Marmessoidea Brunner von Wattenwyl, 1893

Ho, Wai-Chun George, 2018, New taxa of Necrosciinae from Vietnam (Phasmatodea: Diapheromeridae), Zoological Systematics 43 (2), pp. 178-189 : 182-184

3.3 Marmessoidea Brunner von Wattenwyl, 1893

Marmessoidea Brunner von Wattenwyl, 1893: 85 (= Trigonophasma Kirby, 1904 ). Type species: Necroscia marmessus Westwood, 1859: 49 (= Marmessoidea rpsea ), by original designation.

Diagnosis. Medium-sized Necrosciinae. Body unarmed, thorax with granulation, female distinctly larger and more robust than male. Head oval. Vertex and occiput convex. Antennae filiform and very long. Pronotum rectangular. Mesonotum slender and elongate, longer than combined length of metanotum and median segment. Abdomen cylindrical. Anal segment emarginated posteriorly in both sexes. Female subgenital plate short, scoop-shaped, distinctly notched posteriorly. Male poculum cup-shaped. Cerci long and cylindrical. Legs unarmed, slender and elongate. Profemora distinctly incurved basally. Tegmina and alae fully developed. Egg oval with rounded posterior pole, ventral surface flattened.

Distribution. China, India, Indonesia, Malaysia, Philippines, Singapore and Vietnam.

Remarks. Currently seven species and two subspecies are recognised in Vietnam. A key to the species of genus is provided.

Key to males of Marmessoidea Brunner von Wattenwyl, 1893 .

1. Tegmina with a medial spine............................................................................................................ M. bispina ( Redtenbacher, 1908)

Tegmina lacking medial spine.............................................................................................................................................................. 2 2. Legs banded ..................................................................................................................................................... M. liuxingyuei sp. nov.

Legs with or without black apices, other area uniformly coloured.......................................................................................................3 3. Legs green............................................................................................................................................................................................ 4

Legs rufous ..........................................................................................................................................................................................6 4. Mesosternum reddish .......................................................................................................... M. haemorrhoidalis Redtenbacher, 1908

Mesosternum green ..............................................................................................................................................................................5 5. Mesonotum not more than 3 times longer than pronotum.......................................................... M. alata alata sp. nov. & subsp. nov.

Mesonotum more than 3 times longer than pronotum............................................................................ M. alata elongata subsp. nov. 6. Tegmina with a yellowish marking on posterior area..................................................................... M. biplagiata Redtenbacher, 1908

Tegmina lacking yellowish marking on posterior area......................................................................................................................... 7 7. Tibiae with black apices.......................................................................................................................... M. usta Redtenbacher, 1908

Tibiae without black apices................................................................................................................ M. incensa Redtenbacher, 1908

Key to females of Marmessoidea Brunner von Wattenwyl, 1893 .

1. Tegmina with a medial spine............................................................................................................ M. bispina ( Redtenbacher, 1908)

Tegmina lacking medial spine.................................................................................................... M. alata alata sp. nov. & subsp. nov.