Atractides (Atractides) siamis, Pesic, Vladimir & Smit, Harry, 2009
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publication ID |
https://doi.org/ 10.5281/zenodo.190536 |
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DOI |
https://doi.org/10.5281/zenodo.6216144 |
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persistent identifier |
https://treatment.plazi.org/id/03DD801A-E554-FFA5-FF43-D77CFDD0FC6C |
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treatment provided by |
Plazi |
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scientific name |
Atractides (Atractides) siamis |
| status |
sp. nov. |
Atractides (Atractides) siamis sp. nov.
( Figs. 1A–D View FIGURE 1 A – D , 2A–D View FIGURE 2 A – D )
Type material. Holotype: male dissected and slide mounted in Hoyer's fluid. MALAYSIA, Jerian stream, Fraser’s Hill, 14.ii.2009, 3° 43.479 N 101° 42.935 E, alt. 1011 m, leg. Smit. Paratypes: 1/1/0, same data as holotype; 0/4/0 (0/1/0 mounted), Malaysia, unnamed creek crossing Road 55 to Kuala Kubu Bharu, 8.ii.2009 3° 40.511N 101° 44.511 E, alt. 823 m, leg. Smit.
Further material. MALAYSIA: river Gumut at crossing with road 55, 18.ii.2009, 3° 37.155 N 101° 44.558 E, leg. Smit 1/0/0; stream crossing road to Ringlet, Cameron Highlands, 18.ii.2009, 4° 22.212 N 101° 21.522 E, alt. 1011 m, leg. Smit, 0/2/0; tributary of Tahan River near Lata Berkoh, Taman Negara NP, 9.ii.2009, 4° 26.635 N 102° 23.057 E, alt. 82 m, leg. Smit, 0/1/1. THAILAND: River at km. 13, alt. 465 m, Doi Inthanon NP, 25.xi.2007, 18° 31.532 N 98° 39.091 E, leg. Smit, 1/0/0 (1/0/0 mounted).
Diagnosis. Integument dorsally striated; unsclerotized dorsal muscle attachments; weak sexual dimorphism of P-2, sword seta of P-4 proximally from the proximoventral hair; I-Leg-5 elongated with a rather homoimorphic S-1 and S-2 with a short setal interspace; I-Leg-6 rather short, curved and distally tapering.
Description. General features. Integument dorsally striated. Muscle attachment plates unsclerotized. Genital field: Ac in triangular arrangement; excretory pore smooth; Vgl-1 separated from Vgl-2. Palp: P-2 ventral margin straight, P-4 maximum H near the proximal hair insertion, proximoventral hair near a pointed denticle, sword seta of P-4 proximally from the proximoventral hair. I-Leg: I-Leg-5 elongated, with dorsal and ventral margins only weakly diverging distally, short setal interspace of S-1 and S-2, and these setae similar in dimensions, stocky, bluntly pointed, S-2 thicker than S-1; I-Leg-6 short, curved, basally thickened, distally tapering.
Male (holotype; in parentheses specimen from River at km. 13, Thailand). Idiosoma L/W 297-303 (353)/ 219-234 (253). Coxal field ( Fig. 1A View FIGURE 1 A – D ): L 192 (208), Cx-3 W 220 (238), Cx-1+2 mL 88 (81), Cx-1+2 lL 139 (138). Palp ( Figs. 1 View FIGURE 1 A – D B-C): total L 164 (172), dL: P-1 18 (18), P-2 35 (39), P-3 40 (43), P-4 49 (50), P-5 22 (22); %L: P-1 11.0 (10.5), P-2 21.3 (22.7), P-3 24.4 (25.0), P-4 30.0 (29.1), P-5 13.4 (12.8); L P-2/P-4 0.72 (0.78).
Genital field ( Fig. 1A View FIGURE 1 A – D ): anterior margin convex, posterior margin deeply indented, L/W 61 (70)/ 65 (71), L Ac-1-3: 21 (21)-22 (23)-25 (30).
I-Leg ( Fig. 1D View FIGURE 1 A – D ): I-Leg-5 dL 89 (89), vL 73 (76), dL/vL 1.22 (1.18), HB 28 (29), dL/HB 3.18 (3.1), S-1 L 41 (41), L/ W 13.7 (8.9), S-2 L 42 (44), L/ W 6.2 (6.3), distance of sword setae at I-Leg-5 3 (2), L S-1/2 0.97 (0.93); I-Leg-6 L 52 (55), HB 12 (12), L/HB 4.3 (4.5); L I-Leg-5/6 1.73 (1.64).
Female (from unnamed creek crossing Road 55 to Kuala Kubu Bharu, Malaysia). Idiosoma L/W 444/325. Coxal field ( Fig. 2A View FIGURE 2 A – D ): L 225, Cx-3 W 281, Cx-1+2 mL 91, Cx-1+2 lL 153. Palp ( Fig. 2D View FIGURE 2 A – D ): total L 199, dL and %L (in parentheses): P-1 21 (10.6), P-2 43 (21.6), P-3 53 (26.6), P-4 58 (29.2), P-5 24 (12.1); L P-2/P-4 0.74. Genital field ( Fig. 2B View FIGURE 2 A – D ): L/W 127/102, genital plate L 67, L Ac-1-3: 22-21-22.
I-Leg ( Fig. 2C View FIGURE 2 A – D ): I-Leg-5 dL 110, vL 92, dL/vL 1.2, HB 31, dL/HB 3.6, S-1 L 47, L/ W 10.2, S-2 L 50, L/ W 5.5, distance of sword setae at I-Leg-5 4, L S-1/2 0.94; I-Leg-6 L 59, HB 13, L/HB 4.5; L I-Leg-5/6 1.86.
Remarks. The new species can easily be distinguished from the other Indo-Malayan members of the genus Atractides in the combination of a striated integument, unsclerotized dorsal muscle attachment plates, a weak sexual dimorphism of P-2, sword seta of P-4 proximally from the proximoventral hair, elongated I-Leg- 5 with a rather homoimorphic S-1 and -2 and a narrow setal interspace, and a rather short, curved and distally tapering I-Leg-6.
Within the Palaearctic fauna, due to the striated integument, unsclerotized dorsal muscle attachments plates, a rather short, curved and distally tapering I-Leg-6, unfused Vgl-1 and -2, a smooth excretory pore and a palp with weak sexual dimorphism, Atractides siamis sp. nov. is most similar to A. vaginalis ( Koenike, 1905) , a crenobiontic species known from the Alps and Tatras ( Gerecke 2003), from which it can be easily distinguished in a sword seta of P-4 situated proximally from the proximoventral hair (near distoventral hair in A. vaginalis ).
Etymology. The species is named after Siam.
Distribution. Malaysia, Thailand.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.