Streblote gerry, Prozorov & Prozorova & Spitsyn & Spitsyna & Volkova & Yakovlev & Meier & Saldaitis & Revay & Müller, 2022

Prozorov, Alexey M., Prozorova, Tatiana A., Spitsyn, Vitaly M., Spitsyna, Elizaveta A., Volkova, Julia S., Yakovlev, Roman V., Meier, Jürg, Saldaitis, Aidas, Revay, Edita E. & Müller, Günter C., 2022, Notes on Streblote (Lepidoptera, Lasiocampidae, Lasiocampinae) from the Malay Archipelago with two new species description, Ecologica Montenegrina 58, pp. 14-28 : 22-24

Streblote gerry sp. n.

http://zoobank.org/ urn:lsid:zoobank.org:act:EC58D7FE-3F94-465F-B66C-A114DAB8EFA9

( Figs 19–21 , 27 , 33 , 38–40 )

Type material. Holotype ♂, Indonesia, Sumatra, Aceh Province, 1916, leg. G. Herman, slide 2022 0094 ( NBCL) . Paratypes (2♀ total). Indonesia, Sumatra: ♀, Medan Deli, leg. Fulmek ( NBCL) ; ♀, North Sumatra Province, Parapat , 19.VIII.1979, leg. E. Diehl ( ZSM) .

Description. Male ( Fig. 20 ). Antenna orangish, flagellum covered with creamy speckled scales. Palpi orange. Eyes dark brown, naked. Head and thorax mesially creamy with dark dense speckles, tegulae reddish brown. Abdomen from reddish brown. Epiphysis on the fore leg absent. Forewing. Forewing length: 25 mm; wingspan: 51 mm. Triangular, apex acute, outer margin slightly waved. Background color reddish brown. Pattern consists of orangish basal spot, two pale waved medial lines, orangish eye-like spot in medial field with dark R-Cu vein and faded orangish fragmented external line. Cilia yellowish creamy. Hindwing. Trapezoid. Background color reddish brown with faded yellowish creamy medial line. Cilia creamy, gets darker on anal angle. Genitalia ( Figs 27 , 33 ). Similar to S. pallida (see above). Female ( Figs 19, 21 ). Bigger, little paler and less contrasty than male. Antenna orangish, flagellum covered with creamy scales. Palpi orange. Eyes dark brown, naked. Head and thorax mesially creamy, tegulae orangish or reddish brown. Abdomen creamy or reddish brown. Forewing. Forewing length: 36–45 mm; wingspan: 70–90 mm. Oval-shaped, apex blunt, outer margin slightly waved. Background color reddish or orangish brown. Pattern consists of weakly pronounced orangish basal spot, two pale waved medial lines, weakly pronounced medial orangish eye-like spot and faded orangish fragmented external line. Cilia brownish. Hindwing. Egg-shaped. Background color reddish or orangish brown with more or less pronounced creamy medial line. Cilia brownish. Genitalia is not studied (both known females have broken abdomens, genitalia slides are not found).

Variability. Medial line on hind wing of female may be narrow ( Fig. 21 ) or wider ( Fig. 19 ), abdomen reddish brown ( Fig. 19 ) or creamy ( Fig. 21 ).

Diagnosis. The species is endemic to Sumatra. Male is darker than S. pallida from Java and Bali, and S. jacquie sp. n. from Flores and Sumba. No clear difference in male genitalia is found between S. pallida , S. jaquie sp. n., S. gerry sp. n., S. dorsalis , and S. castanea .

Distribution ( Fig. 38 ). Sumatra.

Ecology. Adults were collected in August from the altitudes between 9 (Medan Deli) and 945 m (Parapat) within Sumatran lowland and montane rainforest ecoregions ( Dinerstein et al., 2017).

Etymology. The species is named after Gerald “Gerry” Malcolm Durrell, a well- known naturalist and writer who inspires lots of people through decades to devote their lives to studying biology.

Taxonomic note. The species is not barcoded like S. pallida and S. jacquie sp. n., but darker coloration, isolated distribution on Sumatra within distinct ecoregions, and 2.45% distance between S. pallida and S. jacquie sp. n. let us suggest that the Sumatran population is also a separate species.

Figures

Figures 14–24. Adults of Streblote ssp. 14–18. S. pallida. 14. Male, Greater Sunda Islands, Java (RBINS). 15. Male, Greater Sunda Islands, Java, genitalia slide 2022-0096, DNA GWOTL634-13 (MWM/ZSM). 16. Female, Greater Sunda Islands, Java, genitalia slide 2022-0098 (NBCL). 17. Female, holotype of Nadiasa callipaida, Lesser Sunda Islands, Bali (RBINS). 18. Female, holotype of S. castanea pallida, Lesser Sunda Islands, Bali (NHML). 19–21. S. gerry, Greater Sunda Islands, Sumatra. 19. Female (MWM/ZSM). 20. Male, genitalia slide 2022-0094 (NBCL). 21. Female (NBCL). 22–24. S. jacquie, Lesser Sunda Islands. 22. Male, paratype, Sumba (CGM). 23. Male, holotype, Flores, genitalia slide ZSM-60 (MWM/ZSM). 24. Female, paratype, Flores (NBCL). Scale bar – 1 cm.

Figures 25–31. Male genitalia of Streblote spp. 25. S. castanea, the Philippines, Palawan, genitalia slide 220630 (SMNS). 26. S. dorsalis, paratype of S. helpsi after Holloway (1987), Greater Sunda Islands, Borneo (NHML). 27. S. gerry, holotype, Greater Sunda Islands, Sumatra (NBCL). 28–29. S. pallida, Greater Sunda Islands, Java. 28. Genitalia slide 2022 0096 (MWM/ZSM). 29. Genitalia slide 2022 0097 (NBCL). 30–31. S. jacquie, Lesser Sunda Islands. 30. Paratype, Flores (RMBH). 31. Holotype, Flores (MWM/ZSM). Scale bar – 1 mm.

Figures 32–37. Eight sternites (top) and tergites (bottom) of male and female genitalia of Streblote spp. 32. S. castanea, the Philippines, Palawan, genitalia slide 220630 (SMNS). 33. S. gerry, holotype, Greater Sunda Islands, Sumatra (NBCL). 34. S. jacquie, holotype, Lesser Sunda Islands, Flores (MWM/ZSM). 35–37. S. pallida, Greater Sunda Islands, Java. 35. Genitalia slide 2022 0096 (MWM/ZSM). 36. Genitalia slide 2022 0097 (NBCL). 37. Genitalia slide 2022 0098 (NBCL). Scale bar – 1 mm.

Figures 38–40. Principal differences between S. castanea from the Philippines (gray), S. dorsalis from Borneo (blue), Streblote sp. from Belitung (yellow), Streblote sp. from Sulawesi (green), S. geraldi (purple), S. pallida (vinous) and S. jacquie (orange): 38. Distribution map (for details visit bit.ly/3qq4WRz). 39. Phylogenetic tree (NJ, Kimura-2, 1000 replicates). 40. Pairwise distances (%).