Megalota festuca, Pinkaew & Muadsub, 2021

Pinkaew, Nantasak & Muadsub, Sopita, 2021, Megalota festuca Pinkaew and Muadsub (Lepidoptera: Tortricidae: Olethreutinae), a new species from Thailand, Zootaxa 5026 (4), pp. 595-600 : 596-600

Megalota festuca sp. nov.

urn:lsid:zoobank.org:pub:FEC91D3E-FCB9-4E92-9C7E-F917F2873FEF

( Figs. 1–15 )

Type Materials. HOLOTYPE. THAILAND. ♂; Uthai Thani Prov., Huai Kha Khaeng W.S., 15 o 33ʹ11ʺN, 99 o 17ʹ45ʺE, alt. 250 m; 20 Aug. 2020; Pinkaew et al. leg.; np13374 (genitalia slide NP3959); KKIC . PARATYPES. THAILAND — 42♂, 6♀; Nakhon Si Thammarat Prov., Khao Nan N.P., 08 o 55ʹ25ʺN, 99 o 39ʹ49ʺE, alt. 131 m; 11 Jan. 2008; np2503 (♂, genitalia slide NP1205), np2510 (♂, genitalia slide NP1204). Kanchanaburi Prov., Thong Pha Phum N.P., 14 o 41ʹ43ʺN, 98 o 27ʹ34ʺE; 19 Feb. 2004, np1072 (♂, genitalia slide NP607), Sahakorn Nikhom Com. For., 14 o 45ʹ40ʺN, 98 o 49ʹ14ʺE, alt. 965 m; 12 May 2018, np12139 (♀, genitalia slide NP3910), np11134 (♂, genitalia slide NP3928). Uthai Thani Prov., Huai Kha Khaeng W.S., 15 o 29ʹ27ʺN, 99 o 18ʹ03ʺE, alt. 550 m; 11 Oct. 2020; np13514 (♂), Huai Kha Khaeng W.S., 15 o 36ʹ32ʺN, 99 o 18ʹ58ʺE, alt. 195 m; 19 Dec. 2020, np13749 (♂); same data as holotype; np13375 (♂, genitalia slide NP3960), np13472 (♂), np13473 (♂), np13474 (♂), np13475 (♂); same collection data as holotype; 12 Oct. 2020; np13533 (♂), np13534 (♂), np13535 (♂), np13538(♂); same collection data as holotype; 17 Dec. 2020; np13673 (♂), np13674 (♂), np13675 (♂); same collection data as preceding; 13 Mar. 2021, np13786 (♂), np13787 (♂), np13788 (♂), np13789 (♂). Prachinburi Prov., Khao Yai N.P., 14 o 11ʹ02ʺN, 101 o 36ʹ19ʺE, alt. 201 m; 15 Mar. 2010; np3505 (♀, genitalia slide NP1406), np3506 (♀, genitalia slide NP2747). Sa Kaeo Prov., Pang Sida N.P., 13 o 59ʹ36ʺN, 102 o 12ʹ21ʺE, alt. 165 m; 12 Jun. 2017; np10503 (♂); same collection data as preceding; 27 Apr. 2017; np10135 (♀), np10059 (♂, genitalia slide NP3909), np10060 (♂, genitalia slide NP3921), np10783 (♂, genitalia slide NP3925), np10797 (♂, genitalia slide NP3926); Pang Sida N.P., 14 o 02ʹ25ʺN, 102 o 15ʹ56ʺE, alt. 310 m; 1 Mar. 2017; np9539 (♂, genitalia slide NP3911); same collection data as preceding; 26 Apr. 2017; np10051 (♂); same collection data as preceding; 21 Jun. 2017; np10456 (♂, genitalia slide NP3924); same collection data as preceding; 18 Oct. 2017; np12135 (♂, genitalia slide NP3920); Pang Sida N.P., 14 o 00ʹ54ʺN, 102 o 11ʹ45ʺE, alt. 260 m; 24 Apr. 2017; np9882 (♂, genitalia slide NP3912), np9886 (♂, genitalia slide NP3913), np9887 (♂, genitalia slide NP3914), np9893 (♂, genitalia slide NP3915), np9902 (♂), np9909 (♂, genitalia slide NP3916), np10352 (♂, genitalia slide NP3922), np10390 (♀, genitalia slide NP3923); same collection data as preceding; 16 Oct. 2017; np10927 (♀, genitalia slide NP3927); Pang Sida N.P., 14 o 07ʹ37ʺN, 102 o 15ʹ30ʺE, alt. 610 m; 25 Apr. 2017; np9932 (♂, genitalia slide NP3917), np9950 (♂, genitalia slide NP3918), np9960 (♂, genitalia slide NP3919). Chaiyaphum Prov., Phu Khieo W.S., 16 o 30ʹ24ʺN, 101 o 41ʹ22ʺE, alt. 770 m; 14 Dec. 2018; np12654 (♂); all specimens collected by Pinkaew et al. and deposited in KKIC .

Diagnosis. Megalota festuca sp. nov. is distinguished from all other species in the genus by the shape of the uncus (basal half narrow, long and slender, apical half distinctive divergent, oblong and drooping), and enlarged, long pendant socii.

