Cloeodes irvingi Waltz & McCafferty 1987
Creators: name: Lima, Lucas R. C.
name: Jacobus, Luke M.
name: Pinheiro, Ulisses
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Baetidae
Cloeodes
Cloeodes irvingi

description: Cloeodes irvingi Waltz & McCafferty, 1987
(Figs. 1–17)
Diagnosis. Nymph: 1) antenna about 1.5 × length of head capsule; 2) labrum with dorsal arc of setae composed of 2 + 0 + 2 long, spine-like setae (Fig. 6); 3) segment III of labial palp subquadrangular (Fig. 11); 4) fore femur with apex not projected, with 2 blunt setae (Fig. 13); 5) tarsal claw 0.4 × length of tarsi; 6) abdominal segments I–II brown with blackish transversal mark on the posterior margin; segments III, V–VII and IX–X brown with whitish marks (Fig. 5); 7) paraproct with 10−13 marginal spines (Fig. 17); 8) caudal filaments with posterior margin of segments with short spines on each segment and long spines on every four segments.
Male imago: 1) turbinate eyes with inner margins parallel (Fig. 1); 2) abdominal terga I–II brown with blackish transversal mark on the posterior margin; segments III, V–VII and IX–X brown with whitish marks; 3) marginal intercalary veins paired, except between veins ICu1–ICu2, ICu2–CuP single, and between Sc–R1 and CuP–A absent (Fig. 2); 4) segment II of forceps with medial constriction (Fig. 4); 5) segment III of forceps elongated; 6) posterior margin of subgenital plate rounded.
Descriptions. Male imago: Length. Body: 3.3–4.2 mm; antenna: 0.7–0.8 mm; fore wing: 3.8 mm; tibia I: 1.6 mm; tibia II: 0.7 mm; tibia III: 0.6 mm; caudal filament: broken off.
Head (Fig. 1). Brownish. Turbinate portion of compound eyes dorsally dark brown, stalk reddish brown. Antennae light brown. Dorsal portion of turbinate eyes oblong; length 1.6 × width; stalk height 0.8 × length of dorsal portion; inner margins parallel (Fig. 1).
Thorax (Fig. 1). General coloration brown. Metanotum with grayish margins. Anteronotal protuberance rounded. Metascutellar protuberance pointed and projected dorsally.
Legs. General coloration translucent brown; all femora with transversal blackish mark. Leg I: tibia 2.7 × length of femur; tarsi 2.5 × length of femur and four segments decreasing on length apically. Leg II: 1.4 × tibia length of femur, tarsi 0.8 × length of femur. Leg III: tibia 1.0 × length of femur, tarsi 0.8 × length of femur.
Fore wing (Fig. 2). Membrane hyaline. Longitudinal and cross-veins pale yellow. Stigmatic area with four cross veins touching subcostal vein. Marginal intercalary veins paired, except between veins ICu1–ICu2 and ICu2–CuPsingle, and between Sc–R1 and CuP–A absent; length of each intercalary vein between IMA and IMA2 0.5 × distance between adjacent longitudinal veins; length of fore wing about 2.3 × width.
Hind wing present (Fig. 3). Membrane hyaline; veins pale yellow; with 2 complete longitudinal veins. Costal process hooked; located on basal third.
Abdomen (Fig. 1). Tergum I brown; terga with segments II −VI whitish translucent and VII −X brown. Tergum I with transversal blackish line on posterior margin; terga II and IV–VII with blackish line interrupted at middle on posterior margin. Tergum IV with medio-postero transversal spots. Tracheation blackish. Sterna with segments II −VI whitish translucent, I and VII −X light brown.
Genitalia (Fig. 4). Light brown. Forceps segment I subrectangular; 0.3 × length of segment II; distance between the base of forceps 0.3 × distance between lateral margins of forceps. Segment II of forceps with medial constriction; inner margin undulated. Forceps segment III 1.7 × longer than wide, 0.1 × length of segment II. Posterior margin of subgenital plate rounded.
Nymph: Length. Body: 4.1−5.5 mm; antenna: 1.3−1.6 mm; cerci: 1.0−1.2; terminal filament: 1.3−1.5.
Head. Light brown with a narrow median longitudinal band brown along the length of vertex; compound eyes and ocellus of male surrounded yellow. Frons with area between antennal bases yellowish. Turbinate portion of compound eyes of male dark brown. Antenna light brown; 1.5 × length of head capsule.
