Crassabwa ludmilae,

Kluge, Nikita J., Gattolliat, Jean-Luc & Salles, Frederico F., 2017, Redescription of the Afrotropical genus Crassabwa Lugo-Ortiz & McCafferty 1996 (Ephemeroptera: Baetidae: Protopatellata), Zootaxa 4350 (3), pp. 401-435: 419-428

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Crassabwa ludmilae

sp. n.

Crassabwa ludmilae  sp. n.

( Figs 54–113View FIGURES 51 – 55View FIGURES 56 – 59View FIGURES 60 – 65View FIGURES 66 – 75View FIGURES 76 – 83View FIGURES 84 – 95View FIGURES 96 – 103View FIGURES 104 – 107View FIGURES 108 – 113)

Etymology. This species is named in honor of Ludmila Sheyko, who collected mature larvae of this species.

Material examined. Holotype: L-S-I ♀ {specimen [V](9)A2014}, ZAMBIA, Luangwa river near Luangwa Bridge, 15°00'S / 30°13'E, 7.VIII.2014, coll. N. Kluge & L. Sheyko ( ZIN)GoogleMaps  . Paratypes: the same locality, 2– 8.VIII.2014, coll. N. Kluge & L. Sheyko: 1 S-I ♂GoogleMaps  , 1 L-S-I♀, 1 I ♀, L/S♂, 3 larvae (ZIN). GUINEA: Loc. Sassambaya , basin of Niger, Niandan river, 02.III.1985, coll. J.- M. Elouard: 9 larvae ( MZL and CZNC)  ; Tambicola-Beyla, Loc. Beyla ( Dion-Niger ), Le Kouan river, 11.III.1988, coll. J.- M. Elouard: 1 ♀ L ( MZL); Loc. 

Diomagoudou ; basin of Senegal, Baoulé river, 10.III.1988, coll. J.- M. Elouard: 1 larva ( MZL)  . MALI: Koulikoro, Loc. Tienfala, Niger river , 20.III.1985, coll. J.- M. Elouard: 35 larvae ( MZL and CZNC)  ; same data but 26.VI.1985: 8 larvae ( MZL)  .

Descriptions. Larva. CUTICULAR COLORATION. As characterized above [see Crassabwa  (1)]. Cuticle of fore protoptera in last larval instar with dark lines along all veins: convex longitudinal veins, concave longitudinal veins and cross veins ( Figs 56–58View FIGURES 56 – 59, 62View FIGURES 60 – 65); in previous larval instars, dark lines only along convex longitudinal veins (as in Figs 117–118View FIGURES 114 – 118). Coloration of thorax and abdomen varies from nearly uniform ( Figs 57View FIGURES 56 – 59, 60View FIGURES 60 – 65) to light with very contrastingly darkened posterior part of mesonotum and abdominal terga III, VI and IX ( Figs 56, 59View FIGURES 56 – 59).

HYPODERMAL COLORATION. As characterized above [see Crassabwa  (2)]. Before molt to subimago larva gets hypodermal coloration as in imago, including red coloration of proximal parts of cerci (see below).

STRUCTURE. Head and mouth parts as characterized above [see Crassabwa  (3)–(10)]. Left mandible with dense setae between prostheca and mola; its mola proximad of distal molar projection forms 3 or 4 transverse ridges, which in dorsal or ventral view look as protuberances; fine molar processes do not form integral row, but are concentrated on tops of these protuberances ( Figs 70View FIGURES 66 – 75, 77, 78, 80–81View FIGURES 76 – 83). Right mandible with dense setae between prostheca and mola; its mola bears separate distal protuberance and 4 or 5 transverse ridges, which in dorsal or ventral view look as protuberances ( Figs 69View FIGURES 66 – 75, 76, 79, 82View FIGURES 76 – 83). Inner-apical projection of 2nd segment of labial palp large, sometimes nearly as large as 3rd segment ( Figs. 73–74View FIGURES 66 – 75, 83View FIGURES 76 – 83).

Legs as characterized above [see Crassabwa  (12)–(16), (19)] ( Figs 64View FIGURES 60 – 65, 67View FIGURES 66 – 75). Fine colorless setae forming cross row near base of tibia and dispersed along posterior side of tibia and tarsus [see Crassabwa  (14)] simple (nonbifurcate); oblique row on anterior side of tibia consists of 3 such setae. Claw relatively short, with distal portion (from distal denticle to apex) shorter than remainder part (from base to distal denticle); denticles on claw equal in two rows [see Crassabwa  (19)]: two enlarged distal denticles in posterior row as large as two enlarged distal denticles in anterior row ( Fig. 66View FIGURES 66 – 75, 95View FIGURES 84 – 95).

