Pedicelliops capillifer gen. et, 2020

Kaltenbach, Thomas & Gattolliat, Jean-Luc, 2020, Pedicelliops gen. nov., a new genus from West Africa with striking antennae (Ephemeroptera, Baetidae), African Invertebrates 61 (2), pp. 119-135 : 119

publication ID	https://dx.doi.org/10.3897/afrinvertebr.61.59354
publication LSID	lsid:zoobank.org:pub:C984D926-DA6C-40F1-BF37-33D0955B7885
persistent identifier	https://treatment.plazi.org/id/1A749009-4120-46F5-B79A-DEACAC30AF56
taxon LSID	lsid:zoobank.org:act:1A749009-4120-46F5-B79A-DEACAC30AF56
treatment provided by	African Invertebrates by Pensoft
scientific name	Pedicelliops capillifer gen. et
status	sp. nov.

Treatment

Pedicelliops capillifer gen. et sp. nov. Figures 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4 , 5 View Figure 5 , 6 View Figure 6 , 7 View Figure 7

Diagnosis.

Larva. As the genus is monospecific, it is difficult to propose a relevant specific diagnosis. We can presume specific differences in the shape of the labial and maxillary palps, and in the setation of the forefemur. Species with less derived characters (shape of the pedicel, reduction of the labrum) may also be expected.

Etymology.

With reference to the remarkable setation found ventrally on the glossae and paraglossae, and on the femora.

Type-material.

Holotype. Guinea • larva; Bas. Niger, River Niandan, Loc. Sassambaya; ca. 400 m; 25.i.1985; leg. J.-M. Elouard; on slides; GBIFCH 00592365, GBIFCH 00592366; thorax and abdomen in alcohol; GBIFCH 00515518; MZL. Paratype. Guinea • larva; Boussoulé, Milo River; ca. 360 m; 14.iv.1987; leg. J.-M. Elouard; on slides; GBIFCH 00592319, GBIFCH 00592320; MZL.

Description.

Larva. (Figs 1 View Figure 1 - 6 View Figure 6 ). Body length 5.2 mm.

Colouration (Fig. 1a-d View Figure 1 ). Colouration strongly altered due to long term storage of the larvae in alcohol, with the cuticle becoming transparent. Head, thorax and abdomen dorsally brown, fore protoptera ecru. Head, thorax and abdomen light brown ventrally. Legs and caudalii light brown.

Head. Antenna (Fig. 3a, b View Figure 3 ). Short, ca. 2/3 of head length. Pedicellus bilaterally strongly enlarged and distally elongate on both sides. Scapus and pedicellus laterally with ovoid scales.

Labrum (Fig. 4a View Figure 4 ). Length 0.6 × maximum width. Distal margin with medial emargination and a small, square process. Dorsal surface with long, stout, simple setae, erratically distributed in distal part, not arranged in one arc. Ventrally with marginal row of setae composed of anterolateral long, simple setae and medial long, bifid setae. Ventral surface with ca. three short, spine-like setae near lateral margin.

Right mandible (Fig. 4b, c View Figure 4 ). Incisor with four denticles; kinetodontium with three denticles. Margin between prostheca and mola straight; with setae along whole margin from prostheca to mola, shorter than 1/5 of prostheca. Tuft of setae present at apex of mola.

Left mandible (Fig. 4d-f View Figure 4 ). Incisor with five denticles; kinetodontium with three denticles. Margin between prostheca and mola straight; with setae along whole margin, shorter than 1/5 of prostheca, and a minute denticle toward subtriangular process. Subtriangular process long and slender, above level of area between prostheca and mola. Tuft of setae present at apex of mola.

Both mandibles with lateral margins convex. Basal half laterally with small, spatulate setae.

Hypopharynx and superlinguae (Fig. 4g View Figure 4 ). Lingua longer than wide and longer than superlinguae; with well-developed medial tuft of stout setae. Superlinguae distally rounded, lateral margins straight; long, fine, simple setae along distal margin.

Maxilla (Fig. 4h View Figure 4 ). Galea-lacinia ventrally with two simple, apical setae under canines. Medially with one spine-like seta and two short, simple setae. Maxillary palp ca. 1.3 × as long as length of galea-lacinia; palp segment II 1.3 × length of segment I; segment I widening in distal part; short, fine, simple setae scattered over distal part of surface of segment II; segment I laterally with short, robust setae; apex of segment II laterally pointed.

Labium (Fig. 4i, j View Figure 4 ). Inner margin of glossa with a row of short, fine, simple setae; ventral surface with a row of long, fine, simple setae close to margin; apex with six long, robust setae, curved toward inner side, and two shorter, spine-like setae; outer margin bare. Paraglossa with outer margin and apex convex and inner margin concave, slightly curved inward; ventrally with three rows of long, robust setae in apical area, four short, fine, simple setae in anteromedial area and a row of four long, simple setae on margin; dorsally with a row of six long, spine-like setae near inner margin. Labial palp with segment I 0.9 × length of segments II and III combined. Segment I with few short, fine, simple setae ventrally. Segment II with slender, distolateral protuberance, directed distad; distomedial protuberance 0.3 × width of base of segment III; ventral surface with short, fine, simple setae; dorsally without spine-like setae near outer margin. Segment III conical; length 0.8 × width; ventrally covered with short, spine-like setae and short, fine, simple setae.

Thorax. Fore protoptera (Fig. 2a, b View Figure 2 ). With a protuberance near inner margin.

Hind protoptera. Absent.

Foreleg (Figs 5a-c View Figure 5 , 6a View Figure 6 ). Ratio of foreleg segments 1.4: 1.0: 0.8: 0.4. Femur. Broad, length ca. 2 × maximum width. With many long, simple setae on dorsal and ventral margins as well as on anterior and posterior surface; length of setae mostly ca. 0.6 × maximum width of femur; femoral patch absent. Tibia. Dorsal margin bare; with a row of medium, spine-like setae along ventral margin; one medium, spine-like seta at distomedial margin. Patellotibial suture absent. Tarsus. Dorsal and ventral margins bare, with short to medium, spine-like setae scattered over surface. Claw robust and distally pointed, with two divergent rows of denticles; denticles with different sizes, two apical denticles clearly larger than other denticles; subapical setae absent (Fig. 2b View Figure 2 ).

Middle and hind leg (Figs 5d, e View Figure 5 , 6b, c View Figure 6 ). Ratio of middle and hind leg segments 1.2: 1.0: 0.6: 0.3. Femur. Length ca. 3 × maximum width. With same setation as foreleg; femoral patch absent. Tibia. Dorsal margin bare. Ventral margin margin with a row of short, spine-like setae. Patellotibial suture present on basal ½ area. Tarsus. Dorsal margin bare. Ventral margin with a row of short, spine-like setae. Claw as foreleg.

Abdomen. Gills (Fig. 3c, d View Figure 3 ). Seven pairs of gills on segments I-VII. Margin undulated, with short, stout, curved setae. Tracheae partly extending from main trunk to inner and outer margins. Gill I as long as the length of segments II and 2/3 of III combined. Gills II-VII unknown.

Paraproct (Fig. 3e View Figure 3 ). With nine stout, marginal spines. Surface scattered with micropores. Cercotractor with convex margin and a few minute, marginal spines.

Distribution.

West Africa: Guinea (Fig. 7 View Figure 7 ).