Labrum (Fig. 6). Rectangular, broader than long, length about 0.7 × maximum width; dorsal surface flat; distal margin with medial emargination and small process. Dorsally with many short, fine, simple setae scattered over surface; dorsal arc of setae composed of 2 + 0 + 2 long, spine-like setae. Ventrally with submarginal row of setae decreasing in length toward medial region, composed of lateral and anterolateral bifid and frayed setae, medial setae simple and bifid; ventral surface with 3 short, blunt setae near the anterolateral margins; lateral margin with fine simple setae.
Right mandible (Fig. 7). Inner and outer set of incisors respectively with 3 + 3 denticles. Prostheca slender, bifurcated at middle, inner lobe long, pectinate, outer short and frayed. Margin between prostheca and mola almost straight; tuft of setae between prostheca and mola absent; tuft of spine-like setae at base of mola present; tuft of setae at apex of mola present, reduced to bifid seta. Lateral margins almost straight and bare; basal half bare.
Left mandible (Fig. 8). Inner and outer set of incisors respectively with 3+ 3 denticles. Prostheca robust, apically denticulate and with comb-shape structure at apex. Margin between prostheca and mola almost straight, without crenulations; tuft of setae absent; tuft of spine-like setae at base of mola present; subtriangular process wide, above level of area between prostheca and mola; denticles of mola not constricted; tuft of setae at apex of mola absent. Lateral margins almost straight and bare; basal half bare.
Hypopharynx (Fig. 9). Lingua subequal in length to superlingua; apex with anteromedial lobe rounded, with short, fine, simple setae; medial tuft of short setae present; distal half laterally expanded. Superlingua not expanded; fine, simple setae scattered over lateral and distal margin and basal half of lateral margin with short, spine-like setae.
Maxilla (Fig. 10). Crown of galea-lacinia with 3 denticles and one denti-seta; inner dorsal row of setae with 3 pectinate denti-setae. Medial protuberance of galea with 1 short, spine-like setae + 5 long setae. Maxillary palp reaching apex of galea-lacinia; two-segmented; setae on maxillary palp, short, fine and simple, scattered over surface, a simple setae at apex of segment II; palp segment II 1.3 × length of segment I; apex of last segment not constricted at base.
Labium (Fig. 11). Glossa basally broad, narrowing apically and subequal in length to paraglossa; base of glossa well expanded (reaching more than 2/3 of paraglossa); inner margin with 11−14 spine-like setae increasing in length apically, outer margin with 10−12 long, spine-like setae increasing in length apically; ventral surface with a row of 5−6 spine-like setae near inner.Paraglossa sub-rectangular, curved only at apex; apex with 2 rows of spinelike setae; outer margin with a row of 15−16 long and spine-like setae; ventrally with a row of 5 spine-like setae near to inner margin; dorsal surface bare. Labial palp with segment I 0.9 × length of segments II and III combined; segment I covered with short, simple setae and micropores near to outer margin; inner margin of segment II bare; outer margin with short, fine setae; dorsally with row of 4−5 spine-like, simple setae; ventrally with short, fine, simple setae scattered over surface; segment III subquadrangular length 1.2 × width; covered with spine-like simple setae on ventral surface; dorsally with a row of blunt, spine-like, long setae near to apex and inner margin.
Thorax (Fig. 5). General coloration brown with yellow marks. Fore wing pads light brown.
Hind wing pad. Present; light brown.
Fore leg (Fig. 12). General coloration yellowish; femora with a central light brown spot on anterior surface; tarsal claw yellowish brown. Ratio of fore leg 1.4:1.0 (0.5 mm):1.0:0.2.
Fore femur. Length about 3.9 × maximum width; dorsally with a row of 7 blunt setae (in lateral view they look like spine-like setae); length of setae about 0.1 × maximum width of femur; apex not projected with 2 blunt setae (Fig. 13); ventrally with 5 simple setae; anterior surface with abundant scale-bases and scales near to ventral margin.
Tibia. Dorsally with row of abundant, long, fine, simple setae; ventrally with a row of 6 short, spine-like setae; two lanceolate setae subapically; anterior surface with abundant scale bases and scales near to dorsal margin; tibiopatelar suture present. Subtending bristle present (Fig. 14).
