Poecilimon isopterus Kaya & Chobanov, 2018

Kaya, Sarp, Chobanov, Dragan, Heller, Klaus-Gerhard, Yahyaoğlu, Özgül, Uluar, Onur & Çiplak, Battal, 2018, Review of Poecilimon species with inflated pronotum: description of four new taxa within an acoustically diverse group, Zootaxa 4462 (4), pp. 451-482 : 476-477

Poecilimon isopterus Kaya & Chobanov sp.n.

(I in Figures 2–13 , Figures 1D , 14I , 15C,D , 21 , 22 , 23 )

Material examined. Holotype male. 1 M (male No 2 recorded in label), TURKEY: Antalya, S of Ibradı , 36.98060o N, 31.59330o E, 821 m, 30.iv.2015, xerophyte vegetation, collected as nymph 1 st instar on tall herbaceous vegetation, leg. D. Chobanov (CC) (sound record) . Paratypes: 2 MM, 3 FF, TURKEY: Antalya, Ibradı— Derebucak , 1330 m, 37.13384o N, 31.56040o E, 14.vi.2014, leg. S.Kaya & D. Chobanov (in alcohol), mesophyte meadows and oak scrub, collected as nymphs 4–5th instar on the oak leaves (CC); 1 M, 1 F (nymph last instar), same data as holotype ; TURKEY: 2 MM, Antalya, Termessos, Güllük Dağı , 900–1000 m, 27.vi.1997, leg. B. Aslan ( AUZM) ; 2 MM, Antalya, Ibradı , 850 m, 28.vi.1996, leg. B. Çıplak ( AUZM) ; 2 MM, Antalya, Ibradı, around Altınbeşik Cave , 650 m, 05.v.2003, leg. İ. Çinbingel ( AUZM) .

Diagnosis. The new species P. isopterus is aberrant in the group by its short pronotum, the indistinct inflation of metazona and its almost truncate caudal margin (I in Figures 3 , 4 , 7 , 8 ). However, it is clearly a member of the group based on the resemblance with P. inflatus , especially in the structure and coloration (black in apical half) of male cerci ( Figure 9I ) and by its song ( Figure 15C,D ). In addition it is similar to P. bilgeri by the less inflated and caudally truncate metazona of pronotum, but differs by the male cerci regularly incurved as a bow and black in the second half, the longer ovipositor and black abdominal terga in the first 1/2–2/3. It differs from P. inflatus by the metazona indistinctly inflated and caudally not produced, male cerci apically flattened and with 3–5 denticles and female subgenital plate narrowed apically (almost triangular in the new species while roughly quadrangular in P. inflatus ). A striking distinction of the new species is the small male tegmina especially in relation to its body size, and the smaller size of male tegmina in comparison to female tegmina (male left tegmen— 2.1–2.7 mm, in female about 2.8 mm; 3.1–4 mm in other members of the group) ( Figure 23 ). Male stridulatory file is also characteristic being shortest in the group (1–1.4 mm against over 1.4 to 2.5 mm in other members of the group) with finest distal teeth.

Description (holotype, male). Fastigium of vertex <1/3 of scapus ( Figure 3I ). Pronotum short, median sulcus located before to the middle, cylindrical in prozona and weakly inflated in metazona, posterior margin of the disc is truncate or slightly concave, medial carina absent, disk bordered by large light lines; paranotal margin straight along prozona and oblique or indistinctly S-shaped along metazona (I in Figures 3 , 4 ). Tegmina hardly visible beyond the pronotum, stridulatory file with 60–76 small teeth (very fine at both ends of the file). The length of stridulatory file 1.0– 1.4 mm ( Figure 6I ). Cerci cylindrical, straight in proximal half and weakly curved apically, with flattened apex and 3–4 small denticles on external margin ( Figure 9I ); subgenital plate slightly longer than wide and oval in its distal half, distal margin with a small triangular notch ( Figure 11I ). Epiproct roughly 1.5x wider than long, with a convex caudal margin ( Figure 10I ).

Female. Similar to male. Pronotum very similar in shape to that of the male (I in Figures 7 , 8 ). Subgenital plate twice wider than long and with a distinct incision ( Figure 12I ); ovipositor typical for the genus, roughly 5 times as long as its medial width ( Figure 13I ).

Coloration. Occiput with two black spots; disc of pronotum brownish, bordered by light stripes and with blackish pattern along these light stripes; paranota greenish-brown, Abdominal terga black in the first 1/2–2/3 part and brown in remaining part. In female (from İbradı) paranota greenish, disc brown and bordered by light stripes and with irregular dark pattern internal and external to the light bands.

