1904) View in CoL [specimen(s)]

Euchloris argosticta Turner, 1904: 220 View in CoL . ( Australia: Queensland)

Argyrocosma consobrina ( Warren, 1897a) View in CoL [specimen(s); male genitalia photograph, Holloway (1996: fig. 252)]

Comostolodes consobrina Warren, 1897a: 210 View in CoL . ( Australia: Queensland)

Argyrocosma phrixopa ( Meyrick, 1897) View in CoL [specimen(s); male genitalia]

Thalassodes phrixopa Meyrick, 1897: 73 View in CoL . (Lesser Sunda Islands)

Prasinocyma albipunctata Warren, 1897b: 390 View in CoL . (Lesser Sunda Islands)

Argyrocosma strepens Prout, 1932a View in CoL [specimen(s); male genitalia, female genitalia photograph, Holloway (1996: fig. 260)]

Argyrocosma phrixopa strepens Prout, 1932a: 46 View in CoL , pl. 11, figure 7. (Borneo)

IZCAS

Institute of Zoology, Chinese Academy of Sciences

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Lepidoptera

Family

Geometridae

Loc

Argyrocosma

Han, Hongxiang, Galsworthy, Anthony C. & Xue, Dayong 2012
2012
Loc

Argyrocosma inductaria: Holloway, 1996: 247

Holloway JD 1996: 247
1996
Loc

Comibaena inductaria:

Inoue H 1992: 121
1992
Loc

Argyrocosma phrixopa strepens

Prout LB 1932: 46
1932
Loc

Argyrocosma Turner, 1910: 562

Turner AJ 1910: 562
1910
Loc

Euchloris argosticta

Turner AJ 1904: 220
1904
Loc

Comostolodes consobrina

Warren W 1897: 210
1897
Loc

Thalassodes phrixopa

Meyrick E 1897: 73
1897
Loc

Prasinocyma albipunctata

Warren W 1897: 390
1897
Loc

Eucrostis smaragdus

Hampson GF 1891: 28
1891
Loc

Phodoresma inductaria Guenée, 1858: 370

Guenee A 1858: 370
1858
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