Campsurus nessimiani,

Molineri, Carlos & Salles, Frederico F., 2017, Review of selected species of Campsurus Eaton 1868 (Ephemeroptera: Polymitarcyidae), with description of eleven new species and a key to male imagos of the genus, Zootaxa 4300 (3), pp. 301-354: 314-317

publication ID

https://doi.org/10.11646/zootaxa.4300.3.1

publication LSID

lsid:zoobank.org:pub:554D8B46-D396-42FA-9604-6DA9DFA3EFE7

persistent identifier

http://treatment.plazi.org/id/0386A43A-EF7A-A226-8B85-FB30FAE7FDAD

treatment provided by

Plazi

scientific name

Campsurus nessimiani
status

sp. nov.

Campsurus nessimiani  sp. nov.

( Figs. 54–55View FIGURES 51 – 59, 60–67View FIGURES 60 – 67, 166View FIGURES 163 – 166)

Type material. BRAZIL: holotype ♂ i from Amazonas, Barcelos , rio Demeni  , boca do rio, 8–9.viii.2009, S 0° 25' 29" / W 62° 54' 20", pennsylvania light trapGoogleMaps  , N Hamada col. ( CZNC). Paratypes: 50 ♂ i and 4 ♂ si same data as holotype ( CZNC, except 5 ♂ i in IBN)GoogleMaps  ; 5 ♂ i from Amazonas, N. Aripuanã, Rio Juma, Ig. Campineiro Gde. , 8– 9.ix.2004, pennsylvania light trap, N Hamada col. ( CZNC)  ; 2 ♂ i from Amazonas, Manaus, Arquipélago de Anavilhanas , N 2° 40' 20" / W 60° 46' 40", 30.vii.2000, light-trap, JL Nessimian col. ( CZNC)GoogleMaps  ; 1 ♂ i same data as before except date (31.vii.2000) (IBN)GoogleMaps  ; 1 ♂ i from Roraima, Boa Vista, rio Cauamé , N 2° 49' 11" / W 60° 40' 24", 28.ii.2003, UV light trapGoogleMaps  , N Hamada col. ( CZNC); 13 nymphs (2 are pharate ♂ si) from Amazonas, Arquipélago de Anavilhanas, lago Siriri , 21.ix.1981  , JL Nessimian col. (CZNC, except 3 nymphs in IBN).

Male imago. Length (mm): body, 6.5–7.8; fore wing, 5.9–7.0; hind wing, 2.8–3.1; cerci, 16.0–18.5; fore leg, 2.9–3.5. General coloration whitish yellow ( Fig. 166View FIGURES 163 – 166). Head yellowish, completely shaded with black dorsally, except along hind margin and base of antenna ( Fig. 166View FIGURES 163 – 166). Antennae yellowish white, shaded with gray. Thorax ( Fig. 166View FIGURES 163 – 166). Pronotum translucent, anterior portion completely shaded with gray, except on anterior hump; posterior pronotal portion translucent, shaded with gray medially and on lateral zones; posterior margin grayish; transversal pale stripe between both portions; blackish longitudinal medial line present along both portions; prosternum and propleura pale, almost without shading. Mesonotum yellowish, shaded with black on thin blackish medial line, and shaded diffusely with gray almost completely but darker on parapsidal sutures and between PSP; pleura yellowish, shaded with black on area around spiracle and above coxa continuing to PLsS (superior pleural suture); sternum shaded with gray widely but slightly; inner margins of PFP grayish; metanotum yellowish, shaded widely with gray except pale anterolateral mark; metasternum yellowish translucent shaded with gray on medial marks. Legs. Fore leg yellowish white, shaded completely with purplish gray except pale lateral stripe on coxa, slightly paler at base of tarsomeres and apex of claws; middle and hind legs yellowish translucent, shaded very slightly with gray. Wings. Membrane hyaline except C, Sc, R1 areas shaded with gray; veins C through MA (and cross veins therein) shaded gray, darker on basal 2/3 of veins C, Sc and R1, lighter toward apex; other veins shaded gray only at base, rest translucent. Hind wing with base and Sc grayish, remaining veins translucent. Abdomen whitish translucent, shaded widely with gray on terga ( Fig. 166View FIGURES 163 – 166) except on intersegmental membranes and pale lateromedian dash on terga III –VII (some males also with pale mediolongitudinal line); terga VIII –X shaded more uniformly but with some pale spots and black dashes (black dashes forming anteromedian small "V" on tergum IX). Abdominal sterna yellowish white, shaded very slightly with gray on gill sclerites. Genitalia ( Figs. 54–55View FIGURES 51 – 59): sternum IX slightly shaded gray posteromedially, with truncated hind margin ( Fig. 54View FIGURES 51 – 59); pedestal of each side touching basally, with large apically rounded parastylus, inner corner also projected and round ( Figs. 54–55View FIGURES 51 – 59); forceps short and whitish; base of penes wide proximally, abruptly narrowing at distal half; main lobe of penes large and sclerotized, slightly curved ventrally and with apex spatulate, secondary membranous lobe large and conical. Caudal filaments translucent yellowish white.

