Ulmeritus saopaulensis ( Traver, 1946 )

Silva, Vinícius de Assis, Pinto, Ângelo Parise & Salles, Frederico Falcão, 2022, Redescription of adults, nymphs and taxonomic notes on the Southern Brazilian mayfly Ulmeritus saopaulensis (Traver, 1946) (Ephemeroptera: Leptophlebiidae), Revista Brasileira de Entomologia (e 20220056) 66 (4), pp. 1-10 : 2-6

publication ID	https://doi.org/ 10.1590/1806-9665-RBENT-2022-0056
persistent identifier	https://treatment.plazi.org/id/03F78790-6323-FF9E-FFC8-3CFBAFE9E65C
treatment provided by	Felipe
scientific name	Ulmeritus saopaulensis ( Traver, 1946 )
status

Treatment

Ulmeritus saopaulensis ( Traver, 1946) View in CoL

Zoobank http://zoobank.org/ 1198E78C-556F-4EFC-A6DD-1817C32A3CE7 ( Figs. 1–6 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 )

Atalophlebioides são-paulense Traver, 1946: 421 ,423, 424, 426, Figs.3–6 View Figure 3 View Figure 4 View Figure 5 View Figure 6 (descriptions of imagos male holotype and female allotype, BRAZIL, São Paulo State, Bauru municipality, 4.XII.1919, C. U. Entomological Expedition in CUIC,illustrations of hind wing and genitalia of the holotype, comparison with Ulmeritoides haarupi and Ulmeritoides flavopedes).

Ulmeritus View in CoL são-paulensis ( Traver, 1946): — Traver (1956: 12, comb. nov., comparison with Ulmeritus carbonelli View in CoL ).

[ Ulmeritus (Ulmeritus) ] sao-paulense ( Traver, 1946) : — Traver (1959: 6, mention, combination implicit by the context ICZN, 1999, Art. 11.9.3 of the Code).

[ Ulmeritus View in CoL ] sao-paulense ( Traver, 1946) : — Thew (1960: 123, mention,combination implicit by the context).

Ulmeritus (Ulmeritus) saopaulensis ( Traver, 1946) View in CoL : — Hubbard (1982: 268, catalog to South America).

Ulmeritus View in CoL (U[lmeritus]) saopaulensis ( Traver, 1946) View in CoL : — Da-Silva and Pereira (1992: 855–858, Figs.1 View Figure 1 –8, description,illustrations of habitus, gills,and mouthparts of the nymph from Minas Gerais State, comparison with U. carbonelli View in CoL and

Homothraulus View in CoL misionensis [ Esben-Petersen, 1912]).

Ulmeritus saopaulensis ( Traver, 1946) View in CoL : — Domínguez (1991: 157, 160, taxonomic notes); — Domínguez (1995: 34, 35, 38, phylogenetic analysis); — Hubbard and Pescador (1999: 138, checklist to São Paulo state, Brazil); — Salles et al.

(2004: 29, catalog to Brazil); — Domínguez et al. (2006: 40, 528–529, 531,

532, catalog to South America, taxonomic review, key to nymph and imago);

— Mariano and Polegatto (2011: 594, checklist to São Paulo State); — Salles and Domínguez (2012: 51, 61, 65, phylogenetic analysis, key to nymph and imago); — Souto et al.(2016: 135, key to imago); — Campos et al.(2017: 60,62,

record to Bahia state, Brazil).

Material examined. BRAZIL. Minas Gerais State: 11 nymphs, Paula Cândido municipality, Buieié locality (-20.8738, -42.9800, 739 m a.s.l.), 17.v.2019, F.Salles and Marulanda leg.( DZUP 515219–515221 View Materials ); 3 nymphs, 6 nymphal exuviae, 2 male subimagos, 3 female subimagos, 2 male and 9 female imagos, same data but 4.xii.2018, Salles, Chau, Maico and Marulanda leg. ( UFVB 0019 View Materials ) GoogleMaps .

Type repository. Holotype ♂ and allotype ♀ by original designation in Cornell University Insect Collection ( CUIC).Probably lost (pers. comm. Jason Dombroski, collection manager).

Diagnosis. Ulmeritus saopaulensis can be separated from the other species of the genus by the combination of the following characteristics.Male and female imagos (except for character 4):(1)pigmentation of cross-veins on fore wing not forming bands ( Fig.2C View Figure 2 ); (2) hind wing with few cross-veins (around 20); (3) maculae on hind wing restricted to subcostal cross-veins; (4) ventral projection of penis laterally positioned ( Fig.2I View Figure 2 ). Nymph:(5) distal emargination of labrum smooth, lacking denticles ( Fig.3B View Figure 3 ); (6) maxillary palp segment III shorter than segment II( Fig.3D View Figure 3 ); (7) maxillary tusk short.

Redescription

Male imago ( Fig. 1E View Figure 1 ). In alcohol: Body length: 8.0– 8.3 mm; wing length: 7.8–8.3 mm; hind wing length: 1.7–1.8 mm. General coloration: orange brown.

Head ( Figs. 2A, B View Figure 2 ). Orange brown. Upper portion of eyes reddish brown; lower portion dark brown. Ocelli white, surrounded by dark brown ring. Antenna dark brown.

Thorax ( Figs. 2A, B View Figure 2 ). Orange brown. Pronotum with lateral margins dark brown, mesonotum with anterolateral scutal costa dark brown. Pleura white, washed with black. Sterna dark orange brown.

Wings ( Figs.2C–E View Figure 2 ). Membranes of fore wing hyaline ( Fig.2C View Figure 2 ), costal and subcostal areas tinged with brown, paler toward apex.Longitudinal veins yellowish brown, crossvein surrounded with a brown macula. Hind wing ( Figs. 2D, E View Figure 2 ) with membrane hyaline, base tinged with light brown; few cross-veins present (around 20), clouded cross-veins restricted to space between Sc and R.