Etymology. The new species characterises by the similar shape of male and female pronotum and especially by the similarity of male and female tegmina, female ones being frequently larger ( Figure 23 ).

Figures

FIGURE 1. Distribution of Poecilimon (P.) inflatus group: A—Total range, B—P. inflatus inflatus, P. inflatus lyciae, P. martinae martinae, P. martinae tlos and P. cretensis, C—P. antalyaensis antalyaensis, P. antalyaensis myrae, P. antalyaensis anemurius, D—P. isopterus and P. bilgeri.

FIGURE 2. Habitus of Poecilimon (P.) inflatus group (left, male; right, female): A—P. inflatus inflatus, C—P. martinae martinae, E—P. cretensis, F—P. antalyaensis antalyaensis, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 3. Male pronotum from above in Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C—P. martinae martinae, D—P. martinae tlos, E—P. cretensis, F—P. antalyaensis antalyaensis, G—P. antalyaensis myrae, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 4. Male pronotum in profile Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C—P. martinae martinae, D—P. martinae tlos, E—P. cretensis, F—P. antalyaensis antalyaensis, G—P. antalyaensis myrae, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 5. Male tegmina in Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C—P. martinae martinae, D—P. martinae tlos, E—P. cretensis, F—P. antalyaensis antalyaensis, G—P. antalyaensis myrae, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 6. Stridulatory file in Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C—P. martinae martinae, E—P. cretensis, F—P. antalyaensis antalyaensis, G—P. antalyaensis myrae, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 7. Female pronotum from above in Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C— P. martinae martinae, E—P. cretensis, F—P. antalyaensis antalyaensis, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri.

FIGURE 8. Female pronotum in profile in Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C—P. martinae martinae, E—P. cretensis, F—P. antalyaensis antalyaensis, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 9. Male cerci in Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C—P. martinae martinae, D—P. martinae tlos, E—P. cretensis, F—P. antalyaensis antalyaensis, G—P. antalyaensis myrae, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 10. Male anal tergum and paraproct in Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C—P. martinae martinae, D—P. martinae tlos, E—P. cretensis, F—P. antalyaensis antalyaensis, G—P. antalyaensis myrae, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 11. Male subgenital plate in Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C—P. martinae martinae, D—P. martinae tlos, E—P. cretensis, F—P. antalyaensis antalyaensis, G—P. antalyaensis myrae, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 12. Female subgenital plate in Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C—P. martinae martinae, E—P. cretensis, F—P. antalyaensis antalyaensis, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 13. Female ovipositor in Poecilimon (P.) inflatus group: A—P. inflatus inflatus, B—P. inflatus lyciae, C—P. martinae martinae, E—P. cretensis, F—P. antalyaensis antalyaensis, H—P. antalyaensis anemurium, I—P. isopterus, J—P. bilgeri

FIGURE 14. Overview of the male calling songs of the species of the Poecilimon (P.) inflatus group. A—P. inflatus inflatus,, B—P. inflatus lyciae, C—P. martinae martinae, D—P. cretensis, E—P. antalyaensis antalyaensis, F—P. antalyaensis anemurium, G—P. antalyaensis myrae, H—P. bilgeri, I—P. isopterus.

FIGURE 15. Oscillograms of male calling song with stridulatory movement [only in A, B; synchronous registration of left tegmen movement and sound (upper line: upward deflection represents opening, downward closing; lower line: sound)] and female acoustical response of P. inflatus and P. isopterus. A—P. inflatus, s-syllable, B—P. inflatus, l-syllables, C—P. isopterus, s-syllable, D—P. isopterus, l-syllables, E—P. inflatus, duet between male and female, upper line female, lower line male and female (see methods).

FIGURE 21. Power spectra of the calling songs of the species and subspecies of the Poecilimon inflatus group.

FIGURE 22. Relationship of body size and middle peak frequency (given as mean of carrier frequencies at -10 dB below and above peak frequency) in the P. inflatus group. A- Peak frequency versus pronotum length, B- Peak frequency versus length of hind femur. Filled symbols mark data from identified individuals, for open symbols means of sizes were used. The black dots indicate the combinations known from other Poecilimon species (from Heller et al. 2006). X marks P. tschorochensis with huge inflated tegmina.

FIGURE 23. Male and female tegmina in P. isopterus.