Lobonychium palpiplus Rediscovery of Lobonychiumpalpiplus Roewer, 1938 (Opiliones, Laniatores, Epedanidae) in Sabah, Malaysia Zhang, Chao Martens, Jochen ZooKeys 2018 785 29 40 7X264 Roewer, 1938 Roewer 1938 Arachnida Epedanidae Lobonychium CoL Animalia Lobonychium palpiplus Opiliones 0 29 Arthropoda species palpiplus   Lobonychium palpiplusRoewer, 1938: 125, fig. 44.  Type specimens. Male lectotype (SMF-5376-1201), here designated, labeled: " Lobonychium palpiplus, male lectotype (SMF-5376-1201), designated by Chao Zhang [handwritten]". All types (lectotype and two paralectotypes) from Pontianak [ 00°01'S, 109°20'E], Borneo (West Kalimantan, Indonesia), deposited in the Senckenberg Museum Frankfurt, Germany, labeled: "Arachn. Coll. Roewer - Lfd. No. 5376, Opil: EpedaninaeNo. 16, Lobonychium palpiplusRwr [abbreviation for Roewer], 2♂1♀, Borneo: Pontianak, Typus, Roewer det. 1935" (Fig. 35) (examined). Additional material examined. 1♂ (MHBU-Opi-20151208m) and 2♀, (MHBU-Opi-20151208f, MHBU-Opi-2015120801f), Malaysia: Sabah, Trus Madi Mountain, about 1103 m alt. 05°25.637'N, 116°25.984'E, October 9, 2015, Z. Z. Gao leg.; 1♀, Malaysia: Sabah, Trus Madi Mountain, about 1081 m alt. 05°26.111'N, 116°27.237' E, October 10, 2015, Z. Z. Gao leg.; 1♀, Malaysia: Sabah, Trus Madi Mountain, about 760 m alt. 05°27.598'N, 116°26.936'E, October 12, 2015, Z. Z. Gao leg.; 1♀, Malaysia: Sabah, Kalabakan, about 330 m alt. 04°32.522'N, 117°10.020'E, October 18, 2015, Z. Z. Gao leg.; 2♀, Malaysia: Sabah, Trus Madi Mountain, about 1121 m alt. 0 5°26.529'N, 116°27.309'E, May 1, 2017, C. Jin leg.; 1♂1♀, Malaysia: Sabah, Trus Madi Mountain, about 1081 m alt. 05°26.111'N, 116°27.237'E, May 3, 2017, C. Jin leg.  Redescription. Male (MHBU-Opi-20151208m) habitus as in Figs 1, 8-9, 31. Coloration (Fig. 31): entire body rusty yellow, with somewhat dark brown to blackish brown patches on dorsum; median area of carapace with dark brown reticulations; both lateral ridges of scutum with blackish brown stripes; opisthosomal region of scutum banded with a dark brown outline; a dark brown band across posterior margin of scutum; free tergites I-IIIeach with a dark brown band; coxa with dark brown reticulations; free sternites with transverse dark brown band; chelicerae and pedipalp reticulated; trochanters of all legs pale yellow, femur, patella, tibia and metatarsus with black reticulations, tarsus lighter.  Figures 1-7. Lobonychium palpiplusRoewer, 1938, male (MHBU-Opi-20151208m) (1-6), female (MHBU-Opi-20151208f) (7) 1 Body, lateral view 2 Left chelicera, medial view 3 Same, ectal view 4 Cheliceral fingers, frontal view 5 Basal segment of left chelicera, dorsal view 6 Left pedipalp, medial view 7 Right pedipalp, medial view. Scale bars: 1mm (1, 6-7); 0.5 mm (2-3, 5); 0.25 mm (4). Dorsum (Figs 8, 31). Scutum elongate in appearance, both sides straight, nearly parallel, widest portion of body at scutal area IV, abdomen bluntly pointed posteriorly. Carapace unarmed on lateral portion of anterior margin. Surface of dorsum smooth. Ocularium low and oval, unarmed, removed from anterior border of scutum by 0.16 mm. Borders of opisthosomal scutum parallel to each other. Free tergites and anal operculum unarmed.  