Thraulus (Thraulus) noe, 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.15923137
persistent identifier	https://treatment.plazi.org/id/F817B76E-7248-5635-A839-B78534428E89
treatment provided by	ZooKeys by Pensoft
scientific name	Thraulus (Thraulus) noe
status	sp. nov.

Treatment

Thraulus (Thraulus) noe sp. nov.

Figs 11 A View Figure 11 , 12 View Figure 12 , 13 View Figure 13 , 20 A View Figure 20

Material examined.

Holotype. • Papua New Guinea, nymph on slide, Central Province, Woitape , 700 m, I.2008, 8°31.290'S, 147°13.684'E, Posman col [PNG 166], GBIFCH 01223114 ( ZSM) GoogleMaps . Paratypes. • Papua New Guinea, 2 nymphs in ethanol ( UFVB), 8 nymphs in ethanol, GBIFCH 01523475 , 3 entirely mounted on slide, GBIFCH 01223113 , GBIFCH 01223112 , GBIFCH 01223111 , same data as holotype ( MZL) GoogleMaps . Other material. • Papua New Guinea, one nymph on slide, GBIFCH 01223109 , Central Province, Kokoda Trek , 1390 m, I.2008, 09°00.338'S, 147°44.252'E. Posman col [PNG 173] ( MZL) GoogleMaps . • Papua New Guinea, one nymph on slide, GBIFCH 01223110 , Eastern Highlands Province, Marawaka, Ande , 1700–1800 m, 9.XI.2006, approx. 07°01.697'S, 145°49.807'E, M. Balke & Kinibel col [PNG 87] ( MZL) GoogleMaps .

Nymph.

Body length, male: 5.1–5.2 mm Body length, female: 6.3–6.5 mm.

Diagnosis.

Labrum rectangular, with emargination narrow; proximo-lateral margin of stipes with one long and stout seta together with two small and stout setae; maxillary palp greatly elongated; outer margin of maxillary palp segment II with 1–3 stout setae; inner margin of labial palp segment I with 20–26 stout setae; apex of superlingua rounded. Gills II – VI without filaments on basal half, with ~ 15 filaments on dorsal lamella and ~ 20 on ventral lamella; posterior margin of abdominal segment VIII with minute denticles.

Colouration.

Head. Vertex greyish brown, darker between ocelli. Antenna yellowish, pedicel greyish. Compound eye lower portion black, upper portion reddish brown. Mouth parts and clypeus medium brown. Thorax. Pronotum greyish brown. Mesonotum pale brown washed with greyish brown laterally (Fig. 11 A View Figure 11 ). Metanotum dark brown. Femur: forefemur almost completely greyish brown; mid- and hind femora whitish, apical 1 / 3 brownish. Tibia yellowish, apex yellowish brown. Tarsi yellowish brown. Abdomen. Terga dark brown, posterior margin blackish. Sterna yellowish brown in females to dark brown in males. Gills purplish brown. Terminal filaments uniformly yellowish brown.

Description.

Head. Labrum rectangular (Fig. 12 A View Figure 12 ). Ratio labrum width / clypeus width 0.88–0.92. Ratio labrum width / insertion width 1.12–1.13. Medial emargination narrow with rounded denticles. Proximal row of setae present, simple. Number of setae on proximal row 69–87. Distal row of setae present, simple. Median part of labrum in ventral view with stout setae in a row (Fig. 12 B View Figure 12 ). Mandibles. Outer margin with row of setae on distal 2 / 3, row ending before incisor. Right mandible with 7–10 setae below the mola (Fig. 12 C View Figure 12 ). Maxillae. Posterior margin of cardo broken. Proximo-lateral margin of stipes with one long stout seta together with two small stout setae. Apical-ventral row with 15–17 pectinate setae. Maxillary palp extremely long, almost 2 × longer than maxilla; segment II 1.3–1.8 × as long as segment I. Maxillary palp segment III 0.77–0.99 as long as segment 1 (Fig. 12 D View Figure 12 ). Stout setae on outer margin of segment I present. Segment II inner margin with two stout setae, outer margin with 1–3 stout setae. Segment III inner margin with three or four stout setae, dorsal surface with few setae at apex. Segment III 2.46–3.00 × as long as base width. Labium. Labial palp segment II 0.67–0.71 as long as segment 1. Labial palp segment III 0.63–0.70 as long as segment 1 (Fig. 12 E View Figure 12 ). Segment I inner margin with 20–26 stout setae, outer margin with 12–15 stout setae. Segment II outer margin with two or three stout setae. Segment III dorsal face with six stout setae. Segment III 2.15–2.29 × as long as base width. Hypopharynx. Apex of superlingua rounded (Fig. 12 F View Figure 12 ).

Thorax. Dorsal margin of femur with a row of long stout setae, and a submarginal row of same setae; ventral margin with shorter and stouter setae (Fig. 13 A, B View Figure 13 ); upper surface with few long and pointed but stout setae. Tarsal claw straight with 4–7 subequal denticles (Fig. 13 C View Figure 13 ).

Abdomen. Gill I with single bifid lamella (Fig. 13 F View Figure 13 ). Gills II – VII with dorsal and ventral lamellae, dorsal lamella smaller. Gills II – VI with ~ 15 filaments on upper lamella and ~ 20 on the ventral one, filamentous projections lacking on proximal half (Fig. 13 G View Figure 13 ); gill VII with three filaments on each lamella, one much longer than the other two (Fig. 13 H View Figure 13 ). Posterior margin of terga IX with denticles (Fig. 13 D View Figure 13 ). Posterior margin of terga VIII with minute denticles (Fig. 13 E View Figure 13 ). Posterior margin of terga V – VII without denticles. Posterolateral projections present only on segment VIII – IX.

Eggs. General shape elongated. Size 190 μm × 75 μm. Chorionic surface smooth, with longitudinal ridges weakly elevated, interrupted partially in the equatorial area. No attachment structures. Micropyle in equatorial position (Fig. 20 A View Figure 20 ).

Derivatio nominis.

This species is dedicated to Noe Sartori, grandson of the first author, and is a noun in apposition.