The genus Bittacus Latreille (Insecta: Mecoptera) in Brazil: key to species, distribution maps, new synonym, and three new species
Machado, Renato Jose Pires
Mendes, Diego Matheus De Mello
Rafael, José Albertino
Zootaxa
2018
2018-11-30
4526
3
303
330
Machado
Machado & Mendes & Rafael
2018
[151,441,354,380]
Insecta
Bittacidae
Bittacus
GBIF
Animalia
Mecoptera
4
307
Arthropoda
species
cruzi
sp. nov.
( Figs. 8f, 9a–f, 12b)
Diagnosis.Wing membrane maculated. One costal crossvein. Hind wing Rs 1+2not forked. Male epandrium with one medial actiniform process.
Description.Forewing length 16.7–17.1 mm, hind wing length 13.8–14.2 mm. Head ( Figs. 9c, d) uniformly dark brown, except area behind ocellar triangle and distal palpomeres slightly paler; covered with yellowish pubescence. Three ocelli, lateral ocelli slightly larger. Antennae long, filiform, with yellowish pubescence; dark brown but lighter towards the apex. Number of flagellomeres undetermined but more than 15. Female frons and antennae pale brown. Thorax ( Fig. 9d) covered with yellowish pubescence. Pronotum brown with sparse dark spots. Antepronotum and postpronotum with one and two black setae on lateral margins respectively. Mesonotum and metanotum brown but darker laterally. Pleural region dark brown with scattered paler areas ( Fig. 9a). Legs ( Fig. 9a) with coxa and trochanter dark brown, yellowish pubescence (slightly longer than on other segments). Femur and tibia with sparse short black setae. Fore and middle femur long and thin, mostly pale, but base laterally brown and apex dark brown. Hind femur broader and slightly darker than on other legs. Tibia pale with apex dark brown; longer than femur; with two long apical spurs; spurs on fore and middle legs about as long as half-length of basitarsus, but slightly shorter than basitarsus in hind leg. Fore and mid tarsi pale; basitarsi slightly shorter than tibial half-length, and longer than the remaining four tarsomeres combined; tarsomere III about as long as half-length of tarsomere II and slightly longer than tarsomere IV; tarsomere V about as long as tarsomere IV and prehensile. Hind tarsus shorter than half-length of hind tibia; tarsomeres IĪIV about the same length, basitarsus about twice longer than tarsomere II. Wings ( Figs. 9a, b) narrow with apices rounded. Membrane mostly light brown, but with dark marks around the main forks, apical crossveins, pterostigma, and areas between R and C and R and Rs 1+2; with large hyaline area before the beginning of the pterostigma, thyridium present; longitudinal veins pale and covered by short black setae. Forewing: one subapical costal crossvein; humeral crossvein present; Sc ending beyond first fork of Rs; Rs fork nearly forming a right angle; Rs 1+2forking after the end of pterostigma; Rs 3+4forking at the level of mid distance between Sc end and pterostigma; one pterostigmal crossvein; M origin basal to Rs origin; M and Rs first forks at the same level; Cu 1ending at the level of Rs 3+4fork; A 1ending slightly basal to Rs first fork. Hind wing similar to forewing except by Rs 1+2not forked. Abdomen ( Fig. 9a) mostly brown with dark spots, mainly in the posterior border of tergites. Male terminalia ( Figs. 8f, 9e, f) with epandrium pale brown, set with long yellowish setae; in dorsal view, both sides diverging posteriorly; apex slightly thinner than medial area; posterior margin rounded; internal margin set with short black setae (setae getting longer towards the apex); with a medial rectangular lobe at the base (lobe covered by short black spines); in lateral view, ending slightly after the end of basystilus; convex dorsally; posterior margin rounded. Cercus about as long as sternite IX, dark brown with yellowish setae. Basistylus set with long yellowish setae, particularly at the posterior margin; dark brown; ventrally convex in lateral view. Gonostylus short, dark brown, with apex rounded, set with yellowish setae. Penisfilum broad at base, abruptly narrowed medially, tapering towards the apex, curving backwards at the medial region. Paratypefemale terminalia with cercus short, brown, set with yellowish setae. Subanal plate and tergite XI dark brown and set with short yellowish setae. Cercus, subanal plate, and tergite XI ending about at the same level. Gonocoxosternite dark brown, set with yellowish setae and longer black ones at the posterior margin; not fused ventrally.
Etymology.Named after Mr. Valdir Bernardo Cruz, who owns the property where the holotypewas collected and has allowed our collection trips many times over the years. Holotypemale (present designation): INPA: BRASIL, Amazonas, Presidente Figueiredo, AM240, Km24, 2°00’55’’S– 59°49’40’’W, viii/2005, luz mista/mercurio, Xavier-Filholeg.
Holotypecondition.Pinned; in relative good condition, but with some parts missing: left foretarsus, mid legs beyond femur base, left hind leg beyond apex of femur; terminalia in microvial. Paratypes. Brazil, Amazonas: Presidente Figueiredo, AM240, Km24, 2°00’55’’S– 59°49’40’’W, 6–7.ix.2008, Malaise trap, F.F. XavierF°, T.K. Krolow, G. Lourido( 1♀ INPA); Manaus, AM0 10, km 26, Reserva Ducke, 14.iii.1978, Malaise trap, Jorge Ariascoll. ( 1♀ INPA).
Comments.Based on its maculated wings, Bittacus cruzi sp. n.fits in the “group chilensis” as proposed by Collucci & Amorim (2000). Within the group, it shares with B. ferreiraiand B. maculosusthe number of costal crossveins in the wings (one). However, the shape of the male epandrium suggests a closer relationship between Bittacus cruziand B. boraceiensis; both species present a medial actiniform process, but the subapical processes of B. boraceiensisare absent in the new species, easily separating them.
2029164243
2005-08
Presidente Figueiredo, AM & Xavier-Filho
Brazil
-2.0152779
Amazonas
21
-59.827778
Km
4
307
1
holotype
2029163765
2008-09-06
2008-09-07
2008-09-06
INPA
Presidente Figueiredo, AM & F. F. Xavier & T. K. Krolow & G. Lourido
Brazil
-2.0152779
Amazonas
21
-59.827778
Km
5
308
1
1
paratype
2029164924
1978-03-14
INPA
Manaus, AM & Jorge Arias
Brazil
Reserva Ducke
5
308
1
1
paratype