Parastasia spinosa Hongsuwong, Jaitrong & Sanguansub,

Hongsuwong, Thitipong & Phothaworn, Chayaphol, 2025, Notes on the Genus Parastasia Westwood, 1841 from Thailand (Coleoptera: Scarabaeidae, Rutelinae), Fragmenta entomologica 57 (1), pp. 91-102 : 97-100

Parastasia spinosa Hongsuwong, Jaitrong & Sanguansub,

2022 แมลงนูนสีชาดจันทบูร

Parastasia spinosa Hongsuwong, Jaitrong & Sanguansub, 2022: 548 , figs 1–16 (original description; type locality: Soi Dao , Chanthaburi).

Hongsuwong & Phothaworn

Parastasia selangorica Kuijten, 1992 ; Hongsuwong et al., 2020: table 1 (misidentification).

Remarks and distribution. P. selangorica Kuijten, 1992 was originally described from Malaysia and later reported in North and East Thailand ( Wada 2015; Hongsuwong et al. 2020). However, a specimen from East Thailand was subsequently reidentified as P. spinosa ( Hongsuwong et al. 2022) . The occurrence of P. selangorica in North Thailand seems improbable, as there are no records of it being found in the regions between Malaysia and North Thailand. Consequently, we have decided not to include P. selangorica in this list of Thai species.

Parastasia sulcipennis Gestro, 1888 แมลงนูนนวลแดง (Figs 18–19, 24–27, 36–38)

Parastasia sulcipennis Gestro, 1888: 113 (original description; type Locality: Teinzo, Burma); Ohaus 1900: 251 ( P. rufopicta group); Arrow 1917: 43, figs 11–12 (re-description, habitus); Ohaus 1918: 35 ( P. canaliculata group); Ohaus 1934: 103 ( P. canaliculata group); Machatschke 1972: 43 (catalog); Kuijten 1992: 152, figs 247–249 (re-description, key, parameres); Ek-Amnuay 2008: 194, fig. S56 (habitus); Hongsuwong et al. 2020: table 1 (listing); Hongsuwong et al. 2022: Figs 55, 65–66, 70 (habitus and male genitalia).

Material examined: Thailand: Chiang Rai Prov., Wiang Pa Pao Dist. , W. Pathomwattananurak leg., 7. VI .2019, 3♂♂ ( CTH and THNHM) ; Chiang Rai Prov., Wiang Pa Pao Dist. , local collector leg., 11. V .2023, 9♂♂ ( CTH and THNHM) ; Chiang Mai Prov., Mueang Dist., Chang Pueak Subdist., near Doi Suthep , 18°81′43.7″N, 98°95′66.4″ E, S. Sribundit leg., 25. V .2024, 1♀ ( CTH) ; Phetchabun Prov., Lom Kao Dist. , local collector leg., 25. V .2024, 1♂ ( CWP) .

Remarks and distribution. Kuijten (1992) provided specimens with localities in India, Bangladesh, Myanmar, Laos, and North–Northeast Thailand. The male specimens in this study were all collected at elevations above 800 m during the day, while a female specimen was discovered in a lowland area (below 100 m).

Parastasia westwoodii Westwood, 1841 แมลงนูนขาโตสี ตาลไหม้

(Figs 32–35, 42–44, 48–49)

Parastasia westwoodii Westwood, 1841: 35 (original description; type Locality: Sumatra); Westwood 1842: 304 (description); Burmeister 1844: 374 (re-description); Westwood 1845: 96, Plate VI, fig. 1 (re-description); Kuijten 1992: 164, figs 261–265 (re-description, key, parameres); Hongsuwong et al. 2020: table 1 (listing); Hongsuwong et al. 2022: fig. 53 (female habitus).

Parastasia westwoodi ; Ohaus 1898: 10 (misspelling, P. bicolor group); Arrow 1899: 495 (misspelling, re-description); Ohaus 1900: 252 (misspelling, P. marginata group); Ohaus 1918: 36 (misspelling, P. westwoodii group); Ohaus 1934: 104 (misspelling, P. westwoodii group); Machatschke 1972: 44 (misspelling, catalog).

Parastasia obscura Guerin-Méneville, 1843: 39 [original description; synonym of Parastasia westwoodii by ( Kuijten 1992: 164)].

Parastasia sordida Sharp, 1881: 241 [original description; synonym of Parastasia westwoodii by Ohaus (1898: 10)].

Material examined: Thailand: Nakhon Si Thammarat Prov., Phrom Khiri Dist. , Phrom Lok Subdist., C. Phothaworn leg., 12.XI.2021, larval instar 3 in rotten log, 21.XI.2021, emerged, 1♀ ( CTH) .

Remarks and distribution. Apart from Malaysia, Indonesia, and the Philippines, Kuijten (1992) recorded this species once in Thailand, although he did not specify the precise locality. A specimen used in this study was collected from a red rotting log from South Thailand while in the larval stage and emerged as an adult in November (Figs 48–49).