Bioacoustics of Pemba paleovarzeana

Measurements (mm). Holotype ♂ : TL: 32,9; TegL: 48,6; TegH: 11,1; WF: 4,1; PL: 11,3; FF: 13,6; FT: 13,4; MF: 13,6; MT: 13,6; HF: 32,8; HT: 35,6; Lplac: 3,8; LC: 3,4. Calling song ( Fig. 7 ). The species calling sound consists of a short phrase, with three syllables with moderate increasing intensity during the sound production. This signal lacks a regular temporal pattern, as males were observed to emit calls at irregular intervals throughout the night under captive conditions. The phrase is 0.04 ± 0.003 ( 0.0373 –0.0465 ) seconds duration, with three syllables each. The syllables have different durations and intervals between them, so they were analyzed independently. Syllable 1, shorter and with less intensity (dB), is 0.008 ± 0.0008 ( 0.007 –0.009 ) seconds duration. Syllable 2, with average values between syllables 1 and 3, has a duration of 0.011 ± 0.005 ( 0.010 –0.012 ) seconds. Syllable 3, which lasts longer and has greater intensity, has a duration of 0.15 ± 0.002 ( 0.011 –0.018 ) seconds. As with syllable duration, the interval between each syllable also varies; therefore, these parameters were analyzed independently. Interval 1, between syllable 1 and syllable 2, has 0.002 ± 0.0005 ( 0.001 –0.003 ) seconds duration, while interval 2, between syllable 2 and syllable 3, has 0.003 ± 0.0005 ( 0.002 –0.004 ) seconds duration.

Description. Holotype Male. Head . Head elongated, with frons and gena smooth, in frontal view ( Fig. 3B ); fastigium-vertex small and laterally bilobated, in frontal view ( Fig. 3B ); Globular eyes ( Figs. 3B–D ). Scape broad, rectangular, with a large posterior spine on the inner margin, the apex reaching almost half the length of pedicel ( Fig. 3B ). Thorax. Pronotal disc subrectangular and rough, anteriorly convex with a median acuminate projection, laterally rounded with sinuous margins, and posteriorly triangular with a median projection, in dorsal view ( Fig. 3C ); Anterior median region, posterior region, and carinae with several projections of varying sizes, the largest being the anterior and posterior median ones; the anterior median projection is elongated, acuminate, and recurved toward the dorsum of head; the projection of the posterior dorsal shield bears at least five large subtriangular projections with blunt apices. Additionally, in the dorsomedian region of the pronotal disc, there are two pairs of small, blunt, lateral projections, in lateral and dorsal views ( Figs. 3C–D ). Mesobasisternum triangular-shaped, anteriorly straight and posteriorly narrow ( Fig. 3G ). Lateral lobes of mesobasisternum anterolaterally concave, laterally straight and posterolaterally concave ( Fig. 3G ). Metabasisternum triangular-shaped, anteriorly straight and posteriorly narrow ( Fig. 3G ). Lateral lobes of metabasisternum anterolaterally and laterally straight and posteriorly slightly convex ( Fig. 3G ). Wings. Tegmina long, broad, slightly curved, with an angulated apex. Region of the main veins darker, with clusters of small, asymmetrical white spots in the median portion of tegmina ( Fig. 4 ). Vein R slightly curved with several branches, branches almost straight reaching anterior margin of tegmina. Vein MA bifurcated near apex. Vein MP medially connected to vein MA by five transversal veins, forming a large rectangular-shaped cell. Vein MP slightly sinuate, parallel to posterior margin of tegmina, posteriorly with five bifurcated touching posterior margin of tegmina. Vein CuA and CuP slightly sinuous, parallel to ventral margin of tegmina, connected by small transversal veins, forming several rectangular cells ( Fig. 4 ). Left stridulatory file curved with numerous small narrow teeth close together; apical and basal teeth shorter than medial teeth ( Fig. 5 ). Legs . Fore and mid legs thin and straight ( Figs. 3F–G ). Fore femur with portion median to the apical region with four ventral triangular black spines; fore tibia with eight small ventral spines, in lateral view ( Fig. 3F ). Mid femur slightly recurved at the apex with four large ventral triangular black spines, with increasing size from base to apex, in lateral view ( Fig. 3G ). Mid tibia with basal region slightly wide with three small dorsal spines; ventral side of tibia with six straight short spines, in lateral view ( Fig. 3G ). Hind femur elongated, with the apical region slightly curved outwards; ventral region with nine large ventral triangular recurved black spines pairs of black spines, in lateral view ( Fig. 3H ). Hind tibia slightly curved, with dorsal and ventral region with two rows of several short and curved spines, in lateral view ( Fig. 3A ). All legs with short bristles ( Figs. 3A, F–H ). Abdomen . Tergite X posteriorly slightly concave ( Fig. 3J ). Cerci broad, slightly recurved inwards and decreasing in thickness at apex, where they terminate in a small curved spine, in dorsal view ( Fig. 3I–K ); apex of cerci exceeding base of styli; cerci with several large bristles ( Figs. 3H–J ). Subgenital plate subrectangular, laterally slightly curved and posteriorly bilobated, zone between base of styli triangular ( Fig. 3I ). Styli small and elliptical ( Fig. 3I ). Internal male genitalia. Not examined. Coloration. Description based on photos of live specimens ( Fig. 6 ). General coloration dark brown, with variations of light and dark brown in some regions. Eyes light brown. Lateral sides of frons, area behind the eyes, dorsal region of pronotal disc, and stridulatory region of tegmina light brown, alternating laterally with a very dark brown area. Apical region of femora light brown; mid tibia with a dorsal light brown stripe; hind femur with two transverse light brown bands, one median and one apical. Abdomen and cerci dark brown with lighter, asymmetric spots. Female: Unknown.