Palaeugoa secunda Volynkin, 2017

Volynkin, Anton V., 2017, A new species of Palaeugoa Durante, 2012 from Sierra Leone (Lepidoptera, Erebidae, Arctiinae), Zootaxa 4353 (2), pp. 385-388 : 385-386

Palaeugoa secunda Volynkin , sp. nov. ( Figs. 1, 2 , 5, 7 )

Type material. Holotype ( Figs. 1 , 5 ): ♂, Sierra Leone, 180 m, Western Area Peninsula Forest Reserve, 6.X. [20]15, N08°20'57''; W13°10'42'', Light trap, R. Goff coll., leg . Smith, R. & Takano, H. / ANHRT:2017.18.1, slide No.: AV 2926m (Coll. ANHRT). Paratypes: 1 ♂, 1 ♀, with the same data as the holotype, ANHRT:2017.18.3, slide No. : AV2928f ; 5 ♂, same locality and collectors, but collected at 24.X. [20]15, ANHRT:2017.18.2, slide AV 2927m ; 4 ♂, 1 ♀, same locality and collectors, but collected at 21.IX. [20]15, ANHRT:2017.18.12, slide AV 3010m, ANHRT:2017.18.13, slide AV 3011m, ANHRT:2017.18.14, slide AV 3012m (Coll. ANHRT) .

Diagnosis. The new species ( Figs. 1, 2 ) is very similar externally to P. spurrelli ( Figs. 3, 4 ) differing from that by the slightly broader forewings, and the narrower posterior part of the postmedial fascia. The male genitalia ( Fig. 5 ) differs clearly from that of P. spurrelli ( Fig. 6 ) by its larger uncus, longer tegumen, narrower vinculum, much shorter medial ventral process of juxta, broader valva with less developed subapical costal fold, weaker distal saccular process, much larger and apically pointed setose transtillar processes and broader aedeagus. The female genitalia ( Fig. 7 ) is very similar to that of P. spurrelli ( Fig. 8 ) and differs only in the slightly smaller papillae anales, the stronger scobination of the 7th sternite, and the slightly stronger spinulose scobination of appendix bursae.

Description. Adult ( Figs. 1, 2 ). Length of forewing 7.5–8.5 mm in males and 10 mm in females. Head and thorax ochreous yellow; abdomen pale ochreous. Forewing with rounded apex and tornus. Ground color of forewing pinkish yellow. Pattern dark brown, diffuse, consists of W-like basal fascia, double and wavy antemedial fascia, broad longitudinal strip on vein Cu connecting ante- and postmedial fasciae, round distal spot, and double and wavy postmedial fascia which is very broad posteriorly and narrow at costa. Cilia pinkish yellow. Hindwing pale ochreous yellow, pattern absent. Male genitalia ( Fig. 5 ). Uncus short, dorso-ventrally flattened, trigonal, setose; tuba analis weakly scobinated; tegumen short and broad, heavily sclerotized; manica membranous; juxta broad, bilobate, with short trigonal medial ventral process rounded apically; vinculum short and narrow, U-shaped. Valva elongated; costa weakly sclerotized, forming short setose fold apically; distal part of valva moderately sclerotized, lobe-like, rectangular with rounded angles; transtilla with very long, curved, apically pointed and setose transtillar process heavily connected to manica; sacculus moderately sclerotized, narrow, with long, trigonal narrow distal process. Aedeagus long and narrow, straight; vesica membranous, with several globular diverticula having weak granulation. Female genitalia ( Fig. 7 ). Ovipositor short, broad, conical; papillae anales rectangular, with rounded angles; apophyses posteriores long and thin; apophyses anteriores reduced, pimple-like; ostium bursae narrow; 7th sternite around ostium bursae strongly wrinkled and scobinated; ductus bursae very short, membranous; posterior section of corpus bursae narrow, heavily sclerotized; anterior section of corpus bursae elliptical, membranous, with very weak spinulose scobination; appendix bursae situated postero-laterally, elliptical-globular, with strong spinulose scobination.

Distribution. The species is known from lowland forested habitat in Western Sierra Leone.

Etymology. 'Secunda' means 'second' in Latin; referring to the new species is being the second known species of the genus Palaeugoa .

Figures

FIGURES 1–4. Palaeugoa spp.: adults.1, P.secunda, holotype male, Sierra Leone (ANHRT); 2, P.secunda, paratype female,Sierra Leone (ANHRT);3,P. spurrelli, syntypemale, Ghana (©NHMUK);4, P. spurrelli, syntypefemale, Ghana (©NHMUK).

FIGURES 5–8. Palaeugoa spp.: male (5, 6) and female (7, 8) genitalia. 5, P. secunda, holotype, Sierra Leone, slide AV2926m (ANHRT:2017.18.1); 6, P. spurrelli, syntype, Ghana, slide BMNH(E) Arct-301 (©NHMUK); 7, P. secunda, paratype, Sierra Leone, slide AV2927f(ANHRT:2017.18.3) Volynkin; 8, P. spurrelli, syntype,Ghana, slide BMNH(E) Arct-5756 Durante (©NHMUK).