Cebrenninus rugosus Simon, 1887

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 : 190-192

Cebrenninus rugosus Simon, 1887

Figs 17-20 , 57-64

Cebrenninus rugosus Simon, 1887: 468 . – Simon, 1897: 9, figs 1-2. – Tang et al., 2009: 40, figs 1a-f. Misidentification. – Tang & Li, 2010a: 23, figs 17a-c, 18a-e, 19a-d. Misidentification. – Benjamin, 2011: figs 8b, e-f, 27a, b, d-e, 28a-f, 29a-f. Misidentification. – Benjamin, 2011: figs 5c, 5f, 27c. – Ramírez, 2014: 223, fig. 151D. Misidentification.

Libania scabricula Thorell, 1890: 148 . Syn. nov.

Libania scabricula sulcata Thorell, 1890: 148 . Syn. nov.

Libania annulata Thorell, 1890: 149 . Syn. nov.

Libania armillata Thorell, 1890: 149 .

Type material: MNHN 8652/1572; male lectotype (examined); no locality data given. – MCSN; 2 female syntypes of Libania scabricula Thorell, 1890 (examined); Cibodas, Java, Indonesia; X.1873, O. Beccari. – MCSN; 2 females, 1 male, 1 juvenile syntypes of Libania annulata Thorell, 1890 syn. nov. (examined); Sumatra, Singalang; VII.1878, O. Beccari.

Other material examined: SMF 3645; 7 males;

Indonesia, Sumatra, west coast, Gunung Singgalang, 1800 m; 1925, leg. E. Jacobson. – RMNH.ARA.15939; 1 male, 1 female, several juveniles; Indonesia, East Sumatra, Gunung Leuser N.P., Bohorok, 3°30′0″N, 97°30′0″E, leaf litter, 10.08.1982, leg. C. L. and P. R. Deeleman. – MHNG; 1 male, 1 female; Indonesia, South Kalimantan Province, Pagat, ca 6 km E of Barabai, Gunung Batu Benawa, 2°38′40″S, 115°24′46″E, 110 m, secondary forest on lime stone; 11.- 14.10.2008, leg. P. Schwendinger (sample IND- 08/18).

Remarks on synonymy: Type material of Libania scabricula and L. annulata unambiguously match the type of C. rugosus . The type of Libania scabricula sulcata is lost; however, it is considered similar to L. scabricula based on the original description and thus is here placed in the synonymy of C. rugosus . Some of the examined material is from the type locality of L. annulata , i.e. Sumatra, Singalang (= Gunung Singgalang). All of it unambiguously matches the type of C. rugosus . The synonymization of L. armillata is by Roewer (1954) and is followed here. Furthermore, as Mt Singgalang is very rich in species, all these synonymies should be further assessed when more material from that region becomes available.

Diagnosis: Distinguished from known congeners by the presence of two dorsal trichobothria on the cymbium, distinctive shape of E (filifrom; oval base, tapering to a fine tip; Figs 57, 61 ), C (broadest just above base, partly straight retrolateral margin, hooked tip; Figs 57-58, 61, 64 ) and RTA (inward turn approximately at midpoint, pointed tip; Figs 57-58, 61-64 ). Females can be distinguished by the round CO and S ( Figs 59-60).

Description: Male from Gunung Singgalang (SMF 3645): Total length: 4.3-4.6; prosoma length: 2.1, width: 2.0. Leg I: femur 2.2, patella 0.7, tibia 2.2, metatarsus 1.3, tarsus 0.9. Prosoma uniformly red-brown, eight eyes ( Figs 17-20 ). Opisthosoma dorsally with irregular black, diffused spots, anteriorly with white spots, two pairs of brown circular spots towards the center, laterally black spots connect to form bands ( Figs 17-20 ). Legs uniformly yellow-brown. Leg formula 1243, ALE> PLE> AME> PME (AME 0.5 times ALE). AER and PER recurved, eyes on light brown-colored mounds, mounds of LE not touching. Palps as in Figs 61-64 . Cymbium of male palp with two dorsal trichobothria ( Fig. 64 ).

Female: Total length: 3.0; prosoma length: 1.5, width: 1.4. Leg I: femur 1.2, patella 0.5, tibia 1.2, metatarsus 0.9, tarsus 0.6. In general similar to male. ALE> PLE> AME, PME absent. Epigynum and vulva as in Figs 59- 60.

Distribution: Known from localities on Sumatra and Borneo.

Figures

Figs 17 - 22. Photographs of Cebrenninus spp., dorsal view. (17 - 18) Syntypes of Libania annulata syn. nov. (= C. rugosus) (MCSN, 17 female, 18 male). (19) Female syntype of Libania scabricula syn. nov. (= C. rugosus) (MCSN). (20) Cebrenninus rugosus, male (SMF 3645). (21 - 22) C. kalawitana comb. nov (SMF 3636). Scale lines = 1.0 mm (17 - 18, 20 - 22), 2.0 mm (19).

Figs 61 - 64. Cebrenninus rugosus, left palp. (61 - 62) Male from Indonesia (SMF 3645). (63) Syntype of Libania annulata syn. nov. (MCSN). (64) Male from Indonesia (RMNH. ARA. 15939). (61) Palp, ventral view. (62 - 63) RTA, retrolateral view. (64) Palp, retrolateral view. Scale lines = 0.2 mm.