Figures 8-22. Lobonychium palpiplusRoewer, 1938, male (MHBU-Opi-20151208m) (8-16), female (MHBU-Opi-20151208f) (17-22) 8 Body, dorsal view 9 Same, ventral view 10 Right tarsus I, retrolateral view 11 Distal segment of right tarsus III, retrolateral view 12-15 Patellae and tibiae of left legs, prolateral view 12 Leg I 13 Leg II 14 Leg III 15 Leg IV 16 Basal segment of right chelicera, dorsal view 17 Body, dorsal view 18 Right chelicera, ectal view 19 Cheliceral fingers, frontal view 20 Basal segment of left chelicera, ectal view 21 Patella and tibia of left leg II, prolateral view 22 Ovipositor, ventral view. Scale bars: 1 mm (8-9, 12-15, 17, 21); 0.5 mm (10, 16, 18, 20); 0.25 mm (11, 19, 22). Venter (Fig. 9). Surface of coxa I tuberculated, antero-dorsally with a coarse tubercle, and a row of five tubercles on ventral surface. Coxa II with a row of small granules on ventral surface. Coxae III and IV nearly smooth aside from a row of small teeth on front and rear margins of coxa III. Genital operculum and free sternites with seta-tipped granules. Spiracles clearly visible. Chelicerae (Figs 2-5, 16). Basichelicerite elongate, with a slight bulla and armed with two conspicuous granules at base of bulla, medial surface with a basal protuberance (Figs 2, 3, 5). Cheliceral hand with some greater seta-tipped tubercles. Fingers relatively short, inner edges toothed (Fig. 4): moveable finger and fixed finger with eight crested teeth, respectively. Pedipalpi (Fig. 6). Coxa dorsally with one small tubercle near distal margin. Trochanter ventrally with one setiferous tubercle and dorsally with one small tubercle. Femur ventrally with a row of seven setiferous tubercles of even size and spirally arranged from base to distal end on medial side; dorsally with many low conical tubercles along entire length. Patella ventro-mesally with two long and one short setiferous tubercles, and ventro-ectally with one long and one short setiferous tubercles. Tibia ventro-mesally with three setiferous tubercles, and ventro-ectally with four setiferous tubercles. Tarsus with three setiferous tubercles on each side of ventral surface. Tarsal claw curved, approximately same length as tarsus. Legs (Figs 10-15). Slender and long. All segments unarmed, nearly smooth. Femora I-IVnot curved, almost straight. Tibia II distended at distal portion, conspicuously longer than tibiae I, III and IV (Figs 12-15). Distitarsus I with two (Fig. 10), distitarsus II with three tarsomeres. Distitarsi III-IVwithout scopula. Each claw of tarsi III-IVwith one basal lobe nearly circular in shape (Fig. 11). Tarsal formula ( I-IV): 7/19/7/7. Penis (Figs 23-30). Shaft slender, nearly parallel-sided, then distended towards apical portion (pars distalis). Ventral plate inflated, hollow on inner side, forming a heart-shaped stereoscopic ventral frame (ventral view, Fig. 28) (Figs 27, 30). Glans partially sunken into dorsal depressed portion of pars distalis (Fig. 26). Prior to inflation of capsula externa (follis) (Fig. 30), stylus with capsula interna sunken into capsula externa (Fig. 27). Capsula externa dorsally and ventrally extended at distal end. Everted capsula interna with a bifurcate ventral lobe distally. Stylus finger-shaped. Spination symmetrical. One pair of setae A, C, D, and E. Two pairs of setae F. Four pairs of setae B (Figs 28-30).  Figures 23-30. Lobonychium palpiplusRoewer, 1938 (MHBU-Opi-20151208m) 23 Penis, ventral view 24 Same, dorsal view 25 Same, lateral view 26 Distal part of penis, lateral view 27 cross-section through glans and truncus at the marked point 28 Distal part of penis (expanded), ventral view 29 Same, dorsal view 30 Same, lateral view. Abbreviations: CE capsula externa (follis) CI capsula interna G glans S stylus VF ventral frame. Scale bars: 0.25 mm. Female (MHBU-Opi-20151208f) (Figs 7, 17-22, 32-34). Generally similar to male except abdomen slightly wider than in male (Figs 17, 32). Tibia II conspicuously longer than tibiae I, III and IV, but inconspicuously distended distally (Fig. 21). Inner edges of finger of chelicera toothed (Fig. 19): moveable finger with 12 teeth; fixed finger with seven teeth. Tarsal formula ( I-IV): 7/22/7/7.  