Dracontogena gilligani Aarvik & Karisch

Aarvik, Leif, Karisch, Timm & Marthinsen, Gunnhild, 2012, Review of the Afrotropical genus Dracontogena Diakonoff, 1970 (Lepidoptera, Tortricidae) with descriptions of eight new species, Zootaxa 3478, pp. 345-372 : 358-361

Dracontogena gilligani Aarvik & Karisch , new species

( Figs. 18, 19 , 31 , 49 , 50, 70 , 71)

Type material. Holotype, 3, KENYA: Rift Valley, Gilgil 0o32’S 36o22’E, 2100 m., 27.xi.2005, D.J.L. Agassiz, genitalia slide BMNH 28993 ( BMNH). Paratypes: 1Ƥ, same locality and collector as holotype, 26.xi.2005, genitalia slide BMNH 28994 ( BMNH); 1Ƥ, same locality, 26.xi.2010, T. Gilligan, genitalia slide L. Aarvik 2860 ( LA); 533, same locality, 28–30.xi.2010, T. Gilligan ( TD); 1Ƥ, Mt. Elgon , viii.1954, T.H.E. Jackson, genitalia slide USNM 137,555 ( USNM).

Description. Adult. Male ( Fig. 18 ). Head: Brownish black. Antenna brownish grey, scape white. Labial palpus 1,5 times diameter of eye, brown, intermixed with black scales, extreme tip white. Thorax: Dorsum and tegulae with narrow black edge in front, broad white band before middle and white posterior scale tuft. Fore and mid-legs dark grey, hind leg beige; fore and mid-tarsi with paler rings; fore and mid-tibiae with basal, medial and distal light dots; hind tibia with beige scale tuft, hind tarsi with grey rings. Wingspan 18.0–19.0 mm. Forewing black, suffused with brown in distal third, particularly in tornal area; costal strigulae white; dorsal maculae rounded, connected, outer macula with dark dots; tiny discal white dot; cilia grey, rather large white patch below apex. Hindwing light grey, with single cilia line.

Female ( Fig. 19 ). Head: As in male. Thorax: Wingspan 21.0–22.0 mm. Labial palpus 2 times diameter of eye. Male genitalia ( Figs. 49, 50 ). Cucullus rather slender, dorsal and ventral edge nearly parallel, sacculus shallowly concave between sacculus and cucullus, phallus ( Fig. 50 ) of medium length, 607–676 μm., slightly tapering from beyond middle, ventral edge rugose, with 44–48 small cornuti. Tergite 8 ( Fig. 31 ) very short, deeply incised laterally.

Female genitalia ( Figs. 70, 71 ). Sternite 7 with narrow, deep U-shaped excavation; sterigma oval, extended posteriorly, weakly sclerotised on right side; ductus bursae with weak internal sclerite near ostium; the paired oval sclerites posterior of sterigma distinct, well separated from each other and posterior edge of sterigma.

Diagnosis. The male genitalia of D. gilligani are distinguished by the rugose ventral wall of the phallus, and the female genitalia by the elongate sterigma and separate oval sclerites.

Distribution. Kenya.

Biology. The habitat in Kenya is high elevation grassland and mixed scrub predominantly with leleshwa ( Tarchonanthus camphoratus L.) ( Asteraceae ) and some Acacia gerrardii Benth. (Fabaceae) .

Etymology. The species is named after Todd Gilligan, who collected a series at Gilgil, Kenya.

Remarks. A male from Malawi with the following data: Zomba District: Zomba Plateau, 15o22.010’S 35o18.959’E, 1470 m., 19–20.i.2006, A.J. Kingston, genitalia slide L. Aarvik 2838 (LA), was first identified as D. gilligani n. sp. However, in the COI neighbour-joining tree, this specimen (termed Dracontogena sp. B) and a specimen from Kenya herein described as D. gilligani n. sp. cluster together with specimens not thought to be D. gilligani n. sp. ( Fig. 78 ).

Figures

FIGURE 78. Neighbour-joining tree based on COI sequences. The Kimura- 2 substitution model is applied. Numbers at nodes indicate bootstrap support based on 1000 replications. The Thaumatotibia leucotreta sequence used as outgroup is taken from Genbank, accession number is given.

FIGURES 18 – 22. Adults of Dracontogena. 18. D. gilligani n. sp. male. 19. D. gilligani n. sp. female. 20 – 21. D. sundi n. sp. males. 22. D. deltozyga (Meyrick) male. Scale 10 mm.

FIGURES 23 – 33. Tergite 8 in males of Dracontogena. 23. D. continentalis Karisch (slide L. Aarvik 2735). 24. D. agassizi n. sp. (slide T. Karisch 2235). 25. D. rubondoensis n. sp. (slide L. Aarvik 2734). 26. D. bjornstadi n. sp. (slide L. Aarvik 2733). 27. D. angolensis n. sp. (slide BMNH 28995). 28. D. bernardi Karisch. (slide L. Aarvik 2808). 29. D. solii n. sp. (slide NHMO 2010). 30. D. kingstoni n sp. (slide L. Aarvik 2010.004). 31. D. gilligani n. sp. (slide BMNH 28993). 32. D. sundi n. sp. (slide L. Aarvik 2809). 33. D. deltozyga (Meyrick) (slide L. Aarvik 2007.010). Scale 1 mm.

FIGURES 47 – 54. Male genitalia in Dracontogena. 47. D. kingstoni n. sp. (slide L. Aarvik 2010.004). 48. D. kingstoni n. sp. phallus (slide L. Aarvik 2010.004). 49. D. gilligani n. sp. (slide BMNH 28993). 50. D. gilligani n. sp. phallus (slide BMNH 28993). 51. D. sundi n. sp. (slide L. Aarvik 2810). 52. D. sundi n. sp. phallus (slide L. Aarvik 2810). 53. D. deltozyga (Meyrick) (slide L. Aarvik 2007.010). 54. D. deltozyga (Meyrick) phallus (slide L. Aarvik 2007.010). Scale figs. 47, 49, 51, 53: 1 mm., figs. 48, 50, 52, 54: 0.5 mm.

FIGURES 68 – 71. Female genitalia of Dracontogena. 68. D. kingstoni n. sp. (slide NHMO 2021). 69. D. kingstoni n. sp. sterigma and sternite 7 (slide NHMO 2021). 70. D. gilligani n. sp. (slide L. Aarvik 2860). 71. D. gilligani n. sp. sterigma and sternite 7 (slide BMNH 28994). Scale figs. 68, 70: 1 mm., figs. 69, 71: 0.5 mm.