Callibaetis itannae Cruz & Salles & Hamada 2013, sp. nov.
Creators: name: Cruz, Paulo Vilela
name: Salles, Frederico Falcão
name: Hamada, Neusa
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Baetidae
Callibaetis
Callibaetis itannae

description: Callibaetis itannae sp. nov.   
(Figures 13–16)  
urn:lsid:zoobank.org:act: 65FF651B-BB9B-4A83-8C0B-53960C0D522F  
Known stages: I ♀ ♂, N   Diagnosis   
 Male imago. (1) Dorsal portion of turbinate eyes oval (Figure 13A); (2) forewing hyaline (Figure 13D); (3) marginal intercalary veins paired, except between MP and A veins (Figure 13D); (4) hind wing without cross veins (Figure 13E); (5) costal process of hind wing compound (Figure 13E); (6) abdominal sterna with light brown mark medially on posterior margin of all segments; (7) forceps segment I wide at base (Figure 13C).   
 Female imago. (1) Forewing hyaline (Figure 13G); (2) marginal intercalary veins paired, except between R 3 and A (Figure 13G); (3) hind wing hyaline without cross veins (Figure 13H); (4) costal process of hind wing compound (Figure 13H); (5) abdominal sterna with light brown mark medially on posterior margin of all segments (Figure 13I); (6) abdominal terga light brown with posterior margin of all segments with brown mark submedially (Figure 13F).   
 Mature nymph. (1) Antenna with spines and fine, simple setae on apex of each segment (Figure 14A); (2) distal margin of labrum with deep medial emargination (Figure 14B); (3) margin of labrum with long, fine, simple setae laterally and anterolaterally; medially with short, robust pectinate setae (Figure 14B, C); (4) maxillary palp reaching apex of galea-lacinia (Figure 14G); (5) glossa subequal in length to paraglossa (Figure 14H); (6) labial palp segment I with spine-like setae (Figure 14H); (7) anterior surface of fore femur with robust trifid and bifid spine-like setae near ventral margin (Figure 15B); (8) foretarsus ventrally with one row of spine-like setae and trifid spine-like setae (Figure 15C); (9) hind femur anterior surface with many robust setae near ventral and dorsal margin (Figure 15E); (10) hind claw similar to foreclaw (Figure 15G); (11) gill VII with one fold (Figure 16E); (12) cerci with spines on all segments (Figure 16H); (13) terminal filament with short spines on every one segments (Figure 16I).    Description   
 Male imago. Length: body, 4.8 mm; cercus, 6.24 mm; forewing, 7 mm; hind wing, 0.72 mm; antenna, 0.5 mm; tibia I, 0.9 mm; tibia II, 0.6 mm; tibia III, 0.4 mm. (n = 2) Head (Figure 13A, B). Coloration brown. Turbinate portion of compound eyes dorsally and stalk light brown. Antenna with apex of scape, pedicel and flagellum brownish. Dorsal portion of turbinate eyes oval; length 1.3 × width; stalk height 0.25 × dorsal portion height; inner margins parallel, not reaching each other. Thorax (Figure 13A, B). Anteronotal protuberance and mesoscutum dark brown; submesoscutum and posterior scutal protuberance dark brown; scutellum whitish brown. Anteronotal protuberance rounded. Metascutellar protuberance pointed. Legs: Femur I with trachea black pigmented, tibia I white without brown marks, tarsus I white, claws brown; femora II and III with trachea black pigmented, tibiae II and III white without brown marks, tarsi II and III white, claws brown. Leg I: tibia 1 × length of femur; tarsus 1.3 × length of femur. Leg III: tibia 0.5 × length of femur; tarsus 0.45 × length of femur. Wings. Forewing (Figure 13D) hyaline, apical half of C vein opaque; veins white; stigmatic area with three or four cross veins touching subcostal vein and three or four veins not touching; marginal intercalary veins paired, except between veins MP and A; length of each intercalary vein 0.5–0.8 × distance between adjacent longitudinal veins; length of forewing about 2.7 × width. Hind wing (Figure 13E) hyaline; with one incomplete and two complete longitudinal veins, without cross veins; costal process compound. Abdomen. Terga I to VI white, VII to IX yellowish; tracheation black. Sterna I to VI white, VII to IX yellowish, posterior margin with light brown mark medially. Caudal filaments white. Genitalia (Figure 13C). Forceps white. Forceps segment I wide at base; 0.7 × length of segment II; distance between base of forceps 0.3 × distance between lateral margins of forceps. Forceps segment III oval, 4 × as long as wide; 0.3 × length of segment II. Posterior margin of styliger plate with small medial projection.   
