Campsurus fortuitus Cruz & Molineri & Hamada 2022, sp. nov.
Creators: name: Cruz, Paulo Vilela
name: Molineri, Carlos
name: Hamada, Neusa
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Polymitarcyidae
Campsurus
Campsurus fortuitus

description: Campsurus fortuitus sp. nov.
(Figures 2 A–I)
Material examined. Holotype: male imago (INPA) from Brazil; Amapá; Pedra Branca; Igarapé da Estrada BR 210; 0.62747 / -51.63756; 03.viii.2011; A. Pes, P. V. Cruz, A. Fernandes cols. Paratypes: One male imago (INPA), same data as holotype.
Diagnosis. Male imago. 1) sternum IX with posterior margin almost straight (Fig. 2H); 2) pedestal of each side touching basally, inner projection short, thick, almost rounded, and with outer margin straight, outer projection short, slender and with apex broadly pointed (Figs 2D and 2H); 3) base of penis wide proximally, narrowing toward apex (Figs 2D and 2H); 4) main lobe of penis bladelike, slightly curved ventrally and with distoventral gonopore (Figs 2D–I); 5) penis apex with expansion curved outwards (Figs 2D–I); 6) secondary lobe completely reduced (Figs 2D–I).
Description. Male imago. Length (n=1, mm): body, 7.8; fore wing, 5.7; hind wing, 2.4. General coloration yellowish grey (Fig. 2A). Head completely shaded with black dorsally, ventrally whitish, slightly tinged with black. Antenna with scape and pedicel grey, flagellum lost. Thorax. Pronotum shaded with gray, with paler transversal line on posterior margin; prosternum whitish, propleura whitish, shaded with gray. Mesonotum yellowish white with blackish medial line, parapsidal suture and posteroscutal protuberance slightly shaded with gray; pleura and sterna whitish, shaded with black; and gray around coxa. Metanotum yellowish. Legs. Foreleg greyish, except distal tarsomere and claws slightly paler. Middle and hind legs yellowish. Wings (Figs 2B and 2C). Fore wing with membrane hyaline, shaded with light grey on C and Sc areas; veins grey; cross veins hyaline; MP 2 not connected to IMP, ICu 1 not connected to CuA, ICu 2 directly connected to CuA. Hind wing similar to fore wing, but paler; intercalary vein of radial sector very short. Abdomen whitish translucent, shaded with gray, except medial line, intersegmental membranes, and lateral transversal dash on terga II–VII (Fig. 2A) Abdominal sterna whitish, shaded with gray on inner margin of gill sclerites and very slightly on meson of sterna VII–IX. Genitalia (Figs 2D–I): sternum IX with almost straight posterior margin; pedestal of each side touching basally, inner projection short, thick, almost rounded, and with outer margin straight, outer projection short, slender and with apex broadly pointed; base of penis wide proximally, narrowing toward apex; main lobe of penis slender, bladelike and sclerotized, slightly curved ventrally and with distoventral gonopore, inner margin of apex (Figures 2D and 2E) with expansion curved outwards (eco), secondary lobe completely reduced, apical half of penis orangish. (Caudal filaments broken off and lost)
Etymology. The word “fortuit” in Latin means “random”. The species was collected in a random stop in the road for snack.
Discussion. Campsurus fortuitus sp. nov. has unusual genital characteristics, similar to Campsurus povilla Molineri & Salles, but they can be distinguished by i) penis with wide base, narrowing distally in C. fortuitus sp. nov., while abruptly thinning basal to penile lobes in C. povilla; ii) main lobe of penis slender in C. fortuitus sp. nov., while robust in C. povilla; iii) main lobe of penis with inner margin apex curved outwards in C. fortuitus sp. nov., while apex rounded in C. povilla; iv) secondary lobe of penis completely reduced in C. fortuitus sp. nov., while greatly reduced but clearly present in C. povilla; v) pedestal in C. fortuitus sp. nov. with inner projection straighter than in C. povilla.
description: Published as part of Cruz, Paulo Vilela, Molineri, Carlos & Hamada, Neusa, 2022, Two new species and new records of Campsurus Eaton (Ephemeroptera: Polymitarcyidae) in Amazon, pp. 435-444 in Zootaxa 5100 (3) on pages 438-440, DOI: 10.11646/zootaxa.5100.3.7, http://zenodo.org/record/6201845