Toliaridectes antsycurvis,

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

http://treatment.plazi.org/id/03EC87C4-FFF7-5401-FF49-D7EC481DF851

treatment provided by

Plazi

scientific name

Toliaridectes antsycurvis
status

n. gen.

Toliaridectes antsycurvis  n. gen. n. sp.

Fig. 3, 6, 9View FIGURES 1–9, 12, 15, 18, 21, 24View FIGURES 10–24, 31–33View FIGURES 25–33, 48–54View FIGURES 34–54, 57View FIGURES 55–57, 62–67View FIGURES 58–63View FIGURES 64–67, 70–72View FIGURES 68–71View FIGURE 72, Tab. 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 10803View Materials)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. SHGoogleMaps  . 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. SHGoogleMaps  .

Diagnosis. Color: hind femur with weak dark longitudinal pattern on external (outer) field ( Fig. 24View 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. 50View 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. 49View 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. 51View FIGURES 34–54; shorter in T. wendenbaumi  n. gen. n. sp.). Subgenital plate wider than long ( Fig. 48View 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. 57View 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. 62View FIGURES 58–63; longer than wide in T. wendenbaumi  n. gen. n. sp.). Ovipositor short for the genus ( Fig. 63View FIGURES 58–63, Table 3).

Description. Size rather small for the genus ( 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. 24View FIGURES 10–24). Male. Xth abdominal tergite emargination wider than deep ( Fig. 50View FIGURES 34–54); paraprocts with a short narrow projection ( Fig. 49View FIGURES 34–54). Cercus dorsal lobe angulose; median projection long, bilobate ( Fig. 51–54View FIGURES 34–54). Subgenital plate wider than long; with distinct emargination; styli separated by more than styli length ( Fig. 48View FIGURES 34–54). Titillators enlarged distally; internal part shaped as inverted wide T ( Fig. 57View FIGURES 55–57). File with ca. 39 teeth ( Fig. 33View FIGURES 25–33). Female. Subgenital plate with a shallow rounded emargination ( Fig. 62View FIGURES 58–63). Ovipositor short for the genus, straight area of ventral margin short ( Fig. 63View FIGURES 58–63, Table 3).

Acoustic behavior ( Figures 64–67View FIGURES 64–67, 70View 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. 70View 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. 67View 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.

MNHN

Museum National d'Histoire Naturelle

SIF

Senckenbergisches Institut

CAS

California Academy of Sciences