Tarsus. Dorsally with a row of abundant long, fine setae; ventrally with row of 11 spine-like setae and a lanceolate setae near the apex; anterior surface with scale bases and scales scattered over surface; tarsal claw bare, 0.4 × length of tarsi.
Mid and hind leg similar to fore leg.
Abdomen (Fig. 5). General coloration brown. Segments I–II brown with blackish transversal mark on the posterior margin. Segments III, V–VII, and IX–X brown with whitish marks. Segments IV and VIII clearer; male mature nymphs showing two spots in medial area of segment IV. Terga surface with abundant scale bases and micropore; posterior margin of terga with regular spines, 1.7 × as long as wide (Fig. 15). Spines present in posterior margin of segments III −X (in some species present spines on segments II–X, but weakly developed on segment II). Sterna with spines present in posterior margin of segments III −IX.
Gills (Fig. 16). Opaque, trachea dark gray; inner and outer margins light brown. Margin with broad spines and short, fine, simple setae on the apex. Trachea extending from main trunk to inner margin. Gill I about 1.0 × length of segment II; oval. Gill IV about 0.5 × length of the segment V and VI combined; oval. Gill VII about 1.0 × length of segment VIII, oblong.
Paraproct (Fig. 17). With 10−13 marginal spines; surface with abundant scale-bases and micropores; posterolateral extension with blunt marginal spines and scale-bases scattered on surface.
Caudal filaments. Yellowish-brown. Posterior margin of segments with short spines on each segment, and long spines on every four segments.
Life cycle association. Rearing male imagos from nymphs.
Distribution. PARAGUAY. BRAZIL: states of Ceará, Goiás, Minas Gerais, Pernambuco, Rio de Janeiro, and São Paulo (Salles et al. 2003, 2004, 2010; Boldrini et al. 2012; Lima et al. 2012).
Material examined. Holotype, male larva, Paraguay, Paraguari, Parque Nacional Ybicui, Arroyo Mina, edge, 02.x.1984, Bonace RT (PERC). 14 nymphs, Brazil, state of Pernambuco, Amaraji, Rio Amaraji, 20.i.2011, 8°21'48.9"S, 35°28'49.0"W, 320 m, Lima LRC, Nicacio G cols. (PERC); five nymphs, same as preceding except 21.iv.2012, Lima LRC coll. (CZNC); six nymphs and three male imagos (reared), same as preceding except 28.iv.2012 (six nymphs CZNC, two male imagos PERC, and one male imago INPA); three nymphs and one male imago (light trap), Brazil, state of Pernambuco, Amaraji, Rio Amaraji, Poço do Carreiro, 28.iv.2012, 8°22'1.94"S, 35°28'8.73"W, 269 m, Lima LRC coll. (UFPE); one male imago (light trap), Brazil, state of Pernambuco, Correntes, Rio Correntes, Cachoeira Encontro das Águas, 14.ii.2012, 9°11'04.5"S, 36°21'19.7"W, 513 m, Lima LRC, Souza WRM cols. (UFPE); two nymphs, Brazil, state of Pernambuco, Correntes, Rio Correntes, Barragem da Compesa, 15.ii.2012, 9°08'13.0"S, 36°19' 57.5W ", 386 m, Lima LRC, Souza WRM cols. (INPA); one nymph, Brazil, state of Pernambuco, Cortês, Sirinhaém, Banho da Ilha, 05.ii.2011, 8°30’06.5”S, 35°31’28.6”W, 223 m, Lima LRC, Nicacio, G cols. (PERC); same as preceding except 20.iii.2011 (UFPE).
Additional material. Paratype, slide mounted in Euparal (head capsule and fore leg missing), Paraguay, Departamento. Amambay, Parque Nacional, Cerro Cora, Arroyo Panamy, riffle sample, 05.xi.1983, Bonace RT (PERC).
description: Published as part of Lima, Lucas R. C., Jacobus, Luke M. & Pinheiro, Ulisses, 2014, First description of imago and redescription of nymph for Cloeodes irvingi Waltz & McCafferty, 1987 (Ephemeroptera: Baetidae), pp. 575-582 in Zootaxa 3838 (5) on pages 576-580, DOI: 10.11646/zootaxa.3838.5.6, http://zenodo.org/record/228745