Description. Head ( Figs. 5–6 ): Lower frons yellowish white, upper frons light brown; vertex, pronotal collar and mesonotum brown mixed with light brown; posterior crest dark brown; labial palpi porrect, first segment white, second segment widened apically, basal half white to light brown with a dark brown mark dorsally, apical half light brown with transverse dark brown band from beyond dorsomedially extending oblique, widened to ventroapically, third segment light brown; antenna brown, reaching to middle of forewing. Thorax: Pronotal collar, mesonotum and posterior crest pale brown; tegulae pale brown with basal 1/3 dark brown; inner side of hind tibia with a tuft of yellowish white hair pencils extending from base to over half length ( Fig. 9). Forewing subrectangular, length 9.3–12.6 mm in male ( Fig. 3 ) (n = 43), 10.7–13.4 mm in female ( Fig. 4 ) (n = 6); costal margin evenly curve, with reddish brown scales (light brown in female) along costa especially apical half; termen straight; costal strigulae well developed, whitish marks separated by blackish streaks ( Figs. 1–4 ); ground color dark grey, paler near termen, with a large dark brown patch extending from wing base to apical 4/5 of wing length, and from dorsum to over half of wing width, distal part of patch broken by ground color, dorsal margin irregular, outer margin edged with yellowish white narrow line, represented by a large U-shaped dark brown patch in resting posture ( Fig. 2 ), upper of patch with long, irregular, sinuate strip extending from near wing base to apical 4/5 of wing length at between M 1 and M 3 (indistinct in female), middle of costa with a slightly sinuate band extending obliquely to termen at between M 2 and CuA 1, dark brown mixed with reddish brown (dark brown mixed with brown in female), wing apex with dark brown mark, with diffuse, short transverse dark brown striae alternated with light brown scales along termen between CuA 1 to tornus; fringe scales with inner row brownish red and outer row brown extending from wing apex to tornus except light brown scales between CuA 2 to 1A+2A; underside light brown with white spots on costa and termen. Hindwing brown, slightly paler to base; anal margin modified in male, thickened edge, light brown ( Fig. 7 ); underside light brown with thickened, folded anal margin, yellowish white in male ( Fig. 8 ).

Abdomen: Male genitalia ( Fig. 10 ) with tegumen ovate; uncus distinct with basal half long and slender, apical half divided into two pendant oblong lobes, slightly narrowed to rounded apex, inner side with densely bristles reaching apex: socii forming large and long pendant lobe, rounded apex, densely setose; gnathos a weakly sclerotized band; vinculum moderately wide; juxta subtriangular; caulis very short, anellus wide, rounded cup-shaped surrounding base of phallus; phallus moderately long and wide, upper part sclerotized, dorsoapical half with short (variably sized) and strong denticles (8 in holotype) ( Fig. 11 ) (4–14 in paratypes); dorsobasally with an oval costal process, apex with small group of short stout spines pointing inwardly, beneath surrounding with dense sockets reaching middle of lobe; apical part of sacculus with subtriangular lobe, projecting inwardly to middle of basal opening, with moderately dense setae; neck with shallowed excavation ventrally, moderately wide, lower part with a large patch of dense, long spiniform setae pointing ventrally; cucullus oblong ovate, rounded apex, pointing outwardly, densely setose at basal 1/3. Female genitalia ( Figs. 12–15 ) with papillae anales densely setose; apophyses anteriores as long as apophyses posteriores; sternum 7 moderately sclerotized, posterior half with dense scale sockets, becoming more dense near posterior edge, posterior margin emarginated medially forming a wide, V-shaped, posterior edge sclerotized except medially; tergum 8 with dense scale sockets along posterior margin reaching triangular lateral extensions; ostium bursae round, located between sternum 7 and 8; sterigma moderately large surrounding ostium bursae ( Figs. 12–13 ), lamella postvaginalis sclerotized, excavated dorsomedially produced into two rounded lobes with sclerotized edges projecting posteriorly, each lobe with a small patch of dense scale sockets dorsally, ventrally connected with membrane to weakly sclerotized, semicircular lamella antevaginalis; ductus bursae as long as of corpus bursae length, slightly widened to corpus bursae; colliculum forming two sclerites on opposite sides of ductus bursae beneath ostium bursae; ductus seminalis originating anterior 1/3 of ductus bursae; corpus bursae ovate with rather small scobination patch (= signum) which varies in size and number in different specimens ( Figs. 14–15 ).

Distribution. Thailand (Uthai Thani, Nakhon Si Thammarat, Kanchanaburi, Prachinburi, Sa Kaeo and Chaiyaphum province).

Etymology. The specific epithet ( festuca = stalk) refers to the basal half of uncus.

Figures

FIGURES 1–2. Living specimen of Megalota festuca sp. nov. with natural resting posture. 1. Lateral view. 2. Dorsal view.

FIGURES 3–4. Wing pattern of Megalota festuca sp. nov. 3. Male (holotype). 4. Female (paratype). scale bars = 2 mm.

FIGURES 5–6. Head of Megaloata festuca sp. nov. 5. Male (holotype). 6. Female (paratype).

FIGURES 7–8. Anal margin of hindwing of Megalota festuca sp. nov. (holotype). 7. Upperside. 8. Underside.

FIGURES 10–11. Morphological features of male genitalia of Megalota festuca sp. nov. (holotype, genitalia slide NP3959). 10. Genital capsule. 11. Phallus.

FIGURES 12–15. Morphological features of female genitalia of Megalota festuca sp. nov. 12. Genital capsule (paratype NP3910). 13. Ostium and sterigma (paratype NP3910). 14. Signum (paratype NP3910). 15. Signum (paratype NP3923).