Igerna neosa Webb, comb. nov.
Creators: name: Viraktamath, C. A.
name: Gonçalves, Ana Clara
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Igerna
Igerna neosa

description: Igerna neosa (Webb) comb. nov.
(Figs 17–18, 32, 35, 45, 59, 67, 83)
Stonasla neosa Webb 1980: 837 –838, figs 29–37. Holotype 3, Aldabra [BMNH, not examined].
Measurements. Male 3.45–3.55 mm long and 1.15–1.25 mm wide across eyes; female 3.80–3.85 mm long and 1.12–1.30 mm wide across eyes.
Head and thorax (color). Ground color ochraceous with brown markings. Crown (Fig. 18) with pair of elliptical dark brown spots equally distant between eyes and median line, and with median line bearing brown macula, all of them contiguous to facial ones. Face (Fig. 32) with conspicuous inverted brown Y-shaped macula; area adjacent to ocelli dark brown followed by brown maculae; pair of brown maculae adjacent to upper margin of compound eyes. Frontoclypeus (Fig.32) with several irregular brown maculae forming pair of lateral rows; clypellus pale brown with brown median stripe; genae ochraceous with dark brown, elongate maculae on adjacent antennal ledges; lora pale brown with inner margin dark brown. Pronotum (Figs 17–18) with five markings as follows: one brown line contiguous to coronal median macula, and attaining the pronotal posterior margin; one pair of small maculae at anterior area, and one pair of large spots at lateral area of disc, dark brown. Mesoscutum (Fig. 18), pale brown with pair of brown laterobasal triangular markings, scuto-scutellar suture dark brown; mesoscutellum pale brown. Forewings (Figs 17–18) pale brown with veins brown, and some longitudinal areas of cells paler. Legs (Fig. 17) with longitudinal pale brown to brown patches. Thoracic pleura dark brown with paler borders.
Morphology. As in I. delta.
Male genitalia. Pygofer (Fig. 35), in lateral view, with posterior margin narrowing towards bifid apex, and directed inward; in caudal view (Fig. 83) projection with crenulate dorsal margin, caudoventral margin sinuate. Styles (Fig. 45), in dorsal view, well developed, outer fork very large, subtruncate, longer than inner fork, with subapical digitiform process, bearing scattered setae; inner fork with truncate apex, bearing digitiform process directed outwards. Connective as in I. delta. Aedeagus (Figs 59, 67) with well developed dorsal apodeme 0.33 times as long as shaft in lateral view, and prominent ventral projection; shaft in ventral view, almost straight; bearing anterolateral foliaceous expansion at left side with crenulate margin; gonopore apical, on ventral margin; apex rounded. Anal tube (Fig. 35), with segment X simple, without any process; segment XI with bifid spiniform process on ventral margin.
Intraspecific variation. Some individuals have paler ground color with facial and pronotal markings darker.
Material examined. MADAGASCAR: 1 3, 2 Ƥ, Province d’Antsiranana, Parc National Montagne, d’Ambre, 1125 m, 29 January to 11 February 2001, 12o31’ 13”S, 49o10’45”E, California Acad Science, R. Harin’Hala collector, Malaise trap, MA-01-01D-04; 1 3 1 Ƥ, same data except 14–30 May 2001, MA-01-01D-11; 2 Ƥ, same data except 29 January to 11 February 2001, MA-01-01D-03 (CAS, INHS).
Remarks. This species differs from other species of Igerna known from the island in having a less developed anterolateral foliaceous process on the aedeagal shaft.
Acknowledgements
We are grateful to Dr. C.H. Dietrich (INHS), California Academy of Sciences and Dr. M. Boulard, Paris Museum, France, for making available the material used in this study, to Dr. J. Poorani, National Bureau of Agriculturally Important Insects, Bangalore, and Mr. Yeshwanth, H.M. University of Agricultural Sciences, Bangalore for help in preparing the illustrations. A fellowship from Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) to A. C. G. is acknowledged. We also thank the anonymous reviewer for his constructive comments.
References
Davis, R.B. (1975) Classification of selected higher categories of auchenorrhynchous Homoptera (Cicadellidae and Aetalionidae). U.S. Department of Agriculture Technical Bulletin, 1494, 1–52.
Distant, W.L. (1917) The Percy Sladen Trust Expedition to the Indian Ocean in 1905, under the leadership of Mr J. Stanely Gardiner, M.A. Vol. VI, No. VII. - Rhynchota, Part II: Suborder Homoptera. Transactions of the Linnean Society, London, 17, 273 –486. http://dx.doi.org/10.1111/j.1096-3642.1917.tb00469.x
Evans, J.W. (1953) Les Cicadellidae de Madagascar (Homopteres). Memoires de l’Institut Scientifique de Madagascar, 4, 87–137.
Evans, J.W. (1959) Quelques nouveuax Cicadellides (Homopteres) de Madagascar: Observations sur la signification evolutive de la speciation dans le genre Coloborrhis Germar. Memoires de l’Institut Scientifique de Madagascar-tananarive, 11, 481 –507.
Freytag, P.H. & Knight, W.J. (1966) The Idiocerinae of Madagascar (Hom., Cicadellidae). Annales de la Societe Entomologique de France, 11, 75–103.
Kirkaldy, G.W. (1903) Einege neue und wenig bekannte Rhynchoten. Wiener entomologische Zeitung, 22, 13.
Krishnankutty, S.M. & Dietrich, C.H. (2011 a) Review of mileewine leafhoppers (Hemiptera: Cicadellidae: Mileewinae) in Madagascar, with description of seven new species. Annals of Entomological Society of America, 104, 636 –648. http:// dx.doi.org/ 10.1603/AN11022
Krishnankutty, S.M. & Dietrich, C.H. (2011 b) Taxonomic revision and phylogeny of an endemic leafhopper genus Nesocerus (Hemiptera: Cicadellidae: Idiocerinae) from Madagascar. Zoological Journal of the Linnean Society 162, 499 –543. http:// dx.doi.org/ 10.1111/j.1096-3642.2010.00690.x
Oman, P.W. (1933) A classification of North American agallian leafhoppers. U.S. Department of Agriculture, Technical Bulletin 372, 93 p.
Oman, P.W. (1934) South American leafhoppers of the genus Agalliana. Revista de Entomologia 4, 333 –340.
Oman, P.W. (1949) The Nearctic leafhoppers (Homoptera: Cicadellidae). A generic classification and check list. Memoirs of the Entomological Society of Washington, 3, 1– 253.
Rakitov, R.A. (1998) On differentiation of cicadellid leg chaetotaxy (Homoptera: Auchenorrhyncha: Membracoidea). Russian Entomological Journal, 6, 7–27.
Stål, C. (1866) Hemiptera. Homoptera Latr. Hemiptera Africana, 4, 1–276.
Viraktamath, C.A. (2011) Revision of the Oriental and Australian Agalliini (Hemiptera: Cicadellidae: Megophthalminae). Zootaxa, 2844, 1–118.
description: Published as part of Viraktamath, C. A. & Gonçalves, Ana Clara, 2013, Review of Madagascaran Agalliini (Hemiptera: Cicadellidae: Megophthalminae) with descriptions of a new genus and six new species, pp. 1-21 in Zootaxa 3616 (1) on pages 10-11, DOI: 10.11646/zootaxa.3616.1.1, http://zenodo.org/record/283352