Revalidation of Platystigma Kennedy, 1920, with a synopsis of the quadratum species group and the description of three new species (Odonata: Pseudostigmatidae)
Machado, Angelo B. M.
Soldati Lacerda, Déborah S.
Zootaxa
2017
4242
3
493
516
Selys, 1860
Selys
1860
[151,566,754,780]
Magnoliopsida
Papaveraceae
Platystigma
Animalia
Ranunculales
4
497
Tracheophyta
species
astictum
comb. nov.
Selys (1860: 15); McLachlan (1877: 88); Davies & Tobin (1984: 58); Machado (1985: 35); Selys (1886: 21); Garrison & Ellenrieder (2016: 20); Bridges (1994: VII–21); Machado (1998: 507); Tsuda (2000: 57); Lencioni (2005: 152, 2006: 295); Heckman (2008: 206); Garrison, Ellenrieder & Louton (2010: 391); Schorr & Paulson (2016).
Materialexamined. Brazil, Espírito SantoState, Colatina, Córregodo Gavião, 1♂ 1♀, XI.1930, X.1936, Rosaleg. ( MNRJ). Rio de Janeiro, Tinguá, (Res. Florestal), 1♂ 1♀, 9.IV.1971, 20.I.1972, N. Santosleg. ( MNRJ). 1♂, Rio de Janeiro, Parque Nacional do Itatiaia, 2.I.1973, O. Mielkeleg. ( ABMM). 1♀, Nova Friburgo( 1.100m), II.2001, E. Grossileg. ( ABMM). 1♀, São Paulo, Jacareí, Fazenda Santana do Rio Abaixo, 12.IV.2003, F.A.A. Lencionileg. ( FAAL). 1♀, Paraná, Ribeirão Vermelho, Campina Grande do Sul, 1.III.2003, Mielkeleg. ( ABMM).
Diagnosis.Posterior prothoracic lobe of male with median and lateral portions separated by very slight incision, median portion with border straight ( Fig. 8); in female median and lateral portions not distinguishable and border of median portion slightly convex. Pterothorax with antehumeral pale stripe reaching about ¾ length of pterothorax ( Fig. 14). Venter pale with large black median stripe ( Fig. 20). Male Fw hyaline, without pale apical area, pseudostigma distinct. Hw hyaline, pseudostigma gray with seven cells ( Fig. 25), becoming orange-yellow at high saturation ( Fig. 26). Border of Hw of male with elevation at level of pseudostigma. Female with white apical area reaching level of RP 2 inboth wings, with no distinct pseudostigma ( Fig. 27). At high saturation white area of Hw becomes light-blue with yellow venation, costal vein orange, and the pseudostigma becomes distinct with 11 cells ( Fig. 28). Anterior hamuli with ear-like basal plate, with posteromedial angle sclerotized. Distal portion of batilliform lamina curved ventrally with sclerotized apex. Posterior hamuli curved anteriorly ( Fig. 37). Penis segment 3 inectal view ( Fig. 42) rectangular with no visible spines; in lateral view ( Fig. 43) with small median row of very short spines. Female cercus in dorsal view ( Fig. 52) about as long as S10, parallel, conical, and pilose. Dorsoposterior portion of S10 V-shaped ( Fig. 52). Ovipositor reaching about level of hind border of S10 posteriorly ( Fig. 62). Lateral valve with 9–10 minute, equal-sized teeth, except distal one larger ( Fig. 63). Female similar to male, except for presence of pale apical area in Hw and for border with no elevation.
Measurements (mm): ♂Hw 41–42, abdomen 59–61; ♀Hw 42–51, abdomen 57–61.
Remarks. Male and female of P. astictumcan be easily identified by the characters given in the keys, the most important being the border of male Hw with subapical elevation. P. astictumis the species with the largest geographical distribution in the genus, occurring in Southeastern Braziland extending southward to the state of Paraná( Fig. 7). The biology of adults and larvae of P. astictumhave been studied by Lencioni (2006)with special emphasis on oviposition behavior. A comparison of the oviposition of P. astictumwith that of P. martineziis made at the end of this paper.
1439511245
XI. 1930, X. 1936
MNRJ
Rosa
Brazil
Gaviao
Material
4
497
2
1
1
Espirito Santo
1439511243
[258,1304,1025,1050]
9. IV. 1971, 20. I. 1972
MNRJ
N. Santos
Brazil
Tingua
4
497
2
1
1
Rio de Janeiro
1439511242
1973-01-02
ABMM
O. Mielke
Brazil
Parque Nacional do Itatiaia
4
497
1
1
Rio de Janeiro
1439511244
2001-02
ABMM
E. Grossi
Brazil
1100
Nova Friburgo
4
497
1
1
Rio de Janeiro
1439511247
2003-04-12
FAAL
F. A. A. Lencioni
Brazil
Jacarei
Rio Abaixo
Fazenda Santana do Rio Abaixo
4
497
1
1
Sao Paulo
1439511251
[254,1276,1133,1158]
2003-03-01
ABMM
Mielke
Brazil
Campina Grande do Sul
Ribeirao Vermelho
4
497
1
1
Parana