Figures 31-34. Lobonychium palpiplusRoewer, 1938 Photographs of male (MHBU-Opi-20151208m) and female (MHBU-Opi-20151208f) 31 Male body and parts of appendages, dorsal view 32 Female body and parts of appendages, dorsal view 33 Same, lateral view 34 Same, ventral view. Scale bars: 1 mm (Fig. 33); 0.5 mm (Figs 31-32, 34). Ovipositor (Fig. 22). Ventral surface with four setae and dorsal surface with six setae.  Measurements. Male (female): body 1.89 (2.74) long, 1.36 (1.64) wide at widest portion, scutum 1.69 (1.76) long. Ocularium 0.19 (0.20) long, 0.37 (0.35) wide. Proximal article of chelicera 0.69 (0.62) long, 0.24 (0.23) wide; second 0.89 (0.98) long, 0.26 (0.26) wide; distal 0.40 (0.44) long, 0.09 (0.08) wide. Pedipalp claw 0.64 (0.63) long. Penis 0.88 long. Measurements of pedipalp and legs as in Tables 1, 2.  Table 1. Pedipalp and leg measurements (mm) of Lobonychium palpiplusRoewer, 1938, male, length/width.    Trochanter Femur Patella Tibia Metatarsus Tarsus Total  Table 2. Pedipalp and leg measurements (mm) of Lobonychium palpiplusRoewer, 1938, female, length/width.    Trochanter Femur Patella Tibia Metatarsus Tarsus Total  Habitat. The specimens were collected by leaf litter sieving in dark moist places under dense forest canopy.  Variation. The collection examined contains ten specimens, two males and eight females. The male (MHBU-Opi-20151208m) and the female (MHBU-Opi-20151208f) described here are asymmetrical in the position of granules on the left (Figs 5, 20) and right (Figs 16, 18) basichelicerites of chelicerae. Another male body 1.96 long, 1.21 wide at the widest portion, scutum 1.68 long. Size range of other females (n=7) as follows minimum (maximum in parentheses): body 2.20 (2.70) long, 1.59 (1.76) wide at the widest portion, scutum 1.72 (1.89) long. The variations in the number of segments in the tarsus are shown in Table 3.  Table 3. Numbers of tarsomeres of on legs of Lobonychium palpiplusRoewer, 1938. L left, R right tarsus. Only one number is given when the specimen is symmetrical.    Specimen number (n=10) Sex Leg I Leg II Leg III Leg IV  Distribution. Indonesia (Pontianak), Malaysia (Trus Madi Mountain, Kalabakan).  Remarks. The three type specimens have not been dissected and are in good condition, with all appendages attached. The original description of the types by Roewer (1938)corresponds more-or-less to the morphology of the type specimens except for few minor characters, e.g., the male tibia II is distended at its distal portion, the presence of one short setiferous tubercle ventro-mesally on the pedipalpal patella, the minimum numbers of the tarsomeres II and III are 18 and 6, respectively, and the smaller male body (1.89-1.96). Additionally, the localities of the new records from Malaysia are at most about 120 km apart. The distance between the recorded type locality (Indonesian part of Borneo) and the new localities (Malaysian part) is nearly 1000 km (Fig. 36).  Figure 35. Original label with Roewer'shandwriting of the type series of Lobonychium palpiplusRoewer, 1938.  Figure 36. Distribution of Lobonychium palpiplusRoewer, 1938 in Borneo. A type locality B Trus Madi Mountain C Kalabakan. According to the drawings presented by Suzuki (1969: 30, fig. 19 E; 1977: 19, fig. 6 F-G; 1981: 268, fig. 1 B-C) the male genital morphology of Epedanidaeseems to be quite homogeneous and little functional variation has been documented to date.