Mature nymph. Length of male (mm): body, 8.0–9.0; cerci, 6.0; terminal filament 5.5. Head with frons completely covered with long setae, also on straight anterior margin, only one small blunt tubercle at base of antennae, another small blunt tubercle on anterolateral corner of frons (t in Fig. 60View FIGURES 60 – 67), anterior half of gena protruded and covered with very long, strong setae, posterior half of gena bare, except for small tubercle before eye also covered with very long, strong setae ( Fig. 60View FIGURES 60 – 67); inner margin of compound eye with a pair of setae anteriorly and another pair posteriorly. Antenna ( Fig. 60View FIGURES 60 – 67): pedicel almost twice as long as scape, dorsally covered with very long, strong setae; scape with few short setae; flagellum almost twice length of head capsule, scattered with very short, weak setae. Mandibular tusk ( Figs. 61–63View FIGURES 60 – 67) relatively long and slender, apex slightly curved inward; exposed area 0.5–0.6× length of head capsule; dorsal surface with numerous very long, strong setae; dorsal surface with group of 8–15 strong blade-like spines at base (bs in Fig. 62View FIGURES 60 – 67); outer margin covered with long setae and 28–34 strong bladelike spines (distally in single row, basally in double but scattered row); inner margin with 7–9 (left mandible) or 9– 11 (right mandible) small tubercles (becoming smaller toward apex), some alternating with short strong setae ( Figs. 61–63View FIGURES 60 – 67), these tubercles ordered in more or less straight row; ventral surface with many fewer setae than dorsum, only along outer margin. Maxilla without ventral gill. Thorax. Posterolateral corner of pronotum and propleura without strong setae; metasternum completely covered with strong setae. Legs ( Figs. 64–67View FIGURES 60 – 67). Femora of all legs relatively slender. Fore legs with coxa and trochanter bare; dorsal surface of femur ( Fig. 64View FIGURES 60 – 67) with outer subdistal row of setae, and subbasal group of long setae on inner margin, venter of fore femur ( Fig. 65View FIGURES 60 – 67) with group of filtering setae at base; tibia-tarsus with margins slightly curved, dorsal surface almost completely covered with short spines and long setae ( Fig. 64View FIGURES 60 – 67), ventral surface with 2 rows of filtering setae ( Fig. 65View FIGURES 60 – 67): basal transversal Wshaped row extending along ventral surface and hind margin, and U-shaped longitudinal row along fore margin; tibia-tarsus distally cleft, not strongly projected; tarsal claw apically curved and with row of about 20–25 minute denticles. Middle leg ( Fig. 66View FIGURES 60 – 67) with coxa and trochanter with setae; dorsal surface of femur covered with relatively few long setae, mainly along margins, ventral surface bare, except apex with row of long curved setae; tibia with anterior margin distally projected and with crown of strong spines, posterior margin completely covered with very long setae, anterior margin basally bare, distal 1/3 densely covered with thick, yellowish setae; tarsus, except for absence of crown of spines, similar in setation to tibia; tarsal claw long and slender, slightly curved when compared to fore tarsal claw, with row of 30–35 minute denticles. Hind leg ( Fig. 67View FIGURES 60 – 67) similar to middle leg, except for absence of crown of spines on tibia, dorsal surface of femur almost completely covered with weak setae and tarsal claw with row of 20–25 minute denticles. Abdomen. Lateral margins of all segments with row of long setae. Sterna I – VIII with few long setae on hind margin, sternum IX with medial row of long setae. Gills. Abdominal gill I bilobed, dorsal lamella almost 3× width and 1.3× length of ventral lamella. Cercus 0.7× length of body, covered with setae dorsally and ventrally, setae more numerous and longer on outer margin, decreasing in length and number toward apex. Terminal filament at least 0.6× length of body (broken at apex), more slender than cercus, covered completely with long, scattered setae.

