Mogannia tenebrosa Lee and Marshall sp., 2023

Lee, Young June, Marshall, David C., Mohagan, Alma B., Hill, Kathy B. R. & Mohagan, Dave P., 2023, Revised checklist of Cicadidae (Insecta: Hemiptera) of Mindanao, Philippines, with descriptions of a new genus and nine new species, Journal of Natural History 57 (1 - 4), pp. 193-242 : 228-232

24. Mogannia tenebrosa Lee and Marshall sp. nov.

( Figures 15 , 16 )

Type material

Holotype. Male, specimen code 12.PH. MN.CAB.01, PHILIPPINES, Mindanao, Cateel / Compostela Rd., nr bdry, 646 m, 07°40.39 ʹ N, 126°12.77 ʹ E, 6 May 2012, K.B. R. Hill, D.C. Marshall and A.B. Mohagan ( NMPM).

Paratypes. 1 male, same location as holotype, genitalia dissection G103 ( UCONN); 1 male, specimen code 12. PH. MN.HWM.01, PHILIPPINES, Mindanao, W side Mt . Hamiguitan, Ca. 1.5 h up trail from Tumalite, 282 m, 06°43.95 ʹ N, 126°08.13 ʹ E, 26 April 2012, K.B. R. Hill, D.C. Marshall and A.B. Mohagan ( UCONN) .

Etymology

The specific name is a Latin feminine adjective meaning ̍dark̾, in reference to the darkcoloured body and the base of the fore wings of this species.

Measurements of types (2 males, holotype (larger) and paratype from Mt.

Hamiguitan)

Length of body: 12.5 (11.2–13.7). Length of head and thorax together: 6.3 (5.4–7.1). Length of abdomen: 6.2 (5.8–6.6). Width of head including compound eyes: 3.2 (3.1–3.2). Width of pronotum: 4.6 (4.1–5.0). Width of mesonotum: 4.0 (3.6–4.4). Width of abdominal tergite 3: 5.3 (4.6–5.9). Length of fore wing: 15.4 (14.0–16.8). Width of fore wing: 5.2 (4.8–5.5). Wing span: 33.4 (30.8–36.0).

Description of male

Head black to fuscous; narrow, much narrower than mesonotum. Distance between lateral ocelli and compound eyes slightly shorter than distance between lateral ocelli. Antenna mostly dull ochraceous but with black pedicel and scape. Postclypeus greatly protruding anteriad. Rostrum with small dull ochraceous patch proximally, with apex slightly passing beyond posterior margin of mid coxae.

Thorax including cruciform elevation black to fuscous. Anterolateral pronotal collar not dentate. Fore-, mid- and hind coxae each with light green distal membrane.

Wings: Fore wing partly hyaline with venation ochraceous except for basal half of costal vein pinkish brown and with broad dark brown patch on basal half of fore wing. Basal cell tinged with pinkish brown. Basal membrane pinkish brown. Hind wing hyaline. Hind wing costal cell, radial cell and medial cell with small pinkish brown patch basally. Vannus with pinkish brown patch basally on about basal one-fourth. Hind wing jugum pinkish brown.

Operculum black to fuscous; hook- or meniscus-shaped, with length of 2.5–3 times the width, with apex heading towards centre of body; not reaching posterior margin of abdominal sternite II. Opercula nearly touching each other medially.

Abdomen wide and short, about as long as head and thorax together; mostly black with small reddish brown patches, especially on median and sublateral parts. Tergite 3 much wider than pronotum. Timbal cover black but tinged with reddish brown, very small, triangular with anterior angle rounded, wider than long. Timbal mostly exposed. Abdominal sternites dark brown to reddish brown with black caudal margin on each of sternites II–VII. Sternite VIII and epipleurite VIII nearly red.

Genitalia. Pygofer circular in ventral view. Dorsal beak narrow and long. Uncus short with widely concave apex. Median clasper process extending posteriad in ventral view, but curved inward in lateral view. Lateral clasper lobe short. Aedeagus with spine-like processes apically. Distal shoulder with short triangular tooth in lateral view. Upper lobe uncurved, with rounded apex in lateral view. Basal lobe indistinct.

Remarks

This species resembles Mogannia conica (Germar, 1830) (TL: Java) because its fore wing also has a broad dark-coloured patch halfway from the base, but M. conica has the reddish postclypeus (vs black in the new species),narrower patch on the fore wing, smoothly rounded distal shoulder of the male pygofer (vs with a short triangular tooth in the new species), and a lobe-like process under the lateral clasper lobe (vs absent in the new species).

Also similar is Mogannia funettae Boulard, 2008 from northern Thailand, but like M. conica , M. funettae has the fore wing basal cell clear or tinged with bright colour rather than infuscated with dark brown to match the remainder of the basal fore wing (see Boulard 2013). As discussed below, the song of Mogannia tenebrosa Lee and Marshall sp. nov. also suggests a relationship to M. funettae .

This species is similar also to Mogannia formosana Matsumura,1907 because of the blackish body colour and the brownish patch on the fore wing, but M. formosana has a much more brightly coloured patch on the fore wing and light colouration on the ventral side of the body.

Two other Mogannia previously recorded from the Philippines are Mogannia indigotea Distant, 1917 (TL: Tonkin) and Mogannia viridis ( Signoret, 1847) (TL: Java) although we suspect that they are not distributed in the Philippines. Both differ from M. tenebrosa in the main body colour ( M. indigotea is dark indigo blue, and M. viridis green to ochraceous). While the dark body colour of M. indigotea could be confused in poorly preserved specimens, the fore wing colour pattern is different, with some sections of the fore wing hyaline or tinted in indigotea but fully infuscated in tenebrosa (see Chen et al. 2012).

Song ( Figure 16 )

The song of the holotype male was recorded and is illustrated here. The sound is a highpitched staccato buzz that continues indefinitely (at least 62s in our recording). Syllables containing approximately six pulses each are closely grouped or coalesced into echemes comprising four syllables, with the beginning and ending pulses of each syllable sometimes overlapping. The syllables are produced at about 200/s, and the echemes at about 20/s. There is minor amplitude modulation that helps to define the syllables,but otherwise sound intensity and frequency are not regularly modulated.The frequency spectrum is broad,reaching from at least 8 kHz to above 20 kHz, but most energy is concentrated within the range 8–12 kHz. The dominant frequency is about 10 kHz.Males were observed to sing while perching on the upper sides of leaves, as noted by Boulard (2013) for other Mogannia in Thailand.

No songs have been published previously for the genus Mogannia in the Philippines. The song of M. funettae , as shown in Boulard (2013), is very similar to that of M. tenebrosa , differing mainly in having a somewhat faster echeme repetition rate of about 28/s and inter-echeme intervals that are about the same duration as the echemes themselves.

Figures

Figure 15. Mogannia tenebrosa Lee and Marshall sp. nov., holotype, male, Mindanao, Philippines. (A) Dorsal habitus; (B) ventral habitus; (C) pygofer, oblique ventral view.

Figure 16. Mogannia tenebrosa Lee and Marshall sp. nov. Waveforms (A, C) of male calling song at two time scales, the former with accompanying spectrogram (B).