Callibaetis capixaba, Cruz & Salles & Hamada, 2009

Cruz, P. V., Salles, F. F. & Hamada, N., 2009, Two new species of Callibaetis Eaton (Ephemeroptera: Baetidae) from Southeastern Brazil, Zootaxa 2261 (1), pp. 23-38 : 31-37

publication ID

https://doi.org/ 10.11646/zootaxa.2261.1.2

DOI

https://doi.org/10.5281/zenodo.5314996

persistent identifier

https://treatment.plazi.org/id/03AF8783-FFB2-FFA7-58EE-FEEDFB41F9BF

treatment provided by

Felipe

scientific name

Callibaetis capixaba
status

sp. n.

Callibaetis capixaba sp. n.

( Figs. 27–52 View FIGURES 27–35 View FIGURES 36–42 View FIGURES 43–44 View FIGURES 45–52 )

Male Imago. Maximum length: Body 8.6 mm; cerci 9 mm; forewing 6.9 mm; hind wing 1.2 mm; antenna 0.7 mm; tibia I 2.1 mm; tibia II 0.8 mm.

Head. Coloration brown. Turbinate portion of compound eyes dorsally dark brown, stalk brown ( Figs. 27–28 View FIGURES 27–35 ). Antenna with apex of scape and pedicel dark brown, flagellum brownish.

Dorsal portion of turbinate eyes oval ( Fig. 27 View FIGURES 27–35 ); length 1.8 × width; stalk height 0.9 × width of dorsal portion; inner margins parallel, not touching each other.

Thorax ( Figs. 27–28 View FIGURES 27–35 ). Anteronotal protuberance and medioscutum dark brown; submesoscutum whitish brown; posterior scutal protuberance brown; scutellum brown.

Anteronotal protuberance rounded.

Metascutellar protuberance pointed dorsally.

Legs. Femur I with trachea pigmented in posterior surface and one brown spot subapically, tibia and tarsi I light brown; femur II and III light brown, tibia II and III light brown, tarsi II and III light brown. Leg I: tibia 1.3x length of femur; tarsi 1.1 × length of femur; and with 4 segments decreasing in length apically. Leg II and III: tibia 1.1 × length of femur; tarsi 0.6 × length of femur.

Wings. Forewing hyaline; veins light brown; stigmatic area with three cross veins touching subcostal vein and six or seven veins not touching subcostal vein ( Fig. 29 View FIGURES 27–35 ); marginal intercalaries paired, except between veins ICu1 and A; length of each intercalary vein 0.5 × distance between adjacent longitudinal veins; length of forewing about 2.5 × width.

Hind wing hyaline with three complete longitudinal veins ( Fig. 30 View FIGURES 27–35 ); costal process rounded located on basal third.

Abdome. Terga brown, anterolaterally light brown; tracheation black. Sterna light brown with many red spots, one red mark laterally and other sublaterally, medially with brown mark. Caudal filaments white, base and apex of every segment dark brown.

Genitalia. Forceps segment I light yellowish brown, segment II light yellowish brown, segment III light yellowish ( Fig. 31 View FIGURES 27–35 ). Forceps segment I wide at base and with small distomedial projection 0.4 × length of segment II; distance between base of forceps 0.2 × distance between lateral margins of forceps. Forceps segment II narrow medially. Forceps segment III oval, 0.5 × as long as wide; 0.1 × length of segment II. Posterior margin of styliger plate straight, with wide and small dorsal projection.

Female Imago. Maximal length: body 7.8 mm; cerci 12 mm; forewing 7.3 mm; hind wing 1 mm; antenna 0.9 mm; tibia II 1 mm; tibia III 1 mm.

Head. Coloration brown with whitish medial marks ( Fig. 32 View FIGURES 27–35 ); compound eyes greenish black with longitudinal brown line. Antenna with apex of scape and pedicel dark brown, flagellum brownish.

Thorax ( Fig. 32 View FIGURES 27–35 ). Anteronotal protuberance brown; medioscutum brown; submesoescutum white; posterior scutal protuberance brown; scutellum whitish brown.

Anteronotal protuberance rounded.

Metascutellar protuberance pointed.

Legs. Femur II and III with trachea pigmented in posterior surface, one brown spot subapically; tibia II and III light brown; tarsi II and II light brown. Leg II tibia 0.6 × length of femur; tarsi 0.5 × length of femur. Leg III tibia 0.6 × length of femur; tarsi 0.5 × length of femur.

Wings. Forewing hyaline; veins brown; stigmatic area with six cross veins touching subcostal vein and with minimum of one vein not touching subcostal vein ( Fig. 33 View FIGURES 27–35 ); marginal intercalaries paired, except between veins CuA and A; length of each intercalary vein 0.4 × distance between adjacent longitudinal veins; length of forewing about 2.6 × width.

Hind wing hyaline; two complete longitudinal veins and one incomplete, not reaching apex of hind wing ( Fig. 34 View FIGURES 27–35 ); costal process rounded, located on basal third.

