Streblote castanea ( Swinhoe, 1892 )

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 : 17

Streblote castanea ( Swinhoe, 1892)

( Figs 1–7 , 25 , 32 , 38–40 )

Ticera castanea Swinhoe, 1892 , Catalogue of eastern and Australian Lepidoptera Heterocera in the collection of the Oxford University Museum, 1, 269. Type locality: “ Philippine Islands.” Holotype male (OUMNH).

Taxonomic note. 1. The origin of the holotype is unknown, which makes further taxonomic studies impossible. A 130 years old holotype male from OUMNH ( Fig. 1 ) has to be barcoded using a modern sequencing approach (e.g., Prosser et al., 2015) and then compared with specimens from other Philippine islands. So far, five specimens from Luzon, Mindoro, and Negros have been barcoded (p -distance ranges between 2.45 and 3.92%, Figs 38–40 ) but the species was recorded also from Panay, Cebu, Samar, and Palawan ( Zolotuhin et al., 1997), additionally, we know few specimens from Mindanao (NBCL, NSMT, MWM/ZSM). A detailed study of the external variability of males and females mentioned by Zolotuhin et al. (1997) is also necessary.

2. The species resembles very much S. dorsalis from Borneo, a genetic study is necessary to check their relationship due to the lack of significant morphologic differences.

Figures

Figures 1–13. Adults of Streblote spp. 1–7. S. castanea sensu lato, the Philippines. 1. Male, holotype (OUMNH). 2. Female, Luzon (NBCL). 3. Female, Palawan (SMNS). 2. Male, Luzon (SMNS). 5. Male, Palawan, genitalia slide 220629 (SMNS). 6. Male, Luzon (SMNS). 7. Male, Negros (SMNS). 8–10. S. dorsalis, Greater Sunda Islands, Borneo. 8. Female, holotype (NHML). 9. Male, holotype of S. helpsi (NHML). 10. Male (SNHM). 11–12. Streblote sp., Belitung. 11. Female (SMNH). 12. Male (SMNH). 13. Streblote sp., Sulawesi (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 (%).