Nanna molouba, Durante & Apinda-Legnouo & Romano, 2013

Durante, Antonio, Apinda-Legnouo, Emelie Arlette & Romano, Chiara, 2013, Second contribution to the knowledge of the Lithosiini of Gabon: the genus Nanna Birket-Smith (Lepidoptera, Erebidae, Arctiinae), European Journal of Taxonomy 65, pp. 1-15 : 12-14

Nanna molouba sp. nov.

urn:lsid:zoobank.org:act:2B2F8C94-2AA5-45E0-9A5B-DEF470A55E0D

Figs 3J , 4D

Diagnosis

Species similar to N. collinsi , N. colonoides , N. eningae and N. melanosticta , but easily distinguishable thanks to the bipectinate antennae of N. molouba sp. nov. Nanna magna also has bipectinate antennae, but its genitalia are clearly different.

Etymology

This species is dedicated to the kind Dr. Aurelie Flore Molouba, head of the Scientific Commission of the CENAREST. Noun in apposition (ICZN article 11.9.1.2).

Type material

Holotype

♂, MSNS.

Paratypes

5 ♂♂, 5-10 Apr. 2010; 3 ♂♂, 19 Feb.-11 Mar. 2011. Same locality as the holotype. MSNS and MAD.

Type locality

GABON: Makokou-Ipassa, 500 m, 0°30’43’’N, 12°48’13’’E, 19 Feb.-11 Mar. 2011.

Description

Habitus

Wingspan: ♂ 36-42 mm. Forewing upper side ground colour whitish; basal third of the costa sometimes blackish; pattern with two black dots on the median area, one on the costal margin, and another one between the CuA2 and the anal vein. Hindwing upper side ground colour white. Forewing underside ground colour slightly darker than the upper side, with a creamy fascia along the costal margin. Hindwing underside as in the upper side. Fringes of the same colour as that wing’s ground colour.

Head yellow, labial palpi yellow, porrect or slightly downward, male antennae bipectinate, yellow along the first fourth, shading to brown toward the apex.

Patagia yellow, tegulae whitish, notum anteriorly yellow, shading backward to whitish. Thorax ventrally yellow.

Forelegs yellow with femur and tibia externally grayish brown, tarsus lighter; mid- and hindlegs yellow with articulation between femur and tibia grayish brown. All praetarsi brown. Spurs formula 0-2-4.

Abdomen yellow.

Genitalia

MALE. A8 tergum rectangular, slightly shorter than seventh segment; A8 sternum slightly sclerotized, bar-like, arch-shaped, with two apodemal blunt cephalad appendices.

Uncus slender, long, caudally bent, ending in a point; tegument pear-shaped (ventral view); vinculum semicircular, strong, with a median concavity. Juxta great, upside down Y-shaped, well sclerotized.

Basis valvae sclerotized at the junction with the juxta, with which it forms a pseudo-articulation; membranous at supravalvar level.

Ala valvae with ventral margin sclerotized and swollen, dorsal margin membranous.

Supravalva sclerotized with ventral margin membranous.

Distal process of the ala valvae strongly sclerotized, with a triangular process ( Fig. 4D , arrow) at the distal third of the valvar length, and a robust hook-like termination ending in a big thorn and dorsally

covered by slim spines. Distal process of the supravalva less sclerotized than the previous one, large and spatulate.

Aedeagus quite narrow, partially membranous (pseudaedoeagus of Birket-Smith 1965), without coecum; vesica small, with sparse tiny thorns and two lobes, one at the base and one apically on the main lobe (respectively numbered 1 and 2 in Fig. 4D ).

Figures

Fig. 3.Adults. A. Nanna ceratopygia Birket-Smith, 1965, ♂, Gabon, Makokou-Ipassa, 500 m, 0°30’43’’N 12°48’13’’E, 19 Feb.-11 Mar. 2011. B. Nanna ceratopygia, ♀ allotype. C. Nanna eningae (Plötz, 1880), ♀ holotype. D. Nanna eningae, ♂, Gabon, Makokou-Ipassa, 500 m, 0°30’43’’N 12°48’13’’E, 19 Feb.- 11 Mar. 2011, gen. prep. n. 697/12 MAD. E. Nanna eningae, ♂, Gabon, Makokou-Ipassa, 500 m, 0°30’43’’N 12°48’13’’E, 16-28 Feb. 2012, gen. prep. n. 705/12 MAD. F. Nanna eningae, ♀, Gabon, Makokou-Ipassa, 500 m, 0°30’43’’N 12°48’13’’E, 5-10 Apr. 2010. G. Nanna semigrisea sp. nov., ♂ paratype, gen. prep. n. 709/12 MAD. H. Nanna semigrisea sp. nov., ♂ paratype, gen. prep. n. 708/12 MAD. I. Nanna semigrisea sp. nov., ♀ paratype, gen. prep. n. 699/12 MAD. J. Nanna molouba sp. nov., ♂ holotype.

Fig. 4. Male genitalia. Figures are not in equal proportion; the aedeagus, on the right, is enlarged. A. Nanna ceratopygia Birket-Smith, 1965, ♂, Gabon, Makokou-Ipassa, 500 m, 0°30’43’’N 12°48’13’’E, 19 Feb.-11 Mar. 2011, gen. prep. nov. 729/13 MAD. B. Nanna eningae (Plötz, 1880), ♂, Gabon, Makokou-Ipassa, 500 m, 0°30’43’’N 12°48’13’’E, 19 Feb.-11 Mar. 2011, gen. prep. n. 697/12 MAD. C. Nanna semigrisea sp. nov., ♂ paratype, Gabon, Makokou-Ipassa, 500 m, 0°30’43’’N 12°48’13’’E, 19 Feb.-11 Mar. 2011., gen. prep. n. 698/12 MAD. Arrows: a = ventral sclerotization of the basis valvae; b = processus basalis plicae; c = distal sclerotized bar. s = tha moderate swelling in the vesica. 1-4 = lobes of the vesica. D. Nanna molouba sp. nov., ♂ paratype, Gabon, Makokou-Ipassa, 500 m, 0°30’43’’N 12°48’13’’E, 5-10 Apr. 2010, gen. prep. n. 562/10 MAD.