Sangpradubina thailandica, Boonsoong, Boonsatien & Sartori, Michel, 2016

Boonsoong, Boonsatien & Sartori, Michel, 2016, Sangpradubina, an astonishing new mayfly genus from Thailand (Ephemeroptera: Leptophlebiidae: Atalophlebiinae), Zootaxa 4169 (3), pp. 587-599 : 594-598

publication ID	https://doi.org/ 10.11646/zootaxa.4169.3.11
publication LSID	lsid:zoobank.org:pub:982AADB9-A2A3-4E61-9B23-9C85BF044200
DOI	https://doi.org/10.5281/zenodo.6075152
persistent identifier	https://treatment.plazi.org/id/03C287AC-2B38-FFA4-FF36-5522FD8B1C15
treatment provided by	Plazi
scientific name	Sangpradubina thailandica
status	sp. nov.

Treatment

Sangpradubina thailandica sp. nov.

Material examined: HOLOTYPE: male imago (reared from nymph), THAILAND, Ratchaburi province, Suan Phueng district, Kaeng Som Maeo , 13 ° 24’28.1’’ N, 99 ° 16’51.9’’ E, 200 m, 30.III.2013, B. Boonsoong leg. ( ZMKU) GoogleMaps . ALLOTYPE: female imago (reared from nymph), same data as holotype ( ZMKU) GoogleMaps . PARATYPES: 8 nymphs, same data as holotype ( ZMKU) GoogleMaps ; 1 nymph on slide and 4 nymphs in ethanol, same data as holotype ( MZL) 1 nymph on slide and 7 nymphs in ethanol, 16.XI.2014, same locale as holotype ( ZMKU) GoogleMaps ; 2 nymphs, 29.XI.2014, same locale as holotype (ZMKU); 7 nymphs, 16.XI.2014, same locale as holotype (MZL); 2 male imagos (reared from nymphs), 2 female imagos (reared from nymphs), 16.XI.2014, same locale as holotype (all in ZMKU); 1 male imago (reared from nymph), 29.XI.2014, same locale as holotype (ZMKU); 1 male imago (reared from nymph), 16.XI.2014, same locale as holotype (MZL); 1 female imago (reared from nymph), 16.XI.2014, same locale as holotype (MZL).

Additional material: 3 nymphs, THAILAND, Chanthaburi province, Kaeng Hang Maeo , 1308.56’ N, 10159.20’ E, 67 m, 7.ii.2013, B. Boonsoong leg. ( ZMKU).

Description. Mature nymph ( Figs. 1–2 View FIGURES 1 – 2 , 5–6 View FIGURE 5 View FIGURE 6 ). Body length between 4.7–6.9 mm (n=5). Antennae 2 times as long as maximum width of head ( Fig. 5 View FIGURE 5 ). Mouthparts: Labrum oval with rectangular anterior emargination; width of labrum 1.3 times width of clypeus; 2 subparallel rows of dorsal setae near anterior margin, inner row composed of long setae, outer row composed of shorter setae ( Figs 7–8 View FIGURES 7 – 10 ). Left mandible with three teeth on each incisor. Left and right mandibles as Figs 12–14 View FIGURES 11 – 14 , with well-developed prostheca. Superlinguae of hypopharynx with blunt apexes and with dense row of setae on outer margin ( Fig. 9 View FIGURES 7 – 10 ). Maxillae with ca. 11–13 pectinate setae in subapical row. Segment 1 of maxillary palp subequal in length to segment 3. Length of segment 2 more than ca 1.4 times the length segment 1; apex of segment 3 with numerous long and thin setae ( Figs 15–18 View FIGURES 15 – 18 ). Labial palpi with segment 1 longer than segment 2; segment 3 subequal to segment 2 ( Fig. 10 View FIGURES 7 – 10 ), with 5 large setae on dorsal surface and many long setae in dense bunch at apex. Thorax: Legs with stout femora; femora of forelegs rather broad with dark brown marking as in Fig. 5 View FIGURE 5 , consisting of a longitudinal white stripe and dark bands around middle and apex. Coloration patterns of middle and hind legs similar to forelegs. Forelegs ( Fig. 19 View FIGURES 19 – 22 ): Femora with 2 rows of long setae on each outer margin. Tibiae with inner margins densely covered with short setae. Claws stout, curved and narrowed apically ( Fig 22 View FIGURES 19 – 22 ). Middle legs ( Fig. 20 View FIGURES 19 – 22 ) similar to forelegs, except inner margins of tibiae with scattered short setae. Hind legs ( Fig. 21 View FIGURES 19 – 22 ) similar to forelegs, except with row of short setae on outer margin of each femur. Abdomen: terga with distinctive color pattern; terga 4–9 each with median longitudinal pale line and two lateral spots; tergum 10 with two distinct spots ( Fig. 5 View FIGURE 5 ). Gills 1 single, and lanceolate; gills 2–7 similar, composed of a leaf-like dorsal lamella distally fimbriate, with slender processes, ventral lamella rectangular and larger than dorsal lamella, asymmetrical rounded process at base, projected posterodistally from base of gills. Gill 4 with ca. 10 and 12 processes on dorsal and ventral lamella, respectively; gill 7 with 4 and 9 processes, respectively. Caudal filaments (8.0 mm) with whorls of fine hair-like setae.

