Thraulus (Thraulus) wemale, Sartori & Salles, 2025

Sartori, Michel & Salles, Frederico F., 2025, The Leptophlebiidae of New Guinea (Ephemeroptera, Choroterpinae, Thraulini), ZooKeys 1245, pp. 41-175 : 41-175

publication ID	https://doi.org/10.3897/zookeys.1245.141723
publication LSID	lsid:zoobank.org:pub:7160C34D-C437-4469-9A47-91AB5B9DFB05
DOI	https://doi.org/10.5281/zenodo.15923155
persistent identifier	https://treatment.plazi.org/id/0082BB0C-EE8F-526C-B02C-82AC58D055F4
treatment provided by	ZooKeys by Pensoft
scientific name	Thraulus (Thraulus) wemale
status	sp. nov.

Treatment

Thraulus (Thraulus) wemale sp. nov.

Figs 11 C View Figure 11 , 18 View Figure 18 , 19 View Figure 19 , 20 E, F View Figure 20

Material examined.

Holotype. • Indonesia, Maluku, Seram, nymph on slide, Kanikeh , 607 m, 7.IV.2012, 3°06.524'S / 129°28.796E, M. Balke col [AMB 07], GBIFCH 01223099 ( MZB) GoogleMaps . Paratypes. • Indonesia, Maluku, Seram, 9 nymphs in ethanol, GBIFCH 01523477 , 2 entirely mounted on slide, GBIFCH 01223105 , GBIFCH 01223102 , same data as holotype ( MZL) GoogleMaps . • Indonesia, Maluku, Seram, 1 nymph in ethanol ( UFVB), 2 entirely mounted on slide, GBIFCH 01223104 , GBIFCH 01223103 , Roho-Kanikeh village, waterholes near Roho , 117 m, 7.IV.2012, 3°01.193'S / 129°23.480'E, M. Balke col [AMB 06] ( MZL) GoogleMaps . • Indonesia, Maluku, Seram, 1 nymph entirely mounted on slide, GBIFCH 01223100 , small puddles Kanikeh-Wainsela , 800–1350 m, 9.IV.2012, 3°08.679'S / 129°28.403'E, M. Balke col [AMB 10] ( MZL) GoogleMaps . • Indonesia, Maluku, Seram, 1 nymph entirely mounted on slide, GBIFCH 01223101 , near Huahulo village , 110 m, 13.IV.2012, 2°59.069'S / 129°20.539'E, M. Balke col. [AMB 13] ( MZL) GoogleMaps . • Indonesia, Maluku, Seram, 1 nymph entirely mounted on slide, GBIFCH 01223149 , Gunung Salahutu , stream, shaded at waterfall, 125 m, 3.IV.2012, 3°33.318'S / 128°17.711'E, M. Balke col. [AMB 03] ( MZL) GoogleMaps .

Nymph.

Body length, male: 4.8–5 mm, female: 5.7–6 mm.

Diagnosis.

Labrum cordiform, medial emargination shallow with flat denticles; median part of labrum in ventral view with stout setae in a row; outer margin of mandibles with row of setae on distal 2 / 3; posterior margin of cardo with many hair-like setae and one stout long seta in submarginal position; gill lamellae on segments II – VI with <20 filaments, without filaments on basal half; posterolateral projections of the abdomen present on segments VI – IX.

Colouration.

Head. Pale brown, darker between ocelli in males, greyish brown in females. Antenna whitish. Compound eye lower portion black, upper portion reddish brown. Mouth parts pale brown to greyish brown. Thorax. Pronotum medium brown, darker in anterior part and laterally (Fig. 11 C View Figure 11 ). Mesonotum whitish brown, darker laterally, with greyish marks along the median suture. Metanotum pale brown. Femur greyish white, dorsal surface with two large dark grey marks proximally and distally. Tibia uniformly pale brown. Tarsi uniformly pale brown. Abdomen. Terga uniformly medium to dark brown, tergites IX and X paler in males. Sterna yellowish grey. Gills purplish brown. Terminal filaments uniformly pale brown.

Description.

Head. Labrum cordiform (Fig. 18 A View Figure 18 ). Ratio labrum width / clypeus width 0.96–1.03. Ratio labrum width / insertion width 1.31–1.39. Medial emargination shallow with flat denticles. Proximal row of setae present, simple. Number of setae on proximal row 33–45. Distal row of setae present, simple. Median part of labrum in ventral view with only scattered stout setae (Fig. 18 B View Figure 18 ). Mandibles. Outer margin with row of setae on distal 2 / 3 ending near incisor. Right mandible with 7–11 setae below the mola (Fig. 18 C View Figure 18 ). Maxillae. Posterior margin of cardo with many hair-like setae and one stout long seta in submarginal position. Proximo-lateral margin of stipes with a single stout long seta. Apical-ventral row with 18–23 pectinate setae. Maxillary palp segment II 0.70–1.00 × as long as segment I. Maxillary palp segment III 0.67–0.82 as long as segment 1 (Fig. 18 D View Figure 18 ). Stout setae on outer margin of segment I absent. Segment II inner margin with four or five stout setae, outer margin with 4–6 stout setae. Segment III inner margin with 4–6 stout setae, dorsal surface with few setae at apex. Segment III 1.8–2.22 × as long as base width. Labium. Labial palp segment II 0.72–0.90 as long as segment I. Labial palp segment III 0.67–0.78 as long as segment I (Fig. 18 E View Figure 18 ). Segment I inner margin with 9–13 stout setae, outer margin with 11 or 12 stout setae. Segment II outer margin with 3–5 stout setae. Segment III dorsal face with 3–5 stout setae. Segment III 3.20–3.57 × as long as base width. Hypopharynx. Apex of superlingua truncate (Fig. 18 F View Figure 18 ).

Thorax. Dorsal margin of femur with a row of stout, long setae, and a submarginal row with same setae; ventral margin with shorter and stouter setae; upper surface with few long, pointed stout setae (Fig. 19 A, B View Figure 19 ). Tarsal claw hooked with 4–7 denticles progressively larger apically (Fig. 19 C View Figure 19 ).

Abdomen. Gill I with single bifid lamella (Fig. 19 F View Figure 19 ). Gills II – VII with dorsal and ventral lamellae, dorsal lamella smaller. Gills II – VI with <10 filaments on each lamella (Fig. 19 G View Figure 19 ); gill VII with two or three filaments on each lamella (Fig. 19 H View Figure 19 ). Posterior margin of terga IX with denticles (Fig. 19 D View Figure 19 ). Posterior margin of terga VII – VIII with minute denticles (Fig. 19 E View Figure 19 ). Posterior margin of terga V – VI without denticles. Posterolateral projections present on segment VI – IX.

Eggs. General shape elongated. Size 190 μm x 75 μm. Chorionic surface smooth and uplifted compared to attachment structures. Attachment structures composed of 12 long and slender filaments attached to each pole and able to inflate (Fig. 20 E View Figure 20 ). At the micropyle opening, presence of two transverse short filaments, easily broken (Fig. 20 F View Figure 20 ). Micropyle in equatorial position.

Derivatio nominis.

This species is named to honour the ancient ethnic group Wemale, who still inhabits the inland of Seram where the specimens of this species were collected and is a noun in apposition.