Zizula hylax

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Tiny grass blue
Tiny Grass Blue Zizula hylax by kadavoor.JPG
In Kerala, India
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Lycaenidae
Genus: Zizula
Species:
Z. hylax
Binomial name
Zizula hylax
(Fabricius, 1775)
Synonyms
  • Papilio hylaxFabricius, 1775
  • Lycaena gaikaTrimen, 1862
  • Lycaena mylicaGuenée, 1863
  • Lycaena cleodoraWalker, 1870
  • Lycaena perparvaSaalmüller, 1884

Zizula hylax, 'the Tiny grass blue' [1] [2] is a species of blue butterfly.

Contents

Description

Male upperside: dull violet blue, which changes to a brighter tint of violet in certain lights. Forewing: the costa very narrowly, the termen much more broadly dull brown; this edging to the termen in most specimens decreases in width from apex to tornus, and is outwardly followed by an anteciliary darker brown line. Cilia brownish anteriorly, posteriorly brownish at the base with the apical portions white. Hindwing: the ground colour brighter than on the forewing, the costal and terminal margins much more narrowly edged with brown, which edging is merged in the anteciliary dark brown line. Cilia: brown along their basal halves, white apically. [3]

Underside: grey. Forewing: a dusky brown lunular line on the discocellulars; two subcostal spots above the cell, one on either side of the discocellular lunule; a very strongly curved discal series of five spots, of which the posterior three are somewhat lunular in shape and placed obliquely en echelon, the next above these hook shaped, the anterior spot round; both the subcostal spots and the spots of the discal series are black, each narrowly encircled with white; beyond these are inner and outer subterminal dusky lines, which anteriorly are continuous, posteriorly somewhat broken and macular, followed by a very conspicuous jet-black anteciliary slender line. Cilia greyish white, traversed by a medial transverse blackish-brown line. Hindwing: with the following small white-encircled black spots: a subbasal transverse series of three, followed by a highly curved series of eight spots, that curve across the disc of the wing to the costa and along the latter towards the base; discocellulars with a dusky short lunular line as on the forewing; terminal markings and cilia similar, but the outer and broader subterminal line more broken and macular than on the forewing. Antennae black, the shafts ringed with white; head, thorax and abdomen dark brown, with a little violet pubescence on the head and thorax; beneath: palpi, thorax and abdomen greyish white. [3]

Female upperside: glossy brown, without any violet tint whatever; the anteciliary darker brown lines on both forewings and hindwings well marked. Underside: very similar to that of the male, the ground colour a shade darker, the markings slightly larger and more prominent. Antenna, head, thorax and abdomen as in the male, but the latter three without a trace of violet or blue on the upperside. [3] [4]

Distribution

The tiny grass blue is found in several races throughout tropical and subtropical Africa, Asia, and Oceania, including India, [1] Japan, the Philippines, Singapore, Swaziland, north and east coasts of Australia and also in southern Australia. [2]

Life history

The wingspan of the adults is about 1.5 centimetres (0.59 in). The eggs are pale green, round, and flattened, with a diameter of about 0.5 millimetres (0.020 in). They are laid singly on buds and flowers of a food plant. The caterpillars are 0.7 centimetres (0.28 in) long, green with a dark red line along the back, and light and dark lines partway along the sides. The sides are hairy, and the head is pale brown. The pupa is 0.7 cm long, hairy and green, and is attached to a stem or the underside of a leaf of a food plant. [3]

Size comparison. The next largest of this group of average-sized blues is pontis, wingspan around 2.5 cm (1.0 in). From Seitz as synonym Lycaena gaika Gaika04.jpg
Size comparison. The next largest of this group of average-sized blues is pontis, wingspan around 2.5 cm (1.0 in). From Seitz as synonym Lycaena gaika

Food plants

Food plants include various members of the family Acanthaceae. Species noted include Hygrophila auriculata and Phaulopsis dorsiflora . [5]

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References

  1. 1 2 Varshney, R.K.; Smetacek, Peter (2015). A Synoptic Catalogue of the Butterflies of India. New Delhi: Butterfly Research Centre, Bhimtal & Indinov Publishing. p. 135. doi:10.13140/RG.2.1.3966.2164. ISBN   978-81-929826-4-9.
  2. 1 2 Savela, Markku. "Zizula hylax (Fabricius, 1775)". Lepidoptera and Some Other Life Forms. Retrieved July 3, 2018.
  3. 1 2 3 4 PD-icon.svg One or more of the preceding sentences incorporates text from a work now in the public domain : Bingham, C.T. (1907). The Fauna of British India, Including Ceylon and Burma. II (1st ed.). London: Taylor and Francis, Ltd. pp. 308–309.
  4. PD-icon.svg One or more of the preceding sentences incorporates text from a work now in the public domain : Swinhoe, Charles (1905–1910). Lepidoptera Indica. Vol. VII. London: Lovell Reeve and Co. pp. 232–233.
  5. Kunte, K. 2006. Additions to the known larval host plants of Indian butterflies. Journal of the Bombay Natural History Society 103(1):119–121

Further reading