Teleogryllus mitratus ( Burmeister, 1838 )

Jaiswara, Ranjana, Desutter-Grandcolas, Laure & Jain, Manjari, 2021, Taxonomic revision of Teleogryllus mitratus (Burmeister, 1838) and T. occipitalis (Serville, 1838) in India, withthe description of Teleogryllus rohinae Jaiswara & Jain sp. nov. and a key for Teleogryllus species from India (Orthoptera: Gryllidae), Zootaxa 5016 (1), pp. 81-106 : 85-88

publication ID	https://doi.org/ 10.11646/zootaxa.5016.1.3
publication LSID	lsid:zoobank.org:pub:F0DA73A8-E6EE-4A64-873C-964D8F25670B
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treatment provided by	Plazi
scientific name	Teleogryllus mitratus ( Burmeister, 1838 )
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Teleogryllus mitratus ( Burmeister, 1838) View in CoL

Figures 1 View FIGURE 1 , 2A–H View FIGURE 2 , 5A–C View FIGURE 5 , 6A–B View FIGURE 6 , 7A–C View FIGURE 7 , 8A View FIGURE 8 , 9A–B View FIGURE 9 , 10A–D View FIGURE 10 , 11A–B View FIGURE 11 ; Table 1a & b

Gryllus mitratus Burmeister, 1838: 734 View in CoL .

Teleogryllus mitratus View in CoL — Chopard 1961: 277 — Townsend 1980: 158.

Teleogryllus (Macroteleogryllus) mitratus View in CoL — Gorochov 1985: 11.

= Gryllus testaceus Walker, 1869 View in CoL . Lectotype male, China, Canton (NHM). Synonymy in Townsend (1980).

= Teleogryllus meghalayanus Lahiri and Ghosh, 1975 . Holotype male, India, Shillon (ZSI). Synonymy in Townsend (1980). Type locality: Asia-Tropical, Malaysia, Java

Type material: Lectotype —Java, 1 male ( MNHU). Designated in Townsend (1980).

Materials examined: 25 ♂ and 15 ♀. India: Punjab, IISER Mohali, 308m asl, 30° 39′49.36′′N 76° 43′ 43.83 ′′E; Uttar Pradesh, Chandan Chauki, 25km from Palia Kalan , 179m asl, 28° 29′ 14.7′′ N 80° 38′ 57.8′′ E; Kerala, Bekal Club , 12° 16′ 20.3′′ N 75° 6′ 47.4′′ E, 7m asl, 8km from Nileshwar Railway Station , 24.i.2017; Karnataka, Kadari, 25km from Karkala, 64m asl, 13° 13′ 19.4′′ N 75° 5′ 22.8′′ E collected and identified by R. Jaiswara & M. Jain, IISERM GoogleMaps .

[ India], Darjeeling (sic), 2 ♂, 10676 (dissected), 10677, identified T. mitratus by L. Desutter-Grandcolas, MNHN ; Darjeeling (sic), Singla, 2 ♀, 10672, 10673, MNHN .

Viet Nam, Hanoii [Phnom Penh], 1 male, 1916, G. Dupouy, identified T. testaceus by L. Chopard, dissected and identified T. mitratus by L. Desutter-Grandcolas, MNHN.

India, Chilka lake nr. Maludai, 1 ♀, 14.iv.14, N.A., MNHN .

[ India], Negungadu, 1 ♂ (10680, identified T. mitratus by L. Desutter-Grandcolas), 29.iv.37; 1 ♀, 13.v.37; 1 ♀, 12.v.37, at light, MNHN.

[ Viet Nam], Phu Long Thuong , 1 ♂, 18.iv.07, dissected and identified T. mitratus by L. Desutter-Grandcolas, MNHN .

[ Viet Nam], Phu Song , Annam, 1 ♂ (dissected and identified T. mitratus by L. Desutter-Grandcolas), 1 ♀ (10650), xi–xii, H. Rolle, Berlin SWU, MNHN .

[ Viet Nam], Annam, 1 ♂ (10603, dissected by L. Chopard) , 1 ♀ (10634), identified T. mitratus by L. Desutter- Grandcolas, MNHN .

Indochine [ Viet Nam], Phnom Penh, 1 ♂ (1644, identified T. mitratus by L. Desutter-Grandcolas), 1 ♀, E. Irai, MNHN .

