Parastasia species

Hongsuwong, Thitipong & Phothaworn, Chayaphol, 2025, Notes on the Genus Parastasia Westwood, 1841 from Thailand (Coleoptera: Scarabaeidae, Rutelinae), Fragmenta entomologica 57 (1), pp. 91-102 : 92-97

List of Parastasia species of Thailand

Parastasia anomala Arrow, 1899 แมลงนูนสามเหลี่ยมดำา Parastasia anomala Arrow, 1899: 495 (original description; type locality: Penang); Ohaus 1900: 252 ( P. anomala group);

Ohaus 1903: 223 (listing); Ohaus 1918: 35 ( P. anomala group); Ohaus 1932: 130 (record in Malay Peninsula); Ohaus 1934: 103 ( P. anomala group); Machatschke 1972: 43 (catalog); Kuijten 1992: 25, figs 5–7 (re-description, key, parameres); Hongsuwong et al. 2020: 10, figs 7–12 (record in Thailand, habitus and male genitalia); Hongsuwong et al. 2022: figs 52, 56, 59, 67 (habitus and male genitalia).

Remarks and distribution. The species has been reported from South Thailand, Malaysia, and Indonesia ( Hongsuwong et al. 2020).

Parastasia bigibbosa Nonfried, 1891 แมลงนูนดำาอกริ้ว Parastasia bigibbosa Nonfried, 1891: 238 (original description; type locality: Siam); Ohaus 1898: 15 ( P. confluens group); Ohaus 1918: 32 ( P. confluens group); Ohaus

1934: 100 ( P. confluens group); Machatschke 1972: 37 (catalog); Kuijten 1992: 33, Figs 21–24 (re-description, key, pronotal sculptures and parameres); Wada 2013: 8, Figs 12–21 (habitus and male genitalia); Hongsuwong et al. 2022: 554, figs 29–39 (record in Thailand, habitus and male genitalia).

Parastasia sulcicollis Ohaus, 1911: 331 [original description; synonym of P. bigibbosa by Kuijten (1992: 33)].

Subpeltonotus andamanae Ghai, Chandra & Ramamurthy, 1988: 21 , figs 1–12 [original description; generic synonym of Parastasia by Jameson & Wada (2004: 6); synonym of P. bigibbosa by Hongsuwong et al. (2022: 554)].

Remarks and distribution. According to Hongsuwong et al. (2022), P. bigibbosa was discovered in Malaysia [= Borneo Island], Thailand [= Kanchanaburi and Trat Provinces], and India [= Andamans Island]. Its current distribution appears to span from the Sundaic to the Indochinese Regions.

Parastasia bimaculata ( Guèrin-Mèneville, 1843) แมลง นูนลายแต้มคู่

(Fig. 47)

Barymorpha bimaculata Guèrin-Mèneville, 1843: 41 , pl. XI, fig. 2 (original description; type locality: Pulo Pinang, Malay Peninsula ).

Figs 6–17 – Male genitalia of Thai Parastasia , new records. 6–8, P. asahi ; 9–11, P. burmeisteri ; 12–14, P. dimidiata ; 15–17, P. kraatzi ; 6, 9, 12, 15, parameres in dorsal view; 7, 10, 13, 16, parameres in ventral view; 8, 11, 14, 17, aedeagus in lateral view.

Figs 18–23 – Head of Thai Parastasia . 18–19, P. sulcipennis ; 20–21, P. kraatzi ; 22–23, P. burmeisteri ; 18, 20, 22, dorsal view; 19, 21, 23, lateral view.

Parastasia bimaculata ; Burmeister 1844: 376 (synonym Barymorpha ); Westwood 1845: 99 (subgenus validation); Snellon van Vollenhoven 1864: 150 (listing); Ohaus 1898: 21 ( P. bimaculata group); Ohaus 1900: 232, fig. 1 ( P. bimaculata group, male genitalia); Ohaus 1914: 82 (record in Sinabang); Arrow 1917: 42 (re-description); Ohaus 1918: 33 ( P. bimaculata group); Ohaus 1926: 111 (catalog); Ohaus 1932: 130 (record in Malay Peninsula); Ohaus 1934: 101 ( P. bimaculata group); Ohaus 1935: 5 (catalog); Machatschke 1972: 40 (catalog); Kuijten 1992: 36, figs 25–29 (re-description, subspecies validation, key, parameres); Hongsuwong et al. 2022: 556, figs 40–50, 58 (record in Thailand, habitus and male genitalia).

