Thalerosphyrus sinuosus Navás, 1933

Sutthacharoenthad, Waranid, Sartori, Michel & Boonsoong, Boonsatien, 2019, Integrative taxonomy of Thalerosphyrus Eatonı 1881 (Ephemeropteraı Heptageniidae) in Thailand, Journal of Natural History 53 (23), pp. 1491-1514 : 1496

publication ID	https://doi.org/ 10.1080/00222933.2019.1657513
publication LSID	lsid:zoobank.org:pub:850FB31C-2B6A-4AB2-92D5-3413B193F196
DOI	https://doi.org/10.5281/zenodo.3671300
persistent identifier	https://treatment.plazi.org/id/039CD15E-FF8B-FF93-9BBA-50D1FE7DF963
treatment provided by	Valdenar
scientific name	Thalerosphyrus sinuosus Navás, 1933
status

Treatment

Thalerosphyrus sinuosus Navás, 1933 View in CoL

( Figures 2 View Figure 2 (a–c), 6(b), 7(b), 8(a), 9(b), 10(b), 11(b))

Materials examined

THAILAND; 1 larva (on slide), Ton Sator waterfall, Phatthalung Prov., 7.195383°N, 100.071533°E, alt. 101 m, 12-III-2016, B. Boonsoong leg. ( ZMKU); GoogleMaps 4 larvae (2 on slides; 2 in ethanol), Khao Luang waterfall, Lan Sa Ka, Nakhon Si Thammarat Prov., 8.369071°N, 99.735035°E, alt. 533 m, 2-VII-2016, B. Boonsoong leg. ( ZMKU); GoogleMaps 3 larvae (1 on slide; 2 in ethanol), Boripat waterfall, Songkla Prov., 6.995033°N, 100.150933°E, alt. 171 m, 12-III -2016, B. Boonsoong leg. ( ZMKU); GoogleMaps 3 larva (1 on slide; 2 in ethanol), Ton Nga Chang , Songkla Prov., 6.949000°N, 100.235033°E, alt. 119 m, 12-III-2016, B. Boonsoong leg. ( ZMKU); GoogleMaps 1 larva (in ethanol), Huai Sat Lek , Hua Hin district, Prachuap Khiri Khan Prov., 12.635750°N, 99.509917°E, alt. 166 m., 25-II-2018, B. Booonsoong leg. ( ZMKU); GoogleMaps 2 larvae (in ethanol), Chan Ta Then waterfall, Sri Racha, Chonburi Prov., 13.242400°N, 101.044200°E, alt. 162 m, 6-VI-2018, B. Boonsoong leg. ( ZMKU); GoogleMaps 1 larva (in ethanol), Nok Ngang , Ranong Prov., 9.706066°N, 98.577366°E, alt. 11 m., 21-IV-2018, B. Booonsoong leg. ( ZMKU) GoogleMaps

Head. Labrum slightly expanded laterally, ca. 3.5 times larger than long, with rounded apexes; dorsal surface and anterior margin covered with long and thin setae. Crown of the galea-lacinia of the maxillae with ca. 22–25 comb-shaped setae. Right mandible with 7–8 fimbriate setae below the inner incisor and ca. 4–5 long simple and thin setae below the mola. Left mandible with 10–11 simple and fimbriate setae below the inner incisor and ca. 6–7 long simple and thin setae below the mola. Hypopharynx with robust lingua bearing a tuft of small setae, superlinguae densely covered with long and thin setae up to the lower part of the superlinguae. Labium with glossae rhomboid slightly concave on their inner and outer margin near apex ( Figure 6 View Figure 6 (b)).

Thorax. Pronotum slightly expanded laterally and posteriorly and basally fused to mesonotum ( Figure 2 View Figure 2 (a–b)). Femora with submarginal rows of pointed bristles on inner and outer margins, increasing in numbers from the fore to the hind leg. Bristles on dorsal surface of hind femora arrow shaped, clearly pointed ( Figure 7 View Figure 7 (b)). Hind tibia with two rows of thin setae ( Figure 8 View Figure 8 (a)) and a row of 7–8 arrow-shaped bristles in the marginal or submarginal position. Tarsal claw with 3–4 teeth ( Figure 9 View Figure 9 (b)).

Abdomen. Posterolateral expansion not developed on segment I, weakly developed on segment II, strongly developed on segment III and increasing size up to VIII and divergent with the body ( Figure 2 View Figure 2 (c)). Gill I with asymmetrical elongated and rounded plate, 2 times longer than wide ( Figure 10 View Figure 10 (b)). Gill III–VI strongly asymmetrical, wider than long. Gill VII oval and almost symmetrical with inner concave margin near apex. Posterior margin of the tergites with irregularly pointed teeth, and numerous microdenticle rows ( Figure 11 View Figure 11 (b)). Cerci whitish in proximal part, with 3–4 dark brown bands increasing size towards apex.