Platystigma astictum ( Selys, 1860 )

Machado, Angelo B. M. & Soldati Lacerda, Déborah S., 2017, Revalidation of Platystigma Kennedy, 1920, with a synopsis of the quadratum species group and the description of three new species (Odonata: Pseudostigmatidae), Zootaxa 4242 (3), pp. 493-516: 497

publication ID

https://doi.org/10.11646/zootaxa.4242.3.4

publication LSID

lsid:zoobank.org:pub:4FCEE7BF-C562-4550-9D42-F7B86678DBBB

persistent identifier

http://treatment.plazi.org/id/891587DD-FFC2-9B25-D2A2-FD3FFE2C608F

treatment provided by

Plazi

scientific name

Platystigma astictum ( Selys, 1860 )
status

n. comb.

Platystigma astictum ( Selys, 1860)   n. comb.

Figures 8 View FIGURES 8 – 13 , 14 View FIGURES 14 – 19 , 20 View FIGURES 20 – 24 , 25–28 View FIGURES 25 – 28 , 37 View FIGURES 37 – 41 , 42, 43 View FIGURES 42 – 51 , 52 View FIGURES 52 – 53 , 62, 63 View FIGURES 62 – 65

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).

Material examined. Brazil, Espírito Santo State, Colatina, Córrego   do Gavião , 1♂ 1♀, XI.1930, X.1936, Rosa leg. ( MNRJ)   . Rio de Janeiro, Tinguá , (Res. Florestal), 1♂ 1♀, 9.IV.1971, 20.I.1972, N. Santos leg. ( MNRJ)   . 1♂, Rio de Janeiro, Parque Nacional do Itatiaia , 2.I.1973, O. Mielke leg. ( ABMM)   . 1♀, Nova Friburgo (1.100m), II.2001, E. Grossi leg. ( ABMM)   . 1♀, São Paulo, Jacareí, Fazenda Santana do Rio Abaixo , 12.IV.2003, F.A.A. Lencioni leg. ( FAAL)   . 1♀, Paraná, Ribeirão Vermelho, Campina Grande do Sul , 1.III.2003, Mielke leg. ( ABMM)   .

Diagnosis. Posterior prothoracic lobe of male with median and lateral portions separated by very slight incision, median portion with border straight ( Fig. 8 View FIGURES 8 – 13 ); 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 View FIGURES 14 – 19 ). Venter pale with large black median stripe ( Fig. 20 View FIGURES 20 – 24 ). Male Fw hyaline, without pale apical area, pseudostigma distinct. Hw hyaline, pseudostigma gray with seven cells ( Fig. 25 View FIGURES 25 – 28 ), becoming orange-yellow at high saturation ( Fig. 26 View FIGURES 25 – 28 ). Border of Hw of male with elevation at level of pseudostigma. Female with white apical area reaching level of RP 2 in both wings, with no distinct pseudostigma ( Fig. 27 View FIGURES 25 – 28 ). 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 View FIGURES 25 – 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 View FIGURES 37 – 41 ). Penis segment 3 in ectal view ( Fig. 42 View FIGURES 42 – 51 ) rectangular with no visible spines; in lateral view ( Fig. 43 View FIGURES 42 – 51 ) with small median row of very short spines. Female cercus in dorsal view ( Fig. 52 View FIGURES 52 – 53 ) about as long as S10, parallel, conical, and pilose. Dorsoposterior portion of S10 V-shaped ( Fig. 52 View FIGURES 52 – 53 ). Ovipositor reaching about level of hind border of S10 posteriorly ( Fig. 62 View FIGURES 62 – 65 ). Lateral valve with 9–10 minute, equal-sized teeth, except distal one larger ( Fig. 63 View FIGURES 62 – 65 ). 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. astictum   can be easily identified by the characters given in the keys, the most important being the border of male Hw with subapical elevation. P. astictum   is the species with the largest geographical distribution in the genus, occurring in Southeastern Brazil and extending southward to the state of Paraná ( Fig. 7 View FIGURE 7 ). The biology of adults and larvae of P. astictum   have been studied by Lencioni (2006) with special emphasis on oviposition behavior. A comparison of the oviposition of P. astictum   with that of P. martinezi   is made at the end of this paper.

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro