The Leptophlebiidae of New Guinea (Ephemeroptera, Choroterpinae, Thraulini)AuthorSartori, Michel0000-0003-3397-3397Naturéum, Department of zoology, Palais de Rumine, Place Riponne 6, CH- 1005 Lausanne, Switzerland & Department of Ecology and Evolution, Biophore, University of Lausanne, CH- 1015 Lausanne, SwitzerlandAuthorSalles, Frederico F.0000-0001-8331-5929Museu de Entomologia, Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, BraziltextZooKeys20252025-07-15124541175journal article31105710.3897/zookeys.1245.141723b40ce71f-6729-422a-8a33-e611ca9261157160C34D-C437-4469-9A47-91AB5B9DFB05Thraulus
(
Thraulus
)
eloisaesp. nov.Figs 2 A
,
3
,
4
,
34 AMaterial examined.Holotype
.
•
Papua New Guinea
,
nymph
on slide,
Eastern Highlands Province
,
Marawaka
,
Ande
,
1700–1800 m
,
09.XI.2006
,
07°01.697'S
,
145°49.807'E
,
M. Balke
and
Kinibel
col [PNG 87],
GBIFCH 01223087
(
ZSM
)
.
Paratypes
.
3 nymphs
in ethanol,
GBIFCH 01523471
,
2 nymphs
entirely mounted on slide,
GBIFCH 01223090
,
GBIFCH 01223089
, same data as holotype (
MZL
)
. •
Papua New Guinea
,
1 nymph
mounted on slide,
GBIFCH 01223088
,
Central Province
,
Woitape
,
1500 m
,
I.2008
,
08°33.178'S
,
147°15.481'E
,
Posman
col [PNG 167] (
MZL
)
.
Nymph.
Body length, male:
6–6.5 mm
; female:
7–7.5 mm
.
Diagnosis.Labrum rectangular, with emargination shallow; proximo-lateral margin of stipes with a single long and stout seta; maxillary palp greatly elongated; outer margin of maxillary palp segment II without stout setae; inner margin of labial palp segment I with 16–18 stout setae; apex of superlingua truncate. Gills II – VI completely fringed with filaments, with ~ 30 filaments on dorsal lamella and ~ 40 on ventral lamella; posterior margin of abdominal segment VIII without denticles; posterolateral projections of the abdomen present on segments VIII – IX.Colouration.Head
yellowish, greyish between ocelli. Antenna yellowish. Compound eye lower portion black, upper portion brownish orange. Mouth parts pale brown.
Thorax
.
Pronotum pale brown, with greyish areas laterally and medially as in Fig.
2 A
. Mesonotum greyish brown with scattered lighter maculae. Femur fore femur greyish, mid- and hind femur whitish, distal 1 / 3 washed with grey. Tibia yellowish orange, with apical macula greyish. Tarsi orange to yellow.
Abdomen
.
Terga evenly greyish brown, lighter along the sagittal line. Sterna pale brown. Gills pale brown to greyish brown. Terminal filaments uniformly pale brown.
Habitus of
A.Thraulus
(
Thraulus
)
eloisaesp. nov.
and
B.Thraulus
(
Thraulus
)
grantisp. nov.
Scale bars: 1 mm.
Description.Head
.
Labrum
rectangular (Fig.
3 A
). Ratio labrum width / clypeus width 0.87–0.90. Ratio labrum width / insertion width 1.08–1.10. Medial emargination shallow with rounded denticles (Fig.
3 B
). Proximal row of setae present, simple. Number of setae on proximal row ~ 75–100. Distal row of setae present, simple. Median part of labrum in ventral view with stout setae in row (Fig.
3 B
).
Mandibles
.
Outer margin with row of setae on distal 2 / 3. Ending of the row before incisor. Right mandible with 10 or 11 setae below the mola (Fig.
3 C
).
Maxillae
.
Posterior margin of cardo with few long hair-like setae, together with some long and stout setae (Fig.
34 A
). Proximo-lateral margin of stipes with a single long and stout seta. Apical-ventral row with 15–18 pectinate setae. Maxillary palp 1.5 × longer than maxilla; maxillary palp segment II 1.17–1.39 × as long as segment I. Maxillary palp segment III 0.77–0.94 as long as segment I (Fig.
3 D
). Few stout setae on outer margin of segment I. Segment II inner margin with one stout seta. Segment II outer margin without stout setae. Segment III inner margin with three or four stout setae, dorsal surface fully covered with setae, 2.57–2.64 × as long as base width.
Labium
.
Labial palp segment II 0.59–0.71 as long as segment I. Labial palp segment III 0.64–0.71 as long as segment I (Fig.
3 E
). Segment I inner margin with 16–18 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 or seven stout setae (Fig.
3 F
), 2.00–2.43 × as long as base width.
Hypopharynx
apex of superlingua truncate.
Thraulus
(
Thraulus
)
eloisaesp. nov.
nymphal mouthparts.
A.
Labrum, dorsal view;
B.
Emargination of the labrum;
C.
Right mandible;
D.
Maxilla;
E.
Labium;
F.
Labial palp, segment III. Scale bars: 200 µm (
A, C – E
); 50 µm (
B, F
).
Thorax
.
Dorsal margin of femur with a row of long, stout, pointed setae; submarginal row with setae as long as those of dorsal margin (Fig.
4 A
); ventral margin with short, blunt, stout setae and a submarginal row of long, pointed, stout setae, except on hind leg where they are short and blunt (Fig.
4 B
); central area of upper surface with few long pointed setae. Fore tibia with several rows of numerous simple feathered setae on ventral margin; outer margin with few hair-like setae; middle tibia with two rows of long pointed setae on ventral margin, outer margin with few hair-like setae; hind tibia with a row of long thin setae on ventral margin, upper and lower surfaces covered with simple and some feathered setae, outer margin with short and long, pointed, stout setae. Tarsal claw straight with 5–8 minutes denticles subequal in length (Fig.
4 C
).
Thraulus
(
Thraulus
)
eloisaesp. nov.
thorax and abdomen.
A.
Fore femur;
B.
Hind femur;
C.
Claw;
D.
Posterior margin of tergite IX;
E.
Gill IV;
F.
Gill VII. Scale bars: 200 µm (
A, B
); 50 µm (
C, D
).
Abdomen
.
Gill I with single bifid lamella. Gills II to VII with dorsal and ventral lamellae, ventral lamella smaller. Gills II – VI with upper lamella lacking filaments on basal half of outer margin, with ~ 25–30 short filaments, lower lamella with ~ 35–40 short filaments (Fig.
4 E
); on both lamellae apical filament much longer than the others; gill VII small, with narrow lamellae ending with a single filament (Fig.
4 F
). Posterior margin of terga IX with denticles (Fig.
4 D
). Posterior margin of terga V – VIII without denticles. Posterolateral projections present on segments VIII and IX.
Derivatio nominis.This species is dedicated to Eloïse Sartori, daughter of the first author.