Emended diagnosis: Inner margins of eyes with thin or no yellow band; pronotum lateral lobe yellow with rufous-brown anterior margin and blackish-brown posterior margin ( Fig. 2B View FIGURE 2 ). Male. FW length varying between 6 th –9 th abdominal tergite; stridulatory file with an average number of 185±29 (n=19) teeth; harp with 4–6 veins usually (occasionally 3); mirror wider than long. Male genitalia: in dorsal view, pseudepiphallic median process longer than lateral processes and narrowing posteriorly ( Fig. 10A–C View FIGURE 10 ). Female. FW length restricted to 5 th –9 th abdominal segment; ovipositor slightly shorter than body length. Copulatory papilla sclerotized to 3/4 th of its length, anterior part membranous ( Fig. 11A–B View FIGURE 11 ).

Emended Description: In addition to the characters of the genus: Large species. Legs. TI with a pair of ventral apical spurs, outer spur smaller than inner; one inner dorsal apical spur. TII with a pair of ventral and dorsal apical spurs, inner spurs smaller. FIII distally tapering; TIII inner ventral spur slightly longer than outer; sub-apical spurs on inner margin 5–6 and outer 6–7 (most often 6 on both sides). Basitarsomeres III with 4–5 spines on inner margin and 4–7 spines on outer. Color. Head dorsum and pronotum rufous to dark brown. Face yellow to light brown. Scape basally brown; occiput with no or faintly visible vertical yellow strips; thin yellow line, and inner margin of eyes ( Fig. 10D View FIGURE 10 ). Palpi light brown ( Fig. 2C View FIGURE 2 ). The area below median ocelli sometimes with a pair of brown dots. Pronotum dorsal disc same color as head; lateral lobe yellow with rufous-brown anterior and black-brown posterior margin ( Fig. 2B View FIGURE 2 ). Fore and midleg yellow with brown setae. Hindleg yellow to light brown.

Male. FW mostly extended to 9 th abdominal tergite, sometimes extended slightly beyond but restricted before the posterior margin of epiproct; HW length shorter than FW or very long extended beyond the abdomen. Stridulatory file with 158 to 199 teeth (mean 178, n=6); teeth on the file vein longer than wide and usually curled on either ends lengthwise ( Fig. 8A View FIGURE 8 ). FW with 4–6 harp veins (rarely 3), first two veins strongly bisinuated; diagonal vein straight, chord veins regularly spaced ( Fig. 7A–C View FIGURE 7 ). Mirror mostly wider than long, most often divided into two cells by a vein. Apical field long and oval on posterior margin, with five cell alignments. Lateral field with 11–15 veins. Sub genital plate longer than high in lateral view ( Fig. 2E View FIGURE 2 ); supra-anal plate wider than long, apically trapezium-shaped ( Fig. 2F View FIGURE 2 ). Male genitalia. Pseudepiphallus long and acute posteriorly. In lateral view, apical part pointed and bulged high in the middle ( Fig. 10B View FIGURE 10 ); in dorsal view, part of pseudepiphallus as crests on either side of the median structure, the lateral crests much shorter in length ( Fig. 10A View FIGURE 10 ); lateral margin of pseudepiphallus very convex; apodemes of pseudepiphallus very long, anteriorly acute and twisted from the middle of their length; pseudepiphallic parameres long. Rami straight to slightly convex on its length, with shallow bifurcation posteriorly. Ectophallic fold very long, sclerotized; either thin filament-like structure extended way beyond posterior margin of pseudepiphallus or shorter and not filament-like. Dorsal cavity long.

Female. Body size either as that of male or bigger. FWs of variable length extended to 4 th to 8 th abdominal tergite; dorsal field with 11–13 diagonally parallel longitudinal veins; dorsal and lateral fields reddish-brown, the area between MA and MP yellow; lateral field with 11–15 yellow-colored veins ( Fig. 9A–B View FIGURE 9 ). Ovipositor almost of the body length or slightly smaller.

Female genitalia. Copulatory papilla mostly sclerotized as in Fig. 11A–B View FIGURE 11 . Anteriorly conical shaped and membranous, posteriorly square-shaped and sclerotized.

Remarks: It may be noted that the stridulatory file is variable in the mean number of teeth. In the population of IISERM=180±13, CC= 174±27 and KAD= 195±45.

The specimens of T. mitratus observed by Lu et al. (2018) are similar in colouration and size, except for shorter ovipositor in female (17–19 mm against 21.1 to 24.2 mm), which globally covers the variability of ovipositor length in the species mentioned by Townsend (1980).

The pseudepiphallus of the male genitalia of T. mitratus from Kadari often possessed an additional small bulge sub-apically that can be seen clearly in the lateral view. A similar bulge was observed by Lu et al. (2018) also in the specimens of T. mitratus .

Acoustic signal: Dominant frequency of males calling song from IISERM, CC, and KAD is 3±0.2 kHz (mean ±SD); however, the number of syllables varied from 2–6 per chirp.

* HW of T. mitratus females collected from Kadari always shorter than their FW’s.