Papuanatula ( Fijifiliola ) flowersi, Kaltenbach, 2025

Kaltenbach, Thomas, 2025, Mayflies of the Fiji Islands (Ephemeroptera), ZooKeys 1259, pp. 205-276 : 205-276

publication ID	https://doi.org/10.3897/zookeys.1259.168521
publication LSID	lsid:zoobank.org:pub:48F9008F-BC5F-49BA-994A-2142AF2EAE55
DOI	https://doi.org/10.5281/zenodo.17583268
persistent identifier	https://treatment.plazi.org/id/2035864D-4490-56DC-B9FF-4955E3DE41C1
treatment provided by	ZooKeys by Pensoft
scientific name	Papuanatula ( Fijifiliola ) flowersi
status	sp. nov.

Treatment

Papuanatula ( Fijifiliola) flowersi sp. nov.

Figs 21 View Figure 21 , 22 View Figure 22 , 23 View Figure 23

Material examined.

Holotype. FIJI • larva; Viti Levu, Ba Prov., near Abaca village, Savuione Riv., close below Savuione waterfall ; 17°40'26"S, 177°33'06"E; 690 m; 24. x. 2024; leg. T. Kaltenbach; on slide; GBIFCH 01581931 ; MZL GoogleMaps . Paratypes. • 1 larva; same data as holotype; on slide; GBIFCH 01581932 ; MZL GoogleMaps • 1 larva; Viti Levu, Ba Prov., near Abaca village, Savuione Riv. ; 17°40'07"S, 177°32'31"E; 510 m; 24. x. 2024; leg. T. Kaltenbach; on slide; GBIFCH 01581952 ; MZL GoogleMaps .

Diagnosis.

Larva. Following combination of characters distinguishes P. flowersi sp. nov. from other species of Fijifiliola subgen. nov.: head orange-brown; abdomen dorsally dark brown, terga III – V partly orange-brown, X orange-brown; femur dark orange-brown; apex of hypopharynx without bifid bunch of stout setae; labial palp segment III elongate conical, inner margin straight; tergalii with orange-brown pigmentation outside tracheation; paracercus with 13 segments.

Description.

Larva (Figs 21 View Figure 21 – 23 View Figure 23 ). Body length 4.9–5.6 mm, cerci ~ 1.2 × body length.

Colouration (Fig. 21 a – c View Figure 21 ). Head orange-brown; thorax dorsally dark grey-brown with indistinct grey pattern, fore protoptera grey; abdomen dorsally dark brown, terga III – V partly orange-brown, X orange-brown. Legs mainly orange-brown, femur apically dark brown. Thorax and abdomen ventrally dark grey, segment X orange-brown. Caudalii orange-brown.

Head. Antenna (Fig. 22 h View Figure 22 ). Length ~ 1.5 × head length. As typical for subgenus.

Labrum (Fig. 22 a, b View Figure 22 ). Length 0.7 × maximum width. Otherwise, as typical for subgenus.

Right mandible (Fig. 22 f View Figure 22 ). Margin between prostheca and mola straight, smooth. Otherwise, as typical for subgenus.

Left mandible (Fig. 22 e View Figure 22 ). Margin between prostheca and mola straight, with few minute denticles toward subtriangular process. Subtriangular process short. Otherwise, as typical for subgenus.

Hypopharynx and superlinguae (Fig. 22 d View Figure 22 ). Apex of lingua without bifid bunch of stout setae. Otherwise, as typical for subgenus.

Maxilla (Fig. 22 g View Figure 22 ). Maxillary palp approx. as long as galea-lacinia; palp segment II ~ 0.9 × length of segment I. Otherwise, as typical for subgenus.

Labium (Fig. 22 c View Figure 22 ). Paraglossa with two spine-like setae on inner, distolateral margin. Labial palp with segment I ~ 0.8 × length of segments II and III combined. Segment II dorsally with row of five or six spine-like setae near outer, distolateral margin. Segment III elongate conical, 0.5 × length of segment II, inner margin straight, outer margin convex. Otherwise, as typical for subgenus.

Legs (Fig. 23 a – e View Figure 23 ). Ratio of leg segments: fore leg 1.0: 1.0: 0.5: 0.2, middle leg 1.0: 1.0: 0.4: 0.2 and hind leg 1.0: 1.0: 0.4: 0.2. Femur. Length ~ 2.5 × maximum width. Tibia. With row of short, blunt setae on each side parallel to row of long, fine, simple setae. Claw with one row of 9–12 denticles; one posterior seta. Otherwise, as typical for subgenus.

Abdomen. Terga (Fig. 23 f, g View Figure 23 ). Posterior margin of terga: I – IX with triangular, pointed denticles, becoming longer toward end of abdomen.

Tergalii (Fig. 23 i, j View Figure 23 ). Oval; tracheation mainly limited to main trunk, dark brown; with scattered, orange-brown, hypodermal pigmentation. Margin with minute denticles and short, fine, simple setae.

Paraproct (Fig. 23 h View Figure 23 ). Posterior margin with prolongation, with denticles.

Caudalii (Fig. 22 i, j View Figure 22 ). Cerci without swimming setae. Paracercus with 13 segments.

Pose of subimaginal gonostyli under larval cuticle. Unknown.

Subimago. Unknown.

Imago. Unknown.

Egg. Unknown.

Biological aspects.

Local species; larvae living in run of fast flowing, turbulent mountain rivers with pristine water (Fig. 36 d, e View Figure 36 ).

Etymology.

The species is dedicated to R. W. Flowers (formerly Florida A & M University, Tallahassee, USA), who pioneered the work on Fijian mayflies with his article dated 1990.

Distribution.

Fiji: Viti Levu (Fig. 39 e View Figure 39 ).