Abdomen. Terga dark brown with red spots medially ( Fig. 32 View FIGURES 27–35 ). Tracheation black. Sterna reddish brown with many red spots, one red mark laterally and sublaterally ( Fig. 35 View FIGURES 27–35 ). Caudal filaments white, base and apex of every segment dark brown.

Mature nymph. Length of body: 7.5 mm; cerci: 3.2 mm; terminal filament: 2.6 mm.

Head. Turbinate portion of male compound eyes yellowish brown.

Antenna ( Fig. 36 View FIGURES 36–42 ) with spines and fine, simple setae on apex of each segment. Lateral branch of epicranial suture curved. Frontal keel absent.

Labrum. Excavate medially; length about 0.9 × maximum width; distal margin with deep V shaped medial emargination ( Fig. 37a View FIGURES 36–42 ); with lateral setae long, fine and simple; anterolateral setae long, fine and apically bifid; medial setae, short, robust and apically bifid ( Fig. 37b View FIGURES 36–42 ); dorsally with long, fine, simple setae scattered over surface; submarginal row of setae absent; ventrally with short, spine-like setae near lateral and anterolateral margin.

Right mandible ( Fig. 38 View FIGURES 36–42 ). Incisors cleft in two sets, inner and outer set of incisors respectively with 4 + 4 denticles; prostheca slender, bifurcated at middle, inner lobe long, outer short; margin between prostheca and mola straight with tuft of setae; tuft of spine-like setae at base of mola present; tuft of setae at apex of mola present; lateral margins slightly convex; basal half with short, fine, simple setae scattered over dorsal surface.

Left mandible ( Fig. 39 View FIGURES 36–42 ). Incisors cleft in two sets; inner and outer set of incisors respectively with 4 + 4 denticles; prostheca robust and bifid; margin between prostheca and mola straight with tuft of setae; 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 absent; lateral margins slightly convex; basal half with short, fine, simple setae scattered over dorsal surface.

Hypopharynx ( Fig. 40 View FIGURES 36–42 ). Lingua with three lobes on distal margin; superlingua not expanded; short, fine, simple setae scattered over distal margin of lingua and superlingua.

Maxilla. Crown of galea-lacinia with three denticles; double row of setae with two pectinate denti-setae ( Fig. 41a View FIGURES 36–42 ). Medial protuberance of galea with 1 + 7 spine-like setae. Maxillary palp reaching apex of galealacinia; palp segment II 0.7 × length of segment I; segment I of maxillary palp with long, fine and simple setae on over surface ( Fig. 41b View FIGURES 36–42 ).

Labium. Glossa broad and shorter than paraglossa ( Fig. 42a View FIGURES 36–42 ); inner margin with 14 spine-like setae increasing in length apically; apex with 3–5 long spine-like setae; outer margin with many long spine-like setae. Ventral surface scattered with long, fine, simple setae and one robust, short pectinated spine-like setae near apical margin ( Fig. 42b View FIGURES 36–42 ). Paraglossa sub-retangular, curved truncated at apex ( Fig. 42a View FIGURES 36–42 ); apex with many short, fine and simple setae. Ventrally with many long, fine and simple setae. Labial palp with segment I 0.9 × length of segments II and III combined; segment I bare, covered with micropores as in Fig. 42a View FIGURES 36–42 ; inner and outer margin with seven spine-like setae and few short, fine, simple setae; dorsally with row of three fine and simple setae; segment III concave length 1.4 × width covered with spine-like simple setae along margins and fine, simple setae, scattered over outer surface.

Thorax. Pronotum with yellowish three blackish spots, one near midline, one near lateral margin, and one between them; mesonotum yellowish with brown and light brown marks; metanotum yellowish with brown and dark brown marks.

Foreleg. Basal half with brown mark. Ratio of foreleg 1.5: 1 (0.8mm): 0.8: 0.5. Femur ( Figs. 43a View FIGURES 43–44 ). Length about 0.2 × maximum width; dorsally with row of short, spine-like setae; length of setae about 0.1x maximum width of femur; apex with two robust spine-like setae; ventrally with few long, fine and simple setae. Anterior surface with robust spine-like setae near dorsal margin and robust three and two-pointed spine-like setae near ventral margin ( Fig. 43b View FIGURES 43–44 ). Tibia. Dorsally bare; ventrally with one row of short, spine-like setae. Anterior surface with few short, robust spine-like setae. Tibio-patelar suture present. Tarsus. dorsally bare; ventrally one row of spine-like setae and one row of three–pointed spine-like setae ( Fig. 43c View FIGURES 43–44 ). Tarsal claw with two rows of denticles increasing in size distally ( Fig. 43d View FIGURES 43–44 ).

Middle and hind leg. Femora without robust three-pointed spine-like setae near ventral margin ( Fig. 44a View FIGURES 43–44 ). Claw with two rows of minute denticles ( Fig. 44b View FIGURES 43–44 ).

