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87Humanity space International almanac VOL. 9, No 2, 2020: 112-120 http://zoobank.org/urn:lsid:zoobank.org:pub:152164E9-8052-4039-BAED-E3B74A65FDE9
A new species of genus Xixuthrus Thomson, 1864 (Coleoptera, Cerambycidae) from Waigeo island
A.S. Zubov1, A.Yu. Titarenko2
'Bolotnikovskaya str., 6B, apartment 103, Moscow 117556 Russia e-mail: [email protected]
2Publicly Traded Company "Morpho Absoloni" Bolotnikovskaya str., 5/3, Moscow 117556 Russia e-mail: [email protected]
Key words: Coleoptera, Cerambycidae, Prioninae, Macrotomini, Xixuthrus, new species, Papua, Indonesia, Waigeo.
Abstract: Xixuthrus drumonti sp.n. is described from Waigeo island (Indonesia, Papua). Introduction
Genus Xixuthrus is widely distributed through all Indonesia, Sothern Malaysia, Phillipines (Palawan), Papua New Guinea, Solomones, Fiji and Australia (Queensland). For the past 14 years a number of species have been described (Marazzi 2006, Missori 2018, Zubov, 2018). Species differ well by the number of characters as antennae and foreleg length, males mandible size, pronotum and elytra shape, prothorax process shape, etc. New species comes from Waigeo island that is high in endemic species among different groups of beetles. New species is very close to X. axis Thomson, 1877 but number of features show it's a separate species.
Material and methods
The authors have used methods of morphological examination. Comparative analysis is made using stereo microscope Zeiss Stemi 2000-C.
The following abbreviations are used to locate the storage of type specimens:
AT - the private collection of Andrey Yu. Titarenko (Moscow, Russia) RBINS - Royal Belgian Institut of Natural Sciences (Belgium, Bruxelles)
Xixuthrus drumonti sp. n.
Figs 1-3, 7-9
Type locality. Indonesia, Papua, Waigeo island. Description. Holotype: male (length 61mm) dark brown; head, mandibles, 1st antennae segment almost black; pronotum and elytra covered in small adjacent golden hairs; head not big, almost long as wide, with short impression between the eyes; mandibles small, about % head length, in coarse dense puntuation; eyes big, round, cover almost 50% of head; pronotum trapezoid, 1,66 times wide as long; pronotum with small spines on the sides; pronotum punctuation very thin and dense, uneven; elytra 2,1 times long as wide, slightly widened in the middle; elytra suture black; each elytra with 4 well notable costae; elytra in coarse dense punctuation, punctuation on the base slightly coarser and denser, punctuation on the apex thinner, almost unvisible; legs thin; fore tibia slightly elongated, covered in long spines; legs dark brown, fore legs almost black; tarsi light brown, fore tarsi lighter then the others; antennae long, almost 5/6 length of the body; 1st antennal segment slighty thickened, in coarse punctuation; 1-3rd segements dark-brown, other part of antennae slightly lighter colored; 3-10th segments with small tooth on the apex; prothorax process thin.
Variation: second male's pronotum is slightly less trapezoid and less convex. Length 58mm.
Female (length 83 mm) dark brown; head, antennae and pronotum almost black. Head, pronotum and elytra covered in dense short recumbent goldish-brown hairs; almost long as wide, with short impression between the eyes; mandibles small, less than % head length, in coarse dense puntuation; eyes big, round, cover almost 50% of head; pronotum trapezoid, 2,1 times wide as long; pronotum with small spines on the sides; pronotum punctuation very thin and dense, uneven; elytra 2 times long as wide, slightly widened in the middle that makes them appear a little oval; elytra suture dark-brown; each elytra with 4 well notable costae; elytra in coarse dense punctuation, punctuation on the base slightly coarser and denser, punctuation on the apex thinner, almost unvisible; legs thin; fore tibia slightly elongated, covered in long spines; legs dark brown, fore legs almost black; tarsi light brown, fore tarsi lighter then the others;
antennae long, almost 5/6 length of the body; 1st antennal segment slighty thickened, in coarse punctuation; 1-3rd segements dark-brown, other part of antennae slightly lighter colored; 3 -10th segments with small tooth on the apex; prothorax process thin. Differencial diagnosis. Males: Head of X. drumonti sp.n is thinner than in X. axis; eyes ofX. drumonti big and round, cover almost 50% of the head, inX. axis eyes are smaller, little bit narrowed (Figs. 4-6). 1st antennal segment of X. drumonti is thinner than in X. axis. Antennae of X. drumonti are shorter in repect to body length about 5/6 of body length, in X. axis antennae are slightly longer, about 6/7 of body length. Antennae of X. drumonti are almost same dark-brown color, 1-3rd segments a little bit darkened, in X. axis 1-3rd segments almost black, other part of antennae are light brown. 3-10 segments of X. drumonti with small barely noticable teeth, in X. axis teeth are well expressed.