Male imago. Body length 5.9– 5.5 mm, fore wing 4.6–5.1 mm, hind wing 0.9–1.0 mm. Lower portion of eyes length ca 0.6 of upper portion, upper portion of eyes yellowish-brown. Scape dark-brown, pedicel brown, ocelli white with dark bases. Vertex of head and notum dark brown. Forefemur ( Fig. 28 View FIGURES 26 – 31 ) brown, shaded with dark brown medially and apically; tibiae pale, brown at bases; tarsi whitish-brown; ratios of segments in forelegs (femur, tibia, tarsus I, II, III, IV, V), 0.65: 1.00 (1.35 mm): 0.07: 0.30: 0.25: 0.13: 0.11. Middle and hind legs paler, with same markings as foreleg. Middle legs ( Fig. 29 View FIGURES 26 – 31 ): ratios of segments, 1.11: 1.00 (1.03 mm): 0.05: 0.04: 0.04: 0.04: 0.10. Hind legs ( Fig. 30 View FIGURES 26 – 31 ): ratios of segments, 1.02: 1.00 (1.20 mm): 0.05: 0.04: 0.03: 0.05: 0.10. Forewing transparent, veins of C, Sc and R yellowish-brown; vein MA forked ca. 0.6 distance from base to margin ( Fig. 26 View FIGURES 26 – 31 ). Abdomen dark brown, terga 2–9 with median longitudinal white stripe and two pale spots arising from anterior margins; all terga with brown posterior margins; tergum 10 entirely brown; terga 1–9 laterally with distinct pale spots; all sterna predominantly light, except terga 1–2 and terga 9–10 darker. Genitalia ( Figs. 32–34 View FIGURES 32 – 35 ): forceps length 0.51 mm (ratios of segments I, II, III, 1.00 (0.37 mm): 0.21: 0.16), slightly curved; first segment of forceps long and curved, slightly dilated at base, third broader than second segment. Caudal filaments 6 mm.

Female imago. Body length 4.1 mm, fore wing 3.8 mm, hind wing 0.6 mm. Body color darker than male. Vertex of head dark brown; eyes separated on meson of head by length ca 1.6 times as great as maximum width of eye (0.86 mm); ocelli white with dark base. Pronotum with dark brown pattern. Meso- and metanotum yellowishbrown. Legs brown, markings as in male imago; ratios of segments in forelegs (femur, tibia, tarsus I, II, III, IV, V), 1.04: 1.00 (0.92 mm): 0.05: 0.04: 0.03: 0.03: 0.08; ratios of segments in middle legs, 1.02: 1.00 (0.80 mm): 0.07: 0.06: 0.05: 0.04: 0.12; ratios of segments in hind legs, 1.05: 1.00 (0.76 mm): 0.05: 0.05: 0.03: 0.02: 0.10. Tarsal claws similar to male. Wings similar to male. Abdominal terga and lateral patterns similar to male. All sterna with dark-brown coloration. Subgenital plate (sternum 7) entire. Apex of sternum 9 distally rounded with small notch ( Fig. 35 View FIGURES 32 – 35 ). Caudal filaments missing.

Etymology. The species is named after the country of collection.

Biological notes. The type locality of the new genus is a headwater stream with shallow-pool habitats on the bank ( Figs. 3–4 View FIGURES 3 – 4 ). Larvae were collected from pebble substrates in silty sediments, usually together with larvae of Choroterpes (Euthraulus) trifurcata .