Abdomen. Yellowish washed with brown or light brown with brown and/or dark brown spots on all segments; lateral transversal brown mark on segments II to VII; segments III, V, VII and IX darker ( Fig. 45 View FIGURES 45–52 ). Abdominal tubercles absent. Terga surface without scales or scale-bases. Posterior margin with regular spines, 3 × as long as wide. Sterna. Surface with scattered fine, simple setae. Segments with posterior margin with spines: I–IX ( Fig. 46 View FIGURES 45–52 ).

Gills. On segments I–VII. Margin with short, fine and simple setae; tracheae pigmented, extending from main trunk to outer margin. Gill I subequal in length to segment II ( Fig. 47 View FIGURES 45–52 ); with one fold; trachea pigmented. Gill IV as long as length of segments V to half VI combined ( Fig. 48 View FIGURES 45–52 ); with one fold. Gill VII subequal in length to segment VIII ( Fig. 49 View FIGURES 45–52 ); with one fold.

Paraproct with 25–30 marginal spines; surface with micropores and short fine, simple setae ( Fig. 50 View FIGURES 45–52 ); postero-lateral extension with minute marginal spines.

Inner margin of cercus and inner and outer margins of terminal filament with tufts of long setae ( Fig. 51– 52 View FIGURES 45–52 ). Caudal filaments ( Fig. 52 View FIGURES 45–52 ) white with brown mark on each three segments; posterior margin of segments with spines on each segment.

Diagnosis: C. capixaba sp. n. can be distinguished from other species in the genus by the following combination of characters:

In the male imagines: 1) dorsal portion of turbinate eyes ( Fig. 27 View FIGURES 27–35 ) oval, inner margins parallel, not touching each other; 2) forewing hyaline ( Fig. 29 View FIGURES 27–35 ); 3) marginal intercalaries paired, except between veins ICu1 and A; 4) length of each intercalary vein 0.5 × distance between adjacent longitudinal veins; 5) hind wing hyaline with three complete longitudinal veins ( Fig. 30 View FIGURES 27–35 ); 6) costal process rounded; 7) sterna light brown with many red spots, one red mark laterally and other sublaterally, medially with brown mark; 8) forceps segment I wide at base and with small distomedial projection ( Fig. 31 View FIGURES 27–35 ); 9) forceps segment III oval, 0,5x as long as wide ( Fig. 31 View FIGURES 27–35 ).

In female imagines: 1) forewing hyaline ( Fig. 33 View FIGURES 27–35 ); 2) marginal intercalaries paired, except between veins CuA and A; 3) hind wing hyaline, two complete longitudinal veins and one incomplete, not reaching apex of hind wing ( Fig. 34 View FIGURES 27–35 ); 4) costal process rounded; 5) sterna reddish brown with many red spots, one red mark laterally and sublaterally ( Fig. 35 View FIGURES 27–35 ).

In the nymph: 1) antenna with spines and fine simple setae on apex of each segment ( Fig. 36 View FIGURES 36–42 ); 2) labrum excavate medially ( Fig. 37a View FIGURES 36–42 ), distal margin with deep “V” shaped medial emargination; with lateral setae long, fine and simple; 3) anterolateral setae long, fine and apically bifid; medial setae short, robust and apically bifid ( Fig. 37b View FIGURES 36–42 ); 4) glossa broad and shorter than paraglossa ( Fig. 42a View FIGURES 36–42 ); 5) labial palp with outer margin with few short, fine, simple setae ( Fig. 42a View FIGURES 36–42 ); 6) anterior surface of fore femur with robust spine-like setae near dorsal margin and robust three and two-pointed spine-like setae near ventral margin ( Fig. 43b View FIGURES 43–44 ); 7) fore tarsus dorsally bare; ventrally one row of spine-like setae and one row of three-pointed spine-like setae ( Fig. 43c View FIGURES 43–44 ); 8) mid and hind leg with femur without robust three-pointed spine-like setae near ventral margin; 9) mid and hind claws with two rows of minute denticles ( Fig. 44b View FIGURES 43–44 ); 10) gill VII subequal in length to segment VIII ( Fig. 48 View FIGURES 45–52 ); with one fold; 11) caudal filaments with posterior margin of segments with spines on each segment ( Fig. 50 View FIGURES 45–52 ).

Etymology. After “ Capixaba,” the name by which people born in the state of Espírito Santo are known.

Material examined. Holotype, female imago with corresponding nymphal exuviae, BRAZIL, Espírito Santo State, Santa Teresa County, (19º 52' 30,9''S; 40º 32' 07,4''W), pool, sand, 26/x/ 2008, Salles, F.F. col. GoogleMaps Paratypes: one male (reared), 20 nymphs, same data as holotype. One male and GoogleMaps one female (both reared), Espírito Santo State, Santa Teresa County, Reserva Biológica Augusto Ruschi (19º 55' 30,1''S; 40º 33' 21,9''W), pool, sand, 26/ii/ 2009, Salles, F.F. col. GoogleMaps Holotype and 2 paratypes housed at UFES .

UFES

Universidade Federal do Espirito Santo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Ephemeroptera

Family

Baetidae

Genus

Callibaetis