Cebrenninus berau, 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 : 181-183

Cebrenninus berau sp. nov.

Figs 4-5, 10 , 13-16 , 30-31, 33-34

Cebrenninus rugosus .– Ramírez, 2014: 223, fig. 151d. Misidentification.

Holotype: MHNG; male; Indonesia, East Kalimantan Province, Berau District, 1 km off road Tanjungredeb to Tanjungselor, ca 45 km N of Tanjungredeb, 2°29′33″S, 117°28′46″E, 190 m, primary forest; 29.9.2008 to 3.10.2008; leg. P. Schwendinger (sample IND-08/07).

Other material examined: RMNH.ARA.17165; 1 male, 1 female, 6 juveniles; Indonesia, North Sumatra, Gunung Leuser, Bohorok, litter; 10.08.1982; leg. C.L. and P.R. Deeleman. – RMNH.ARA.17166; 6 males, 12 females; Indonesia, North Sumatra, Gunung Leuser, Ketambe; 2.-4.03.1986; leg. Suharto Djojosudharmo; second date given on label 3.-5.04.1986, trail 64; in addition to the above listed specimens, this sample contained several specimens of C. phaedrae sp. nov. – RMNH.ARA.17167; 8 males, 4 females; same locality and collector, lowland leaf litter; 01.05- 09.08.1986; in addition to the above listed specimens, this sample contained several specimens of C. phaedrae sp. nov. – MHNG; 2 males, 11 females, 9 juveniles, collected with the holotype (sample IND-08/07). – RMNH. ARA.15944; 1 male (damaged, opisthosoma missing, left palp missing); East Malaysia, Borneo, E. Sabah, Danum Valley Field Centre, primary forest, dung trap; 1991; leg. Andrew Davis.

Diagnosis: Similar to C. phaedrae sp. nov. and C. kalawitana comb. nov., distinguished from these and other known congeners by distinctive shape of E (broad base, slightly enlarged in the center, finely tapered towards tip, tip slightly enlarged; Figs 13, 15 ), C (curved margins, hooked tip; Figs 13 , 30 ) and RTA (hooked tip; Figs 13-16 , 31 ). Females can be distinguished by the oval spermathecae and by the short CD that seems to be a bit longer than the width of the wall of the S ( Figs 33-34 ). Moreover, both sexes of this species are larger and darker in color than C. phaedrae sp. nov.

Etymology: The species name is a noun in apposition taken from the name of the district in which the type locality lies.

Description: Male: Total length: 3.1; prosoma length: 1.5, width: 1.4. Leg I: femur 1.8, patella 0.6, tibia 1.7, metatarsus 1.2, tarsus 0.8. Prosoma red-brown, rounded, six eyes, PME absent, LE on light browncolored mounds, mounds distinct but not touching ( Fig. 4 ). Opisthosoma dorsally with irregular black diffused spots, two pairs of brown circular spots towards the center, laterally black spots connect to form bands ( Fig. 4 ). Legs uniformly yellow-brown. Leg formula 1243, ALE> PLE> AME, AER and PER recurved. Palps as in Figs 13-16 , 30-31 . Cymbium of the male palp lack trichobothria.

Female: Total length: 3.3-4.0; prosoma length: 1.5-1.7, width: 1.3-1.5. Leg I: femur 1.8, patella 0.5, tibia 1.5, metatarsus 1.0, tarsus 0.7. In general similar to male. Epigynum and vulva as in Figs 33-34 . Spermathecae oval, CD short.

Distribution: Known from localities in northern Sumatra and eastern Borneo.

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 13 - 16. (13 - 14) Cebrenninus berau sp. nov., male from Sabah, right palp (13 ventral, 14 retrolateral view). (15) C. berau sp. nov., holotype from Berau District, left palp, ventral view. (16) Same palp, RTA, retrolateral view. Scale lines = 0.2 mm.

Figs 27 - 34. (27 - 29, 32) Cebrenninus kalawitana comb. nov from the Philippines. (30 - 31, 33 - 34) C. berau sp. nov., male from Indonesia, Berau District. (27 - 32) Left male palp. (28, 30) Conductor. (29, 31 - 32) RTA. (33) Female epigynum. (34) Vulva. (27 - 31, 33 - 34) Ventral view. (32) Retrolateral view. Scale lines = 0.1 mm (28 - 31), 0.2 mm (27, 32 - 34).