Etymology. We are pleased to dedicate this species after Jorge Luis Nessimian, who collected much of the material studied in this work.

Distribution ( Fig. 179View FIGURES 179). Brazil (Amazonas, Roraima).

Diagnosis. Campsurus nessimiani  can be distinguished from other species of Campsurus  , in the adult stage, by: 1) posterior margin of male abdominal sternum IX truncate ( Fig. 54View FIGURES 51 – 59); 2) pedestals of each side almost touching basally, long and slender, well-developed, outer-posterior margin strongly projected forming long parastylus with rounded apex, inner margin also projected but shorter ( Fig. 54View FIGURES 51 – 59); 3) penes separated and converging distally, each arm formed by large dorsal sclerotized lobe with wide base, and relatively large ventral and apically rounded membranous lobe ( Fig. 54View FIGURES 51 – 59), apex of main lobe of penes spatulate ( Fig. 55View FIGURES 51 – 59); 4) small size (length of male fore wings 5.9–7.0 mm). In the nymph: 1) small single tubercle at base of antenna (t in Fig. 60View FIGURES 60 – 67), scape and pedicel with setae; 2) pre-ocular group of setae on gena arise from a slightly elevated area, inner margin of compound eye without row of long setae ( Fig. 60View FIGURES 60 – 67); 3) mandibular tusks ( Figs. 61–63View FIGURES 60 – 67) with apex slightly curved inwards, inner margin with 7– 11 small tubercles becoming smaller toward apex, outer margin with 28–34 strong, blade-like spines and long setae; 4) fore femur slender (max. width 0.36× max. length), fore tibia with slightly sinuous margins ( Figs. 64–65View FIGURES 60 – 67); 5) tarsal claws with a single row of 20–35 minute denticles.

Discussion. Campsurus nessimiani  is very similar to C. cuyuniensis  , C. dasilvai  sp. nov. and C. zunigae  sp. nov., but the male adults of C. nessimiani  can be distinguished because they present long forceps (as in other species, except C. cuyuniensis  with forceps as short as pedestals), they have a black mediolongitudinal line on pronotum (absent in C. dasilvai  sp. nov.); the main lobe of penes of C. nessimiani  ends in a spatulate structure (acutely pointed in C. dasilvai  sp. nov.), and the parastylus is apically rounded (pointed in C. cuyuniensis  and C. dasilvai  sp. nov., in lateral view). The nymphs of C. nessimiani  are similar to C. zunigae  sp. nov., but they can be distinguished by: mandibular tusks with a group of 8–15 strong blade-like spines dorsally at base (bs in Fig. 62View FIGURES 60 – 67, spines absent or reduced in C. zunigae  sp. nov.), inner margin with 7–11 small tubercles in a more or less straight row (14–15 in a curved row in C. zunigae  sp. nov.), posterolateral corner of pronotum and propleura without strong setae (with seta in C. zunigae  sp. nov.), fore legs with coxa and trochanter bare (coxa with setae in C. zunigae  sp. nov.), tarsal claw only with minute denticles (apical denticles are larger than the others in C. zunigae  sp. nov.).

PSP

Parasitic Seed Plants