 Female imago. Length: body, 5.7 mm; cercus, 7.5 mm; forewing, 5.2 mm; hind wing, 1.2 mm; antenna, 0.3 mm; tibia I, 0.6 mm; tibia II, 0.9 mm; tibia III, 0.9 mm. (n = 2). Head (Figure 13F). Coloration light brown; compound eyes black. Antenna with scape, pedicel and flagellum brown. Thorax (Figure 13F, I). Anteronotal protuberance, mesoscutum, submesescutum, posterior scutal protuberance and scutellum light brown. Anteronotal protuberance rounded. Metascutellar protuberance pointed. Legs: Femora, tibiae and tarsi light brown, femora with trachea black pigmented; claws brown. Leg I: tibia 0.6 × length of femur; tarsus 0.5 × length of femur. Leg II: tibia 0.8 × length of femur; tarsus 0.3 × length of femur. Leg III: tibia 0.8 × length of femur; tarsus 0.3 × length of femur. Wings. Forewing (Figure 13G) hyaline, apical half opaque; veins white; stigmatic area with minimum of four cross veins not touching Sc vein; marginal intercalary veins paired, except between veins R 3 and A; length of each intercalary vein 0.5 × distance between adjacent longitudinal veins; length of forewing about 2.7 × width. Hind wing (Figure 13H) hyaline, without cross veins; costal process compound. Abdomen (Figure 13F, I). Terga light brown with posterior margin of all segments with brown mark submedially. Tracheation black. Sterna light brown whitish, posterior margin of all segments with brown mark medially. Caudal filaments white.   
 Mature nymph. Length: body, 5.4 mm; cercus, 4.4 mm; terminal filament, 5.5 mm; antenna, 7.2 mm. (n = 2). Head. Coloration: light yellowish brown. Turbinate portion of male compound eyes yellowish brown. Antenna (Figure 14A) yellowish white with spines and fine, simple setae on apex of each segment. Labrum (Figure 14B, C). Excavate medially; length about 0.8 × maximum width; distal margin with deep medial emargination; lateral and anterolateral margin with long, fine, simple setae; distal margin medially with short, robust pectinate setae; long, fine, simple setae scattered over dorsal surface; submarginal row of setae absent; ventrally with short, spine-like setae near lateral margin and many long, simple setae near anterolateral margin. Right mandible (Figure 14D) with 5 + 3 or 4 denticles; prostheca slender, bifurcated subapically, inner lobe short than outer; margin between prostheca and mola slightly convex; tuft of spine-like setae at base of mola present. Denticles of mola not constricted. Tuft of setae at apex of mola present; lateral margins slightly convex; basal half with short, fine, simple setae and pores scattered over dorsal surface. Left mandible (Figure 14E) with 4 + 3 or 4 denticles; prostheca robust and bifid; margin between prostheca and mola straight; tuft of spine-like setae at base of mola present; subtriangular process wide, at the same level as area between prostheca and mola; denticles of mola not constricted; tuft of setae at apex of mola present; lateral margins slightly convex; basal half with short, fine, simple setae and pores scattered over dorsal surface. Hypopharynx (Figure 14F). Lingua with three lobes in distal margin; superlingua not expanded; short, fine, simple setae scattered over distal margin of lingua and superlingua. Maxilla (Figure 14G). Double row of setae with three simple denti-setae. Medial protuberance of galea with 1 + 4 spine-like setae. Maxillary palp reaching apex of galea-lacinia; palp segment II 0.6 × length of segment I; outer margin of segment I scattered with robust, short and pointed setae, apex of inner margin with four or five pointed setae, dorsal and ventral surface with pores; segment II with short pointed setae in inner margin, outer margin with long, fine and simple setae. Labium (Figure 14H). Glossa with regular width along entire length and subequal in length to paraglossa; inner margin with 14 spine-like setae; apex with three to five long spine-like setae; outer margin with many long spine-like setae. Ventral surface scattered with short, fine, simple setae. Paraglossa curved inward; apex with two or three long, robust and simple setae. Ventrally with many long, fine, simple setae. Labial palp with segment I 1 × length of segments II and III combined; segment I covered with robust, simple setae and micropores; segment II without distomedial protuberance; inner and outer margin respectively with four spine-like setae and bare; dorsally with row of seven short spine-like setae; segment III concave; length 1.5 × width; covered with spine-like simple setae along margins and fine, simple setae, scattered