Monseremus bellus (Tan & Wahab, 2018) Tan & Japir & Chung & Robillard, 2022

Tan, Ming Kai, Japir, Razy, Chung, Arthur Y. C. & Robillard, Tony, 2022, A review of the genus Monseremus Ingrisch, 2018 (Orthoptera, Stenopelmatoidea Gryllacrididae) from Borneo, Zootaxa 5165 (1), pp. 107-114 : 112-113

Monseremus bellus (Tan & Wahab, 2018) new combination

( Figs 2D–F , 3C, 3D )

Melaneremus ? bellus Tan & Wahab, 2018: 584

Melaneremus (?) sp. — Tan & Wahab, 2018b: 132

Melaneremus bellus — Cadena-Castañeda 2019: 79

Material examined. Holotype: BRUNEI DARUSSALAM:• ♀; Ulu Temburong National Park, Kuala Belalong Field Studies Centre , primary ridge dipterocarp forest; N4.54731, E115.15697, 103.9± 8.7 m.a.s.l.; on foliage of tree; 26 July 2017, 20h31; coll. M. K. Tan (KB.17.76, ZRC).

Paratypes: BRUNEI DARUSSALAM: • 1♀; Ulu Temburong National Park, Kuala Belalong Field Studies Centre , primary ridge dipterocarp forest; N4.54629, E115.15680, 133.9±9.0 m.a.s.l.; on rattan leaf; 23 September 2016; 21h49; coll. M. K. Tan (KB.16.20, ZRC) • 1♂; Ulu Temburong National Park, Kuala Belalong Field Studies Centre , primary ridge dipterocarp forest; N4.54706, E115.15720, 112.1±16.0 m.a.s.l.; on foliage of tree; 23 September 2016, 22h14; coll. M. K. Tan (KB.16.22, ZRC) • 1♂; Ulu Temburong National Park, Kuala Belalong Field Studies Centre , primary ridge dipterocarp forest; N4.54584, E115.15685, 103.3± 6.8 m.a.s.l., on foliage near ground; 25 July 2017, 21h30; coll. M. K. Tan (KB.16.63, ZRC) • 1♀; Ulu Temburong National Park, Kuala Belalong Field Studies Centre , primary ridge dipterocarp forest; N4.54730, E115.15703, 99.8±6.0 m.a.s.l.; on rattan leaf; 26 July 2017, 20h41; coll. M. K. Tan (KB.17.77, ZRC) • 1♂; Ulu Temburong National Park, Kuala Belalong Field Studies Centre , primary ridge dipterocarp forest; N4.54655, E115.15688, 101.9± 7.5 m.a.s.l.; on rattan leaf; 27 July 2017, 20h38; coll. M. K. Tan (KB.17.90, ZRC) .

Revised diagnosis. The male differs from that of M. appendiculatus by the medial processes of the tenth abdominal tergite: the inner margins and apices touching each other. The female differs from that of M. appendiculatus by the projections at the anterior margin of subgenital plate smaller, more flattened (in lateral view), and shorter in length than subgenital plate. Other minor differences include the male subgenital plate more transverse, ca. 2.5 times wider than long; the ovipositor <16.5 mm in length, shorter than M. appendiculatus .

Distribution. BRUNEI DARUSSALAM: Temburong

Ecology. This species is currently known to inhabit the lowland ridge dipterocarp forest.

Figures

FIGURE 2. Monseremus appendiculatus (A–C) and Monseremus bellus (D–F): female subgenital plate in ventral (A, D) and lateral (B, E) views; male abdominal apex in ventral view (C, F). Scale bars: 1 mm.

FIGURE 3. Monseremus appendiculatus (A, B) and Monseremus bellus (C, D): female abdominal apex in posterior view (A, C); female stridulatory files on second and third tergites (B, D). Scale bars: 1 mm.