Abdomen as characterized above [see Crassabwa  (22)–(24)]; all scales of terga short ( Fig. 94View FIGURES 84 – 95); sterna I –III without denticles, sternum IV with vestigial denticles, sterna V –IX with regular row of pointed denticles ( Fig. 104View FIGURES 104 – 107). Tergalius of first pair wide, asymmetric, with anal margin more convex than costal margin ( Fig. 85View FIGURES 84 – 95); in last larval instar nearly half of tergalius is bent ventrally ( Fig. 84View FIGURES 84 – 95) [see Crassabwa  (25)]. Tergalii II –V subequal ( Figs 85–89View FIGURES 84 – 95), tergalii VI –VII gradually smaller, with anterior margin more convex ( Figs 90–91View FIGURES 84 – 95). Brown band on dorsal cuticle of tergalius [see Crassabwa  (26)] either narrow, invisible on background of main trachea ( Figs 92–93View FIGURES 84 – 95), or absent. Tenth abdominal segment and caudalii as described above [see Crassabwa  (28), (29)] ( Figs 60, 63, 65View FIGURES 60 – 65).

Subimago. CUTICULAR COLORATION. Head ocher with brown. Pronotum light brown. Mesonotum light brownish with colorless areas, with sutures in antero-lateral part contrastingly dark brown and with dark brown macula on posterior end of submedioscutum; parascutellum with contrasting dark brown macula on lateroposterior corner ( Fig. 99View FIGURES 96 – 103). Pleura and sterna of thorax light brownish with colorless membranes and certain sclerites dark brown ( Fig. 98View FIGURES 96 – 103). Legs light brown, fore tibiae and tarsi darker brown. Abdominal terga and sterna light brownish. Sternum IX of male subimago lighter than others; gonostyli dark brown. Cerci dark brown.

HYPODERMAL COLORATION. As in imago, but poorly visible through brown subimaginal cuticle.

Imago, male ( Figs 100–101View FIGURES 96 – 103). Head, thorax and abdomen with hypodermal coloration forming ocher, orange, red or reddish-brownish areas [see Crassabwa  (2)]. Turbinate eyes wide; facetted surface orange, bordered by thin brown line; stem orange. Thorax orange, equally dark on dorsal and ventral sides. Wings with membrane and veins colorless, as characterized above [see Crassabwa  (20), (21)] ( Figs 54–55View FIGURES 51 – 55). Legs [see Crassabwa  (17)] ocher, without dark coloration on proximal portion of tibia. Abdominal terga orange with ocher. Abdominal sterna lighter, mainly ocher, without dark lateral sigmoid marks. Cerci near base intensively colored by deep red, in remainder part colorless [see Crassabwa  (2)]. Genitals ( Figs 106–107View FIGURES 104 – 107) poorly colored, ocher. Unistyligers with median projections [see Crassabwa  (31)]. Median side of first segment of gonostylus evenly convex, without concavity, entirely covered by small spines ( Fig. 106View FIGURES 104 – 107). Gonovectes wide and pointed ( Fig. 107View FIGURES 104 – 107).

Imago, female ( Figs 96–97View FIGURES 96 – 103). Head ocher. Thorax ventrally lighter than dorsally. Coloration of legs, abdomen and cerci as in male.

Eggs ( Figs 108–113View FIGURES 108 – 113). Nearly ellipsoid, 0.15 mm length; chorion with relief characterized above [see Crassabwa  (33)].

Dimension. Fore wing length of male 7 mm.

Comparison. Larva of the new species C. ludmilae  sp. n. can be distinguished from that of C. flava  by structure of mola of left and right mandibles, presence of setae on left mandible, cuticular coloration of fore protoptera in last larval instar, non-bifurcate setae on tibiae, and wider tergalii of first pair. Imagoes of both sexes of the new species C. ludmilae  sp. n. differ from C. flava  by absence of dark coloration at bases of tibiae and absence of dark sigmoid marks on abdominal sterna. Male imaginal genitals of C. ludmilae  sp. n. differ from that of C. flava  by wider gonovectes and shape of first segment of gonostylus. Eggs of C. ludmilae  sp. n. are similar to that of C. flava  , but shorter and more gradually narrowing toward poles (i.e. ellipsoid rater than elongate-oval).


Russian Academy of Sciences, Zoological Institute, Zoological Museum


Musee Zoologique