Sulawesifulvius thailandicus – a new species of the genus Sulawesifulvius Gorczyca, Chérot & Štys from Thailand (Hemiptera, Heteroptera, Miridae, Cylapinae)

Abstract A new species of the genus Sulawesifulvius, Sulawesifulvius thailandicus Wolski, Yasunaga & Gorczyca, sp. n., is described from Thailand. The present finding also represents the first distribution record in Indochina for the genus. Color adult habitus images for Sulawesifulvius thailandicus and Sulawesifulvius schuhi (type species of the genus), male genital drawings of Sulawesifulvius thailandicus, and scanning electron micrographs of selected structures of Sulawesifulvius schuhi and Sulawesifulvius thailandicus are provided.

In this paper, a new species, S. thailandicus, is diagnosed and described based on material recently collected in central Thailand. Habitus photographic images of Sulawesifulvius schuhi (type species of the genus) and S. thailandicus sp. n., male genitalic drawings of S. thailandicus sp. n., and scanning electron micrographs of the selected structures of S. schuhi and S. thailandicus are provided. The present discovery of a new species in Thailand also represents the first distributional record from Indochina for the genus.

Materials and methods
Observations were made using an Olympus SZX12 stereomicroscope and an Olympus BX50 optical microscope. Digital images of live individuals were taken by TY with Canon EOS Kiss digital camera body + Olympus OM-System. Scanning electron micrographs were taken using Hitachi S-3400N and Phenom XL Scanning Electron Microscopes. Measurements were taken using an eyepiece (ocular) micrometer; all measurements are given in millimeters.
Dissections of male genitalia were performed using the technique mentioned by Kerzhner and Konstantinov (1999). The terminology of the male genitalic structures follows Konstantinov (2003) for the elements of the genital capsule and parameres and Cassis (2008) in using the term "endosoma" for the male intromittent organ. The study was based on the material deposited in the Insect Collection, Entomology & Zoology Group, Plant Protection Research and Development Office, Department of Agriculture, Bangkok (DOA), T. Yasunaga Collection, Nagasaki, Japan (TYCN); and Department of Zoology, University of Silesia, Poland (US). Diagnosis. Recognized by the following set of characters: dorsum yellow with large dark brown and red areas (Figs 2-3); parameres as described below and depicted in Figs 14-17; endosoma with three well-developed sclerites (Fig. 13).

Sulawesifulvius thailandicus
Sulawesifulvius thailandicus is most similar to S. schuhi and S. yinggelingensis in having large red markings on the dorsal surface (Figs 2-3, 20, 23; Mu and Liu 2014) (only slightly tinged with red in S. indicus) (Yeshwanth and Chérot 2015). S. thailandicus can, however, be easily distinguished by the characteristic shape of the parameres (as depicted in Figs 14-17) and the endosoma with three endosomal sclerites (Fig. 13).  (22)(23)(24)(25). Dorsum yellow extensively mottled with dark brown and red. Head. Ground coloration yellow; vertex and frons moderately tinged with brown; vertex with two blackish patch posteriorly, each bordering inner margin of eye; tubercles on vertex and frons each with small dark brown patch; mandibular and maxillary plates and clypeus tinged with red; mandibular plates with two small, dark brown patches basally; antennal segments I and II yellow broadly tinged with red; segment dark brownish; labium dirty yellow tinged with red. Thorax. Pronotum. Yellow broadly tinged with brown and red; calli tinged with black. Mesoscutum and scutellum. Mesoscutum dark brown with small yellow tinges; scutellum mostly yellow, dark brown basally, with brown triangular pattern apically and with small, brown, longitudinal patch at extreme apex. Thoracic pleura. Proepimeron yellowish, weakly tinged with red; mesepimeron and metepisternum dark castaneous; scent gland evaporative area dirty yellow. Hemelytron. Yellow, extensively tinged with dark brown, brown, and red; apical half of exocorium and basal portion of cuneus with marking composed of black, longitudinal, curved patches bordering R+M vein and inner half of basal margin of cuneus (Fig. 2, arrow); membrane fuscous mottled with yellow. Legs. Dirty yellow with dark brown, brown and red tinges. Abdomen. Dark brown. StruCture, texture, and VeStiture (18)(19)(20)(21)(22)(23)(24)(25). Head. Vertex and frons each with pair of relatively large tubercles; labial segments I and II subdivided.

Discussion
The subdivision of the labial segment II in the Fulviini was noted among others by van Doesburg (1985: fig. 5) and Namyatova et al. (2016: fig. 10A). This character was also noted for Psallops Usinger and was not found in the representatives of the remaining cylapine tribes (Namyatova et al. 2016).