Pronotum of X. drumonti is a little bit narrower than elytra base, trapezoid, in X. axis pronotum is almost same width as elytra, rectangular.
Elytra of X. drumonti a little bit widened in the middle, in X. axis sides almost parallel.
Elytra and pronotum of X. drumonti covered in short golden hairs, X. axis covered in dense gray-brown hairs.
Fore legs of X. drumonti almost black, other legs are dark-brown, fore tarsi light brown, in X. axis legs are noticeable darker, almost black, fore tarsi dark brown.
Fore tibia apex of X. drumonti slightly widened, in X. axis apex is strongly widened.
Prothorax process of X. drumonti is 1,5 times narrower and less parallel and more rounded than in X. axis (Figs. 7-12). In X. axis process is more rectangular in both males ans females. Females: Pronotum of X. drumonti is more trapezoid, in X. axis is more rectangular.
1st antennal segment of X. drumonti is narrower, eyes bigger and more round than inX. axis.
Antennae ofX. drumonti dark, in X. axis light-brown. Hairs on pronotum and elytra ofX. drumonti darker than in X. axis. Discussion. The new specie is very close to X. axis and probably appears it's young relative. Future DNA analysis might make it
clearer due to their relation degree.
Type material. Holotype, male, Indonesia, Papua, Waigeo isl. -RBINS; 2 paratypes: 1 male, Indonesia, Papua, Waigeo isl., Waisai, 28.X.2018., Local collector - AT; 1 female, Indonesia, Papua, Waigeo isl., Waisai, Papua, Barat, 2.III.2019 - AT.
Etymology. The new species is named after Alain Drumont (Bruxelles, Belgium) for his contribution in study of
Prioninae, Cerambycidae.
Acknowledgements. We thank Alain Drumont (Bruxelles, Belgium) and Royal Belgian Institut of Natural Sciences for the help in working with the collection of the Museum and availability of future Holotype of Xixuthrus drumonti for study.
REFERENCES
Marazzi G., Marazzi V., Komiya Z. 2006. Nuovi Xixuthrina della Regione IndoAustraliana (Coleoptera Cerambycidae Prioninae). Descrizione di tre nuove specie di Xixuthrus provenienti dalla Papua-Nuova Guinea e considerazioni sul genere (Coleoptera Cerambycidae Prioninae). Alfonso Iorio Editore. Natura Edizioni Scientifiche, Ravenna: 10-33, figs 2, 4-8. Missori P., Ercoli L. 2018, A new subspecies of Xixuthrus from Papua New Guinea (Coleoptera: Cerambycidae, Prioninae). - Zootaxa. 4455 (2): 395-399. DOI: 10.11646/zootaxa.4455.2.9 Prioninae of the world, 2020. - URL: www.prioninae.eu/taxonomy. Species 2000. ITIS Catalogue of Life, 22nd March 2017. -
URL: www.catalogueoflife.org/col. Thomson J. 1877. Séance du 28 novembre 1877. [description d'une nouvelle espèce exotique de Prionide]. - Bulletin de la Société Entomologique de France. (5) 7: clxvii-clxviii.
Figs 1-2. Xixuthrus drumonti sp.n.:
1. Holotype male. Waigeo isl. (61 mm), 2. Paratype male. Waigeo isl., Waisai. (58 mm).
Figs 3.Xixuthrus drumonti sp.n.: 3.Paratype female. Waigeo isl. Waisai, Barat (83 mm).
Figs 4.Xixuthrus axis Thomson, 1877: 4. Male, Indonesia, Arfak (60 mm).
Figs 5-6. Xixuthrus axis Thomson, 1877: 5. Male, Indonesia, Arfak, (82 mm), 6. Female, Indonesia, Arfak, (72 mm).
7 8
9
Figs 7-9. Xixuthrus drumonti sp.n. prothorax process: 7. Holotype male, 8. Paratype male, 9. Paratype female.
" ■■¿f 12
Figs 10-12. Xixuthrus axis Thomson, 1877 prothorax process: 10-11. Males, 12. Female.
Received: 19.06.2020 Accepted: 22.06.2020
