Tylototriton notialis Stuart, Phimmachak, Sivongxay & Robichaud 2010

Phimmachak, Somphouthone, Aowphol, Anchalee & Stuart, Bryan L., 2015, Morphological and molecular variation in Tylototriton (Caudata: Salamandridae) in Laos, with description of a new species, Zootaxa 4006 (2), pp. 285-310 : 296-297

Tylototriton notialis Stuart, Phimmachak, Sivongxay & Robichaud 2010

Tylototriton asperrimus (part) Yuan, Jiang, Lü, Yang, Nguyen, Nguyen, Jin & Che 2011: 583. Tylototriton notialis Nishikawa, Matsui & Nguyen 2013b: 36 .

Referred material. FMNH 271120 (male paratype), FMNH 271121 (male holotype), FMNH 271125 (one larva), FMNH 271129 (nine larvae), Laos, Khammouan Province, Boualapha District, Nakai-Nam Theun National Protected Area, Nam On River catchment, Phou Ak escarpment, 17º38’39.6”N 105º44’12.3”E, 980 m elev., coll. 26–29 May 2007 by Bryan L. Stuart, Somphouthone Phimmachak and Niane Sivongxay. FMNH 271122 (female paratype), same data as holotype except 17º39’03.4”N 105º44’25.2”E, ca. 1,000 m elev., coll. 22 May 2006 by William G. Robichaud. NUOL 0 0 443 (one topotype female), same data as types except 17.64514ºN 105.73681ºE, 984 m elev., coll. 14 May 2013 by Somphouthone Phimmachak, Bryan L. Stuart, and Jennifer A. Sheridan ( Figs. 4 A–B).

Measurements are summarized in Table 4 .

Distribution and natural history. This is the second report of the species in Laos, but from the same (and only) known locality in Laos. The types were collected day and night in semi-evergreen mixed with pine forest, on a stream bottom or the forest floor (Stuart et al. 2010). The larvae were found at night on the bottom of a 3 m wide stream with slow current, sand and bedrock substrate, and leaf litter-filled potholes (Stuart et al. 2010). The newly reported NUOL topotype was taken at 1115 h after heavy rain under leaf litter and pine needles at the base of a 0.3 m diameter-at-breast-height (DBH) pine tree, 4 m from a stream pool, in semi-evergreen mixed with pine forest.

Elsewhere, the species has been reported from adjacent Pu Hoat, Nghe An Province, Vietnam ( Yuan et al. 2011; Nishikawa et al. 2013b; this study; Fig. 2 ).

Figures

FIGURE 2. Principal component analysis of the genus Tylototriton showing two dimensional plots of the first principal component (PC 1) versus the second (PC 2). (A) males of the subgenus Tylototriton, (B) females of the subgenus Tylotriton, and (C) males of the subgenus Yaotriton.

FIGURE 4. Tylototriton notialis: (A) Dorsal view and (B) ventral view of topotype female (NUOL 00443) at Phou Ak, Nakai Nam Theun National Protected Area, Boualapha District, Khammouan Province, Laos. Tylototriton anguliceps: (C) Dorsal view of female (NUOL 00419), (D) dorsal view of male (NUOL 00420), (E) ventral views of female above (NUOL 00419) and male below (NCSM 82953), (F) dorsal view of eft (NUOL 00448), (G) microhabitat at stream bank, and (H) macrohabitat at Nam Long Stream, Phou Ya Khao Village, Viengphoukha District, Laos, Luang Namtha Province, Laos.