Cosmetra juu, Aarvik, Leif, 2016

Aarvik, Leif, 2016, Redefinition and revision of African Cosmetra Diakonoff, 1977 (Lepidoptera: Tortricidae) with description of six new species, Zootaxa 4088 (2), pp. 245-256 : 255-256

Cosmetra juu new species

( Figs. 9, 10 , 18 , 25 )

Type material. Holotype, ♂, KENYA: Rift Valley: Mt. Longonot, 8500 ft, 21.xi.1999, D.J.L. Agassiz, genitalia slide 2015.015 L. Aarvik (DA); Paratypes, 2♂, 4♀, same locality as holotype, 2♂, 21.xi.1999; 1♀, 20.iv.2003, genitalia slide L. Aarvik 2015.016; 3♀, 3.xi.2003 (DA). The holotype will be deposited in the collection of the Natural History Museum, London.

Diagnosis. Due to variation in forewing pattern, C. juu overlaps externally with both C. multidentana and C. usambarensis . In the male genitalia C. juu differs from both species by the strongly modified uncus and socii. In the female genitalia it is close to C. usambarensis , but those of C. juu have a longer ductus bursae. There are wide gaps between the known geographical ranges of the three.

Description. Male ( Fig. 9 ). Head: Light ochreous, rough scaled, with forward directed tuft. Antenna pale brown. Labial palpus ca. 1.5 times diameter of eye, light ochreous, lightly sprinkled with brown, edge of scale brush dark brown, third segment with white tip. Thorax: Light brown. Fore- and mid-leg grey, with light rings, hind-leg cream, tarsi ringed with light grey. Wingspan 12.0–14.0 mm. Forewing upperside light ochreous, with some greyish suffusion and fine transverse striae; costal strigulae indicated by greyish dots, dark brown suffusion form a dorso-postbasal blotch and smaller rounded tornal blotch; dorsal patch indistinct, appears as a lighter than rest of wing; terminal line cream; cilia basally light, terminally darker than rest of wing. Hindwing light grey, veins with slight dark suffusion. Abdomen: Genitalia ( Fig. 18 ) with uncus split into two rod-like processes (top of tegumen fractured medially by pressure of cover glass in figured specimen); socii with long rod-like extension; gnathos arms with sclerotized dorsal margin; valva slightly constricted past the saccular angle, ventral margin of cucullus slightly concave above middle, with spines on lower two thirds.

Female ( Fig. 10 ). Head and Thorax: Similar to male, but forewing, head and thorax with reddish hue; larger than male, wingspan 14.0–16.0 mm. Abdomen: Genitalia ( Fig. 25 ) with apophyses posteriores and anteriores of same length; sterigma as in previous species, C. usambarensis ; ductus bursae broad, relatively long, slightly asymmetrical and widened towards corpus bursae.

Variation. Both males and females vary in the expression of the forewing pattern. The dorsobasal blotch and tornal blotch may be weak or even absent. One female examined has a more yellowish forewing ground colour, and two dark grey bands in the median part of the wing.

Distribution. Known only from the top of Mt. Longonot, Kenya.

Ecology. The locality is the rim of the volcano around the crater, which has some Erica arborea L. and a few other small trees (D. Agassiz, pers. comm.).

Etymology. The name indicates the habitat at 2750 m on top of Mt. Longonot. The word “ juu ” in Swahili means ‘up’ or ‘above’.

Figures

FIGURES 1 – 10. Adults of Cosmetra. 1. C. spiculifera (Meyrick). Male from Ghana: Paradise Mt. 2. C. larseni, n. sp. Paratype male from Kenya: Gilgil. 3. C. tumulata (Meyrick). Female from Rep. South Africa: Waterval-Boven. 4. C. fibigeri, n. sp. Holotype male from Uganda: Malamigambo Forest. 5. C. truncana, n. sp. Paratype female from Malawi: Mulanje Mts. 6. C. multidentana, n. sp. Paratype male from Tanzania: Kigogo Forest. 7. C. usambarensis, n. sp. Paratype male from Tanzania: Usambara Mt., Magamba. 8. C. usambarensis, n. sp. Paratype female from Tanzania: Usambara Mt., Magamba. 9. C. juu, n. sp. Paratype male from Kenya: Mt. Longonot. 10. C. juu, n. sp. Paratype female from Kenya: Mt. Longonot. Scale 5 mm.

FIGURES 11 – 18. Male genitalia of Cosmetra. 11. C. spiculifera (Meyrick) (slide NHMO 2597). 12. C. larseni, n. sp. (slide NHMO 2160). 13. C. tumulata (Meyrick) (slide NHMO 2161). 14. C. fibigeri, n. sp. (slide NHMO 2719). 15. C. truncana, n. sp. (slide L. Aarvik 2013.010). 16. C. multidentana, n. sp. (slide NHMO 2839). 17. C. usambarensis, n. sp. (slide L. Aarvik 2015.010). 18. C. juu, n. sp. (slide L. Aarvik 2015.015). Scale 1 mm.

FIGURES 23 – 25. Female genitalia of Cosmetra. 23. C. multidentana, n. sp. (slide NHMO 2721). 24. C. usambarensis, n. sp. (slide L. Aarvik 2015.012). 25. C. juu, n. sp. (slide L. Aarvik 2015.016). Scale 1 mm.