Legs ( Figs. 2F–H View Figure 2 ). Orange brown. Fore leg ( Fig. 2F View Figure 2 ) with femur stained with black on mid length and on apex; tibia almost completely washed with black, except at the joint with tarsus. Middle ( Fig. 2G View Figure 2 ) and hind legs ( Fig. 2H View Figure 2 ) similar to fore leg except the femur is not stained and tibiae completely orange brown.

Abdomen ( Fig. 1E View Figure 1 ). Terga orange brown, except for a dark brown macula on posterolateral corner of terga I to VII. Sterna orange brown. Caudal filaments orange brown, paler toward apex and region between articulations dark brown.

Genitalia ( Figs. 2I, J View Figure 2 ). Orange brown, styliger plate with area between base of forceps tinged with brown. Forceps orange brown, paler at base. Penis lobe light brown. Ventral projection of penis lobe long and laterally positioned ( Fig. 2J View Figure 2 ), gonopore located at apex of penis lobe.

Male subimago ( Fig.1C View Figure 1 ). Similar to imago, except for the following characteristics: membrane of fore and hind wings gray, longitudinal veins yellowish white; mesoscutum with mediolongitudinal suture, medioparapsidal suture, area between posterior scutal protuberance, and scutellum broadly tinged with yellowish white, outer half of posterior scutal protuberance yellowish brown.

Female imago ( Fig. 1D View Figure 1 ). Body length: 6.7–8.7 mm; fore wing length: 8.7–9.0 mm; hind wing length: 1.8–2.1 mm. Similar to male except for the following characteristics: body coloration lighter. Head dorsally washed with white and with a black stripe close to posterior margin, compound eye black. Pronotum and membranous areas on mesothorax washed with white.

Female subimago. Similar to male subimago.

Nymph ( Figs. 1A, B View Figure 1 ). Body length: 6.8 mm. Tibia I: 1.92 mm. Tibia II: 1.68 mm. Tibia III: 1.72 mm. General coloration: brown.

Head ( Figs. 1A, B View Figure 1 ). Brown, with black marks between compound eyes and ocelli. Ocelli whitish with inner margins black. Eyes of male with upper portions dark orange-brown, lower portion black. Eyes of female black. Antennae yellowish brown.

Mouthparts. Labrum ( Fig. 3A View Figure 3 ), exposed area of mandibles, stipes, paraglossa, and maxillary ( Fig. 3F View Figure 3 ) and labial palp ( Fig. 3I View Figure 3 ) light brown, remaining parts paler. Basal 2/3 of outer margin of mandibles with few scattered setae, apical 1/3 with two groups of setae: a basal one with few long setae and a distal one with denser and smaller setae ( Figs. 4A, E View Figure 4 ). Tusk on inner apical margin of maxilla small ( Fig. 3F View Figure 3 ). Maxillary palp segment I subequal to segment III, segment II 1.2 times longer than segment III.

Thorax ( Fig. 1B View Figure 1 ). Pronotum with lateral black mark and oblique submedian brown band, mesonotum with anterolateral black marks.

Legs ( Figs. 5A–L View Figure 5 ). Yellowish brown. Femur of all legs stained with black at apex. Fore leg with femur with two median maculae, black and smaller on inner margin, dark brown and larger on outer margin; tibia stained with black, darker toward apex; tarsi slightly washed with black, except on base and apex; claw yellowish. Middle and hind leg similar to fore leg, except for smaller size of femoral maculae on middle leg and absence on hind leg, and for tibia completely yellowish brown. Row of pectinate setae on ventral surface of hind tibia mostly single.

Abdomen ( Figs. 1A, B View Figure 1 ). Terga brown, lateral margins, including posterolateral projections, yellowish brown. Sterna yellowish brown. Caudal filaments yellowish brown, darker in the articulations.

Gills ( Figs. 1A, B View Figure 1 ). Gray, tracheae and fimbriae dark gray.

Eggs. Size: 250–260 µm in length, 140–150 µm in width. Oval ( Fig. 5M View Figure 5 ) with polar regions convex, chorionic surface smooth. Knobterminated coiled threads (KCTs) equally distributed, overlapped and completely covering the chorionic surface: when threads are fully coiled, they remain glued to each other. Threads of KCTs long, entirely covering the KCT collar. Slick collar with hexagonal edge; ( Fig. 5M View Figure 5 ). Micropyle present, two, both located close to one of the polar regions (arrows, Fig. 5M View Figure 5 ) and. located among three KCTs.

Distribution ( Fig. 6 View Figure 6 ). Brazil. Bahia State: Maracás municipality (-13.440833, -40.430833, 962 m a.s.l.); Minas Gerais State: Tiradentes (Serra de São José -21.076111, -44.159444, 1224 m a.s.l.) and Paula Cândido (Buieié -20.8738, -42.9800, 739 m a.s.l.) municipalities; São Paulo State: Bauru municipality (-22.3150, -49.0610, 530 m a.s.l.).

Ecological and biological data. In Paula Cândido, nymphs of U. saopaulensis were found in a pond among emergent macrophytes, habitat similar to that described by Da-Silva and Pereira (1992) while originally describing the nymphs. According to these authors, subimagos of the species emerge between 7:00 and 7:30 PM. We have no data on the period of emergence of subimagos, but we observed one subimago emerging at 7:45 PM. Female imagos of U.saopaulensis can carry a mass of eggs ( Fig. 1D View Figure 1 ), similar to females of the closely related Ulmeritoides .