Crassabwa ludmilae, Kluge & Gattolliat & Salles, 2017

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

publication ID

https://doi.org/10.11646/zootaxa.4350.3.1

publication LSID

lsid:zoobank.org:pub:A3F42509-91EA-48BC-8C9D-253F5C57F20D

DOI

https://doi.org/10.5281/zenodo.6045787

persistent identifier

https://treatment.plazi.org/id/7C3A878E-451A-5A32-FF74-F921FACC366C

treatment provided by

Plazi

scientific name

Crassabwa ludmilae
status

sp. n.

Crassabwa ludmilae sp. n.

( Figs 54–113 View FIGURES 51 – 55 View FIGURES 56 – 59 View FIGURES 60 – 65 View FIGURES 66 – 75 View FIGURES 76 – 83 View FIGURES 84 – 95 View FIGURES 96 – 103 View FIGURES 104 – 107 View 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 56–58 View FIGURES 56 – 59 , 62 View FIGURES 60 – 65 ); in previous larval instars, dark lines only along convex longitudinal veins (as in Figs 117–118 View FIGURES 114 – 118 ). Coloration of thorax and abdomen varies from nearly uniform ( Figs 57 View FIGURES 56 – 59 , 60 View FIGURES 60 – 65 ) to light with very contrastingly darkened posterior part of mesonotum and abdominal terga III, VI and IX ( Figs 56, 59 View 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 70 View FIGURES 66 – 75 , 77, 78, 80–81 View 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 69 View FIGURES 66 – 75 , 76, 79, 82 View FIGURES 76 – 83 ). Inner-apical projection of 2nd segment of labial palp large, sometimes nearly as large as 3rd segment ( Figs. 73–74 View FIGURES 66 – 75 , 83 View FIGURES 76 – 83 ).

Legs as characterized above [see Crassabwa (12)–(16), (19)] ( Figs 64 View FIGURES 60 – 65 , 67 View 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. 66 View FIGURES 66 – 75 , 95 View FIGURES 84 – 95 ).

Abdomen as characterized above [see Crassabwa (22)–(24)]; all scales of terga short ( Fig. 94 View FIGURES 84 – 95 ); sterna I–III without denticles, sternum IV with vestigial denticles, sterna V–IX with regular row of pointed denticles ( Fig. 104 View FIGURES 104 – 107 ). Tergalius of first pair wide, asymmetric, with anal margin more convex than costal margin ( Fig. 85 View FIGURES 84 – 95 ); in last larval instar nearly half of tergalius is bent ventrally ( Fig. 84 View FIGURES 84 – 95 ) [see Crassabwa (25)]. Tergalii II–V subequal ( Figs 85–89 View FIGURES 84 – 95 ), tergalii VI–VII gradually smaller, with anterior margin more convex ( Figs 90–91 View FIGURES 84 – 95 ). Brown band on dorsal cuticle of tergalius [see Crassabwa (26)] either narrow, invisible on background of main trachea ( Figs 92–93 View FIGURES 84 – 95 ), or absent. Tenth abdominal segment and caudalii as described above [see Crassabwa (28), (29)] ( Figs 60, 63, 65 View 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. 99 View FIGURES 96 – 103 ). Pleura and sterna of thorax light brownish with colorless membranes and certain sclerites dark brown ( Fig. 98 View 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 100–101 View 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 54–55 View 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 106–107 View 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. 106 View FIGURES 104 – 107 ). Gonovectes wide and pointed ( Fig. 107 View FIGURES 104 – 107 ).

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

Eggs ( Figs 108–113 View 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).

ZIN

Russian Academy of Sciences, Zoological Institute, Zoological Museum

MZL

Musee Zoologique

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Ephemeroptera

Family

Baetidae

Genus

Crassabwa