Toliaridectes antsycurvis, Hugel, 2019

Hugel, Sylvain, 2019, First record of shield-backed katydids in Madagascar with the description of a new genus and three new species (Orthoptera: Ensifera: Tettigoniidae: Tettigoniinae Arytropteridini), Zootaxa 4706 (4), pp. 546-560 : 555

publication ID	https://doi.org/ 10.11646/zootaxa.4706.4.4
publication LSID	lsid:zoobank.org:pub:D5917547-D026-42E4-AE59-A891C30E756C
persistent identifier	https://treatment.plazi.org/id/03EC87C4-FFF7-5401-FF49-D7EC481DF851
treatment provided by	Plazi
scientific name	Toliaridectes antsycurvis
status	gen. nov.

Treatment

Toliaridectes antsycurvis View in CoL n. gen. n. sp.

Fig. 3, 6, 9 View FIGURES 1–9 , 12, 15, 18, 21, 24 View FIGURES 10–24 , 31–33 View FIGURES 25–33 , 48–54 View FIGURES 34–54 , 57 View FIGURES 55–57 , 62–67 View FIGURES 58–63 View FIGURES 64–67 , 70–72 View FIGURES 68–71 View FIGURE 72 , Tab. 3 View TABLE 3 .

Toliaridectes antsycurvis n. gen. n. sp., here described.

Holotype male. Madagascar, province Toliara, région Atsimo-Andrefana, Tulear II, Manombo-Sud, Andrevo-Bas , 23.1524°S, 43.6270°E, 15-16.ii.2019, S. Hugel leg. (2019 MADASH 043 ), MNHN (MNHN-EO-ENSIF10802). GoogleMaps

Paratypes. Madagascar, province Toliara, région Atsimo-Andrefana, Tulear II, Manombo-Sud, Ranobe, 23.0033°S, 43.6233°E, 21.ii.2019, S. Hugel leg. (2019 MADASH 186 , ♀ Allotype), MNHN ( MNHN-EO-EN- SIF 10803) GoogleMaps . same as holotype, (2019 MADASH 011 ♀, 042 ♂), coll. SH. same as allotype, (2019 MADASH 187 ♀), CAS ( CASENT0872623 ) . Madagascar, province Toliara, région Atsimo-Andrefana, Tulear II, Belalanda, Ifaty, 23.1413°S, 43.6152°E, 18.ii.2019, S. Hugel leg. (2019 MADASH 068 ♂, 069 ♀), coll. SH GoogleMaps . Madagascar, province Toliara, région Atsimo-Andrefana, Tulear II, Belalanda, Tsivonoe, 23.1502°S, 43.6268°E, 18.ii.2019, S. Hugel leg. (2019 MADASH 145 ♀), coll. SH GoogleMaps .

Diagnosis. Color: hind femur with weak dark longitudinal pattern on external (outer) field ( Fig. 24 View FIGURES 10–24 , shiny black pattern in T. meridionalis n. gen. n. sp. and T. wendenbaumi n. gen. n. sp.). Male. Xth abdominal tergite emargination wider than deep ( Fig. 50 View FIGURES 34–54 ; narrower in T. wendenbaumi n. gen. n. sp. and T. meridionalis n. gen. n. sp.); paraprocts with a short narrow projection ( Fig. 49 View FIGURES 34–54 ; long digitiform projection in T. meridionalis n. gen. n. sp., short and wide in T. wendenbaumi n. gen. n. sp.). Cercus median projection long ( Fig. 51 View FIGURES 34–54 ; shorter in T. wendenbaumi n. gen. n. sp.). Subgenital plate wider than long ( Fig. 48 View FIGURES 34–54 ; wider than long in T. meridionalis n. gen. n. sp., longer than wide in T. wendenbaumi n. gen. n. sp.). Titillators enlarged distally ( Fig. 57 View FIGURES 55–57 ; pointing in T. meridionalis n. gen. n. sp. and T. wendenbaumi n. gen. n. sp.). Female. Subgenital plate wider than long, with shallow rounded emargination ( Fig. 62 View FIGURES 58–63 ; longer than wide in T. wendenbaumi n. gen. n. sp.). Ovipositor short for the genus ( Fig. 63 View FIGURES 58–63 , Table 3 View TABLE 3 ).

Description. Size rather small for the genus ( Table 3 View TABLE 3 ). Color: head genae with distinct black pattern and dots; pronotum folds with usually without a light band edging the black band; hind femur with weak dark longitudinal pattern on external (outer) field ( Fig. 24 View FIGURES 10–24 ). Male. Xth abdominal tergite emargination wider than deep ( Fig. 50 View FIGURES 34–54 ); paraprocts with a short narrow projection ( Fig. 49 View FIGURES 34–54 ). Cercus dorsal lobe angulose; median projection long, bilobate ( Fig. 51–54 View FIGURES 34–54 ). Subgenital plate wider than long; with distinct emargination; styli separated by more than styli length ( Fig. 48 View FIGURES 34–54 ). Titillators enlarged distally; internal part shaped as inverted wide T ( Fig. 57 View FIGURES 55–57 ). File with ca. 39 teeth ( Fig. 33 View FIGURES 25–33 ). Female. Subgenital plate with a shallow rounded emargination ( Fig. 62 View FIGURES 58–63 ). Ovipositor short for the genus, straight area of ventral margin short ( Fig. 63 View FIGURES 58–63 , Table 3 View TABLE 3 ).

Acoustic behavior ( Figures 64–67 View FIGURES 64–67 , 70 View FIGURES 68–71 ). Males of Toliaridectes antsycurvis n. gen. n. sp. sing at least at night; we have not recorded calls by day hours. Males adopt a peculiar position while singing, the abdomen bent downwards allowing to release the forewings from the pronotum ( Fig. 70 View FIGURES 68–71 ). I recorded one male by night at 0h30 a.m. and 30°C. This call was mostly in the ultrasound range (peaking above 20 kHz). It was made of very long repetitions (minutes) of short phonatomes repeated every 46.5 ± 0.3 ms (corresponding to 21.7 Hz). Phonatomes were made of 5–7 pulses of increasing amplitude ( Fig. 67 View FIGURES 64–67 ; small pulses may have been missed in the noise). Phonatome duration is 29.0 ± 0.4 ms.

Derivation of name. Antsy (Malagasy): knife; curvis (latin): curved. After the shape of ovipositor.