Cyclocephala bimaculata Montrouzier, 1855: 23 [original description; synonym of Barymorpha bimaculata by Reiche (in Montrouzier 1860: 271)].

Material examined: Thailand: Trat Prov., Ko Chang Dist., Ko Chang Island , 10.II.2024, 1♀ (available images on iNaturalist ID ggll 2023) ; Nakhon Si Thammarat Prov., Khao Nan National Park , T. Methisuraphan leg. , 10.III.2008, 1♀ ( CTH) .

Remarks and distribution. New records for this beetle were recently documented from Ko Chang, Trat Province,

East Thailand (iNaturalist ID ggll 2023). Consequently, based on its distribution across India, Myanmar, East- South Thailand, Malaysia, Singapore, Indonesia, and the Philippines, its distributional range is one of the widest among Parastasia members. In Thailand, the sapro-xylophagous larvae were found in a rotten log from Nakhon Si Thammarat Province (Fig. 47).

Parastasia birmana Arrow, 1899 แมลงนูนหยักเหลือง w Parastasia birmana Arrow, 1899: 481 , pl. XVII, Figs 3–4 (original description; type locality: Burma); Ohaus 1900: 250, fig. 14 ( P. rufopicta group, male genitalia); Arrow 1917: 38 (re-description); Ohaus 1918: 35 ( P. canaliculata group); Ohaus 1934: 103 ( P. canaliculata group); Paulian 1959: 83, fig. 16 (re-description); Machatschke 1972: 42 (catalog); Kuijten 1992: 42, figs 32–33 (re-description, key, male genitalia); Zorn 2006: 277 (catalog); Ek-Amnuay 2008: 192, fig S54 (habitus); Zorn & Bezděk 2016: 357 (catalog); Zhao 2019: 248 (listing); Hongsuwong et al. 2020: table 1 (listing); Hongsuwong et al. 2022: figs 51, 61–62 (habitus and male genitalia).

Material examined: Thailand: Chiang Mai Prov., Maetang Dist., Mon Ung Kate , V. Supakan leg., 20.IV.1975, 1♂ ( THNHM) ; Nakhon Ratchasima Prov., Sakaerat En-

vironmental Research Station, S. Pongsa leg., 26.II.1969, 1♂ ( THNHM); Nakhon Ratchasima Prov., Pak Chong Dist., Khao Yai National Park , T . Jeenthong leg., 1–2. IV.2009, 4♂♂, 1♀ ( THNHM); Chanthaburi Prov. , Klung Dist., Khao Sa Bap, K. Thonglongya leg., 25.II.1967, 1♂, 1♀ ( THNHM); Trat Prov., Ko Kut Dist., Khlong Yai Ki Waterfall , T . Jeenthong leg., 17.IV.2009, 1♂ ( THNHM); Ratchaburi Prov., Suan Phueng Dist., Rabbit in the Moon Foundation, K. Jiaranaisakul leg., 2. VI .2024, 1♀ ( RBMF); Ratchaburi Prov., Khao Krachom , 13°34’53.0”N, 99°10’46.5”E , K. Jiaranaisakul leg., 4. V .2024 , 1♀ ( RBMF); 1♀ ( RBMF); Nakhon Si Thammarat Prov., Promkiri Dist., Thon Hong Subdist. , 8°55′N, 099°81′ E, C. Phothaworn leg., 21. V .2020 , 1♂ ( CTH); Phang Nga Prov., Takua Pa Dist ., 19. V.2023, 1♀ (available images on iNaturalist ID goi-tkp 2023).

Remarks and distribution. Based on its distribution across China, Vietnam, Laos, Myanmar, Thailand, and Cambodia [= Kampuchea] ( Kuijten 1992), P. birmana , the largest species of Parastasia in Thailand, is likely one of the most common Indochinese species.