over external surface. Thorax. Pronotum with brown spots; mesonotum yellowish with brown and light brown spots; metanotum with yellowish marks; sometimes all thorax light yellowish brown. Foreleg (Figure 15A–D). Femur, tibia and tarsus light yellowish brown; femur with trachea black pigmented. Ratio of foreleg 1.5: (0.58 mm): 0.8: 0.5. Forefemur. Length about 4.5 × maximum width; dorsally with row of short, spine-like setae; apex with two robust spine-like setae; length of setae about 0.1 × maximum width of femur; ventrally with few long, fine and simple setae. Anterior surface with robust spine-like setae near dorsal margin and robust trifid and bifid spine-like setae near ventral margin. Tibia. Dorsally bare; ventrally with one row of short, spine-like setae. Anterior surface with few short, robust spine-like setae. Tarsus. Dorsally bare; ventrally one row of spine-like setae and trifid spine-like setae. Tarsal claw with two rows of denticles increasing in size distally. Hind leg (Figure 15E–G). Femur with one row of short spine-like setae dorsally and ventrally. Anterior surface with many robust setae near ventral and dorsal margin. Tibia ventrally with row of short spine-like setae and one row of robust, pectinate spine-like setae. Abdomen (Figure 16A). Yellowish washed with brown or light brown spots on all segments; terga I, II, IV and VI darker, surface creased. Posterior margin with regular spines, 3 × as long as wide (Figure 16B). Sterna. Surface bare. Gills (Figure 16C–E). Margin smooth; trachea black pigmented, extending from main trunk to outer margin. Gill I about 2 × length of segment II, with two folds; trachea black pigmented. Gill IV as long as length of segments V to VI combined, with two folds. Gill VII about 1.5 × length of segment VIII, with one fold. Paraproct (Figure 16F, G) with 21–25 marginal spines; surface with micropores and short fine, simple setae; posterolateral extension with marginal spines. Terminal filament (Figure 16I) light brown; posterior margin of segments with short spines on every segment. Cerci (Figure 16H) with spines on all segments.    Etymology   
The specific epithet is a tribute by the first author (PVC) to Itanna O. Fernandes: best friend, fantastic wife and the person who found the lake that is the only location at which this new species has been collected.   Comments   
 The nymphs of C. itannae sp. nov. and C. willineri are similar, although those of C. itannae sp. nov. have trifid spine-like setae on tarsi (Figure 15C) and labrum ventrally with many long, simple setae near anterolateral margin (Figure 14B). Nymphs of C. willineri, on the other hand, have pectinate setae on tarsi (fig. 82 in Nieto 2008) and labrum ventrally without many long, simple setae near anterolateral margin (fig. 76a in Nieto 2008).    Material examined   
 Holotype. female imago with corresponding nymphal exuviae, BRAZIL, Rondônia, Porto Velho, Lake for Cond. Águas do Belmont (8 ◦ 40 ′ 41,01 ′′ S, 63 ◦ 53 ′ 21,60 ′′ W), 3 / iii / 2007, P. V. Cruz col. (INPA).   
 Paratypes. Four male imagos, three exuviae, Lake for Cond. Águas do Belmont, 3 / iii / 2007, P. V. Cruz col. (two male imagos and two exuviae in INPA, two male imagos and one exuviae in CZNC). One nymph, four female imagos, two male subimagos, female subimago, five exuviae, Lake for Cond. Águas do Belmont, 23 / iii / 2007, P. V. Cruz col. (two females in INPA, other in CZNC). Four nymphs, Lake for 23 Cond. Águas do Belmont, 30 / ix / 2007, P. V. Cruz col. (two nymphs in INPA, two nymphs in CZNC). Nymph, Lake for Cond. Águas do Belmont, 17 / iii / 2007, P. V. Cruz col. (INPA). One male subimago, Lake for Cond. Águas do Belmont, 14 / iii / 2007, P. V. Cruz col. (INPA). One female imago, Lake for Cond. Águas do Belmont, 21 / iii / 2007, P. V. Cruz col. (CZNC). One male imago, one exuviae, Lake for Cond. Águas do Belmont, 9 / iii / 2007, P. V. Cruz col. (INPA). Nymph, four female imagos, five nymphs, three nymphs, female subimago, five exuviae, Lake for Cond. Águas do Belmont, 7 / iv / 2007, P. V. Cruz col. (INPA). Nymph, Lake for Cond. Águas do Belmont, 5 / iv / 2007, P. V. Cruz col (CZNC).    Distribution   
Brazil: Rondônia state, Porto Velho county.
description: Published as part of Cruz, Paulo Vilela, Salles, Frederico Falcão & Hamada, Neusa, 2013, Callibaetis Eaton (Ephemeroptera: Baetidae) from Brazil, pp. 591-660 in Journal of Natural History (J. Nat. Hist.) (J. Nat. Hist.) 48 (11 - 12) on pages 622-630, DOI: 10.1080/00222933.2013.791883, http://zenodo.org/record/5198763