Kosminympha baruya, 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.15923277
persistent identifier	https://treatment.plazi.org/id/555CC751-CA2D-52E9-B746-4EF76066940C
treatment provided by	ZooKeys by Pensoft
scientific name	Kosminympha baruya
status	sp. nov.

Treatment

Kosminympha baruya sp. nov.

Figs 34 L View Figure 34 , 61 A View Figure 61 , 67 View Figure 67 , 68 View Figure 68

Material examined.

Holotype. • Papua New Guinea, nymph on slide, Central Province, Kokoda trek , 1400 m, I.2008, 09°01.952'S, 147°44.455'E, Posman col [PNG 172], GBIFCH 01223159 ( ZSM) GoogleMaps . Paratypes. • Papua New Guinea, one nymph in ethanol, GBIFCH 01523446 , same data as holotype ( MZL) GoogleMaps . • Papua New Guinea, one nymph on slide, GBIFCH 01223160 , 2 nymphs in ethanol, GBIFCH 01523445 , Gulf Province, Marawaka, Mala , 1400 m, 11.XI.2006, 07°05.664'S, 145°44.467'E, M. Balke and Kinibel col [PNG 90] ( MZL) GoogleMaps .

Nymph.

Body length, female: 8.5 mm.

Diagnosis.

Labrum cordiform; emargination narrow with pointed denticles; tarsal claw straight with nine or ten teeth; abdominal tergites predominantly medium to dark brown; posterolateral expansions present on abdominal segments VII – IX.

Colouration.

Head. Greyish brown, pale brown between antennae and front ocellus. Antenna broken. Mouth parts pale brown, labrum and mandibles dark brown. Thorax. Pronotum greyish brown, dark brown laterally and medially. Mesonotum pale brown, with greyish maculae as in Fig. 61 A View Figure 61 . Femur greyish brown, yellowish proximally and subdistally. Tibia uniformly yellowish. Tarsi uniformly yellowish. Abdomen. Terga uniformly medium brown, with pale brown dots close to gills insertion. Sterna yellowish in median part, posterior margin greyish laterally. Gills brownish purple. Terminal filaments yellowish, darker near base.

Description.

Head. Labrum cordiform (Fig. 67 A View Figure 67 ). Ratio labrum width / clypeus width 1.06–1.08. Ratio labrum width / insertion width 1.28. Medial emargination narrow with pointed denticles. Proximal row of setae present, simple. Number of setae on proximal row ~ 120–140. Distal row of setae multiple. Median part of labrum in ventral view with scattered thin setae (Fig. 67 B View Figure 67 ). Mandibles. Outer margin with row of setae on entire margin. Ending of the row near incisor. Right mandible with 14–16 setae below the mola (Fig. 67 C View Figure 67 ). Maxillae. Posterior margin of cardo with many hair-like setae. Proximo-lateral margin of stipes with a bunch of ~ 15 stout, long, pointed setae (Fig. 34 L View Figure 34 ). Apical-ventral row with 22–24 pectinate setae. Maxillary palp segment II 0.82–0.88 as long as segment I. Maxillary palp segment III 0.75–0.85 as long as segment I (Fig. 67 D View Figure 67 ). Stout setae on outer margin of segment I present. Segment II inner margin with 1–5 stout setae, outer margin with 2–7 stout setae. Segment III inner margin with four or five stout setae, dorsal surface fully covered with setae. Segment III 1.67–1.77 × as long as base width. Labium. Labial palp segment II 0.77–0.83 as long as segment I. Labial palp segment III 0.60–0.62 as long as segment I (Fig. 67 E View Figure 67 ). Segment I inner margin with 23–25 stout setae, outer margin with 33–38 stout setae. Segment II outer margin with 21–22 stout setae. Segment III dorsal face with three or four stout setae. Segment III 2.56–2.67 × as long as base width. Hypopharynx. Apex of superlingua emarginated (Fig. 67 F View Figure 67 ).

Thorax. Dorsal margin of femur with a row of very long, thin, pointed setae; irregular submarginal rows of pointed setae as long as or a little bit shorter than those on the dorsal margin, ventral margin with short, stout setae and submarginal rows of long, pointed stout setae, except on hind leg where those on ventral margin are shorter; central area of upper surface with numerous long, stout, pointed setae, shorter on hind femur (Fig. 68 A – C View Figure 68 ). Fore tibia with several rows of long simple or feathered setae on ventral margin, dorsal margin with numerous hair-like setae; middle tibia with several rows of long, simple, pointed setae on ventral margin, outer margin with numerous hair-like setae; hind tibia with several rows of simple and feathered long, stout setae on ventral margin, lower surface covered with simple and feathered setae, outer margin with short and long pointed stout setae and hair-like setae. Tarsal claw hooked with nine or ten denticles progressively larger, except distal much smaller (Fig. 68 D View Figure 68 ).

Abdomen. Gill I with both lamellae. Gills II – VII with dorsal and ventral lamellae of the same size. Gill I with nine or ten filaments on each lamella (Fig. 68 J View Figure 68 ), gills II – VI with ~ 15 filaments on each lamella (Fig. 68 L View Figure 68 ), gill VII with three or four filaments on each lamella (Fig. 68 K View Figure 68 ). Filamentous projections on apex. Posterior margin of terga VII – IX with denticles (Fig. 68 G – I View Figure 68 ). Posterior margin of terga V – VI with minute denticles (Fig. 68 E – F View Figure 68 ). Posterolateral projections present on segment VII – IX.

Derivatio nominis.

The specific name is to recognise the tribe Baruya living in the valleys of Wonemara and Marawaka, where some of the specimens come from, and is a noun in apposition.