Cebrenninus magnus, Suresh P. Benjamin, 2016

Suresh P. Benjamin, 2016, Revision of Cebrenninus Simon, 1887 with description of one new genus and six new species (Araneae: Thomisidae), Revue suisse de Zoologie 123 (1), pp. 179-200 : 185-188

Cebrenninus magnus sp. nov.

Figs 6-8 , 35-36, 38-45

Cebrenninus rugosus .– Tang & Li, 2010a: 23, figs 17a-c, 18a-e, 19a-d. Misidentification.

Cebrenninus rugosus .– Benjamin, 2011: figs 8b, e-f, 27a-b, d-e, 28a-f, 29a-f. Misidentification.

Holotype: MHNG; male; Laos, Champasak Province, Bolaven Plateau, NW of Pakxong, Tham Champee, 15°12′0 4″N 106°08′0 7″E, 980 m, secondary forest near stream; 2.10.2010, leg. P. Schwendinger (sample LT- 10/25).

Other material examined: CAS; 2 females; Thailand, southern Isan Region, Khao Yai National Park, 750 m, 26.07.1962; leg. E. S. Ross and D. Q. Cavagnaro. – RMNH.ARA.1594; 1 female; Nakhon Ratchasima Province, Khao Yai National Park, 800 m, 4.11.1987, evergreen forest; leg. C. L. and P. R. Deeleman. – RMNH.ARA.17168; 1 female; Nakhon Ratchasima Province, Khao Yai National Park, 800 m, under bark, killed 19.11.1987; 6.11.1987, leg. C. L and P. R. Deeleman. – MHNG; 1 male; Chiang Mai Province, near Chiang Mai, Doi Suthep, 1150 m; 30.11.1996, leg. P. Schwendinger. – MHNG; 1 male, 1 female; Chumphon Province, near border between Lang Suan and Phato Districts, Khao Kai Jae Waterfall, 80 m, semi-evergreen rainforest; 21.- 22.08.2004, leg. P. Schwendinger. – MHNG; 1 female; Chiang Mai Province & District, near Chiang Mai, Doi Suthep, below Tham Rüsie, 18°48′18″N 98°55′0 2″E, 1190 m, evergreen hill forest; 31.01.2011, leg. P. Schwendinger (sample THMY-10/10). – MHNG; 1 male, 1 female; Phetchabun Province & District, Tad Mok National Park, near Tad Mok Waterfall, 16°22′0 2″N 101°23′0 2″ E, 900 m, evergreen gallery forest on earth banks; 25.12.2013, leg. P. Schwendinger (sample TH-13- 14/03). – RMNH.ARA.15940; 1 male; Indonesia, Java, West Java, Puncak Pass, 1500-1600 m; leg. P. Beron and V. Beshkov, no more label data. – RMNH.ARA.15924; 1 male; E-Malaysia, Borneo, West Sarawak, Bako National Park, rain forest, 1.7167°N, 110.4667°E, on slope; leg. C. L. and P. R. Deeleman. – RMNH. ARA.17169; 1 subadult female; E-Malaysia, Borneo, West Sarawak, Semenggoh Arboretum, walking on bark; 10.01.1984, leg. C. L. and P. R. Deeleman.

Diagnosis: Distinguished from known congeners by the larger size (length: 4.7-5.3) and by the distinctive shape of E (filiform; fine tapered tip; Figs 35 , 45 ), C (broadest approximately at the center, apical half curved, slightly broader at the tip; Figs 35-36 , 41, 45 ) and RTA ( Figs 35-36 , 44 ). Females can be distinguished by the round CO and S ( Figs 38-39 ).

Etymology: The specific name refers to the size of the spiders.

Description: Male: Total length: 4.7-5.3; prosoma length: 2.2-3.1, width: 2.0-2.4. Leg I: femur 3.3, patella 1.0, tibia 3.3, metatarsus 2.3, tarsus 1.3. This species was described in detail by Tang & Li (2010a) and Benjamin (2011) under C. rugosus and thus is not dealt further here.

Distribution: Known from localities in China ( Tang & Li, 2010a), Laos, Thailand, on Java and western Borneo.

Natural history: Probably a bark dweller; often collected on or under bark.

Figures

Figs 4 - 12. (4 - 5, 10) Cebrenninus berau sp. nov. from Indonesia, Berau District. (6 - 8) C. magnus sp. nov., holotype. (9, 11 - 12) C. rugosus (9, 12 from Pagat, 11 male lectotype; MNHN 8652 / 1572). (4, 8, 12) Male, dorsal view. (5, 11) Female, dorsal view. (6 - 7, 9) Left male palp (6 retrolateral, 7, 9 ventral view). (10) Epigynum, ventral view. Scale lines = 0.2 mm (6, 9, 10), 0.5 mm (7, 11), 1.0 mm (4 - 5, 12), 2.0 mm (8).

Figs 35 - 39. (35 - 36, 38 - 39) Cebrenninus magnus sp. nov. (37) C. rugosus (lectotype). (35 - 36) Male from Thailand (MHNG), left palp (35 ventral, 36 retrolateral view). (37) Male palp, retrolateral view. (38 - 39) Female from Thailand. (38) Epigynum, ventral view. (39) Vulva, dorsal view. Scale lines = 0.1 mm (38 - 39), 0.2 mm (37), 0.5 mm (35 - 36).

Figs 40 - 45. Scanning electron micrographs of Cebrenninus magnus sp. nov., male from Sumatra (MHNG), right male palp. (40, 43 - 44) Retrolateral view. (41, 45) Ventral view. (42) Prolateral view. Scale lines = 10 μm (44), 100 μm (40 - 43, 45).