Bioacoustics of Comptaphyllium riedeli

Description. The description of the colouration is based on the appearance of the HT immediately after its death. The eggs used for the description were laid by the HT in captivity. ♀ ( Fig. 1 ). Small-sized for the subgenus (body length 56.3 mm ) with a moderately broad abdomen (maximum width 23.0 mm) gradually tapered towards the apex from segment IV onwards. Exterior lobes of the profemora ( Fig. 4C ) narrow and rounded, interior lobes dentate and roundly triangular. Colouration. Living HT mostly green with pale dark red speckles on tegmina. Ventral body surface generally darker. Alae (a) transparent ( Fig. 3E ). Antennae (from antennomere II onwards), tips of labial and maxillary palpi and tubercle (pmt) on posteromedian head capsule pale dark red ( Fig. 2D ). Compound eyes with reddish/dark brown pattern ( Fig. 2A ). Mesopleurae (mp) pale dark red, anterior-most spiniform tubercles of meso-praescutum (mps) dark green ( Fig. 3C ). Fine light green median line extending from posterior abdominal segment II to VIII. Distinct white spot with brown frame on the posteromedian ventral abdominal segment I. Similar, but smaller triangular-shaped spots at segments V and VI. Large light spots in the center of each side of abdominal segment V, best visible ventrally but also dorsally below the tegmina. Abdomen with a thin, brownish frame extending from abdominal segment IV towards the apex. Segment IX dorsally with dark red spots extending to the lateral margins. Ventral coxal surfaces green ( Fig. 4B ), dorsal surface of procoxae and protrochanters brown. Interior lobes (fil) of profemora ( Fig. 4C ) with yellowish/brownish-red pattern at dentate side. Dorsal part of the exterior lobes (fel) of profemora brownish-red (coxal margin) to green (tibial margin). Protibial interior lobes (til) brownish-red with three yellowish lines perpendicular to the tibia ( Fig. 4C ). Propraetarsi pale dark red. Exterior lobes of mesofemora with a brownish spot on the proximal margin and three pale dark red spots of different sizes distally (proximodistal sequence: large, small, medium). Interior lobes of mesofemora exhibit a similar colour pattern as the profemora. Mesotibiae with a pale dark red spot near the proximodorsal margin. Colour pattern of metafemora very similar to mesofemora, but with a larger gap between the second and third distal spot of the exterior lobe. Metatibiae similar coloured to mesotibiae, but with reddish distal margin. Metatarsomeres I to IV reddish. Morphology. Head capsule ( Figs 2A,B ) broad with convex cheeks. Vertex smooth except for several granules, a distinct posteromedian tubercle (pmt) and small protuberances (pt) between compound eyes and antennal bases. Antennae ( Figs 2C,D ) moderately slender and elongate ( 3.4 mm ), longer than postocular section of head capsule ( 2.7 mm ) and consisting of nine segments. Apical antennomere (IX) cylindrical with rounded apex, about 2x longer than wide and ± 2x as long as VIII. Stridulatory file (pars stridens) on antennomere III with 25, stridulatory ridge (plectron) with 19 teeth ( Fig. 3E ). Pronotum ( Fig. 3A ) roughly squarish with slightly concave anterior margin and moderately convex lateral and posterior margins. Anterior margin of pronotum thickened, in particular around the openings of the prothoracic defensive glands. Prosternum smooth, except for some minor granules ( Fig. 3B ). Meso-praescutum (mps) almost as long as wide (length-width ratio 1.1: 1), gently narrowing towards posterior ( Fig. 3C ). Lateral margins armed with few spiniform tubercles of variable sizes, the larger ones located near the anterior margin. Disc with 8 ± prominent tubercles. Mesopleurae (mp) strongly and gradually diverging; their lateral margins with five distinct spiniform tubercles ( Fig. 3C ). Anterior mesosternum sparsely and irregularly granulose ( Fig. 3D ). Tegmina (length 31.2 mm , max. width 12.3 mm ) extending over 1/3 of abdominal segment VII. Alae (al) rudimentary (length 6.7 mm , max. width 2.6 mm ), roughly 1/5 the length of tegmina ( Fig. 3E ). Abdominal segments II–IV gradually widened, IV widest segment, first 1/3 gradually diverging. V–X gradually tapering towards the apex. Anal segment (X) ± as long as wide with rounded apex. Subgenital plate (sp) rather short, slightly projecting over the posterior margin of abdominal segment IX ( Fig. 4A ). Profemora ( Fig. 4C ) with a narrow and rounded exterior lobe (fel). Interior lobe (fil) dentate, roundly triangular and distinctly wider than exterior lobe. Protibiae ( Fig. 4C ) without exterior lobe, interior lobe (til) roundly isosceles triangular (angle> 90°). Exterior and interior lobe of meso- and metafemora gently rounded, with the exterior lobe narrower than the interior lobe. Protarsus about 5/4 the length of the protibia, probasitarsus roughly 2x longer than wide. Measurements [mm]: Length of body 56.3, length of head 5.0, length of pronotum 3.9, length of mesonotum 4.5, length of tegmina 31.2, greatest width of tegmina 12.3, length of alae 6.7, greatest width of abdomen 23.0, length of profemora 8.4, length of mesofemora 7.8, length of metafemora 9.1, length of protibiae 5.2, length of mesotibiae 5.9, length of metatibiae 6.6, length of antennae 3.4. Eggs ( Fig. 5 ). Remarkably large when compared to the size of the female. Overall colouration light brown. Lateral surfaces smooth and slightly glossy. Ventral surface with a single longitudinal median lamella (vml) (length 2.9–3.2 mm ) consisting of loosely agglutinate hairy or moss-like appendages. Polar area with two very prominent feather-like appendages (pa) (height 1.2–1.8 mm ) apparently consisting of thin tightly agglutinate hairy filaments. Dorsal surface generally flat and smooth, with two similar larger and roughly triangular appendages (da; height 1.9–2.2 mm ) longitudinally flanking the micropylar plate (mp). Micropylar plate elliptical with pointed ends and slightly impressed ( Fig. 5B ). Micropylar cup (mc) at the posterior end of micropylar plate. Operculum (op) almost circular and slightly convex, with a crown (c) of small hairy appendages ( Fig. 5C ). Medially with a single lamella similar to the one at egg’s the ventral side. Measurements including feather-like structures and lamellae [mm]: length (including operculum) 5.6–5.9, length 4.8–5.3, width 2.3–2.6, height 4.1–4.3, length of micropylar plate 2.4–2.6.