Megophrys ancrae

Diagnosis. Megophrys ancrae sp. nov. is diagnosable from geographically relevant congeners by the following combination of characters: medium-sized slender species, adult-male SVL 39.1 – 45.0 mm (N = 8), adultfemale SVL 48.9 mm (N = 1); HL> HW, HW / SVL 30.0 – 35.8 % (N = 10); SHL / SVL 46.0 – 55.3 % (N = 10); tympanum clearly defined, TYD / ED 50.0 – 63.2 % (N = 10); vomerine ridges small to medium-sized, weakly raised and circular; distinct dorsolateral folds present; subarticular, palmar and metatarsal tubercles absent; lateral fringes on toes absent; webbing between toes rudimentary; digit tips distinctly expanded terminally; protruding projection posterior to cloaca of males absent; dark spots on the throat present on most specimens; small, sharp, horn-like tubercle present on the eyelids of most individuals. Comparisons. Megophrys ancrae sp. nov. differs from the following large-sized species by considerably smaller adult male size, SVL 39.1 – 45.0 mm, N = 8 (vs. adult male SVL> 53 mm: M. gigantica Liu, Hu & Yang, N = 6; M. glandulosa Fei, Ye & Huang, N = 10; M. jingdongensis Fei & Ye, N = 2; M. lekaguli Stuart, Chuaynkern, Chan-ard & Inger, N = 8; M. major (Boulenger), N = 8; M. medogensis Fei & Ye, N = 16; M. omeimontis Liu, N = 10; M. robusta (Boulenger), N = 4; M. spinata Liu & Hu, N = 2); from the following medium-sized species by smaller adult size, male SVL 39.1 – 45.0 mm, N = 8, female SVL 48.9 mm, N = 1 (vs. M. megacephala Mahony, Sengupta, Kamei & Biju male SVL 45.9 – 53.4 mm, N = 7, female SVL 64.4 mm, N = 1; M. takensis Mahony male SVL 47.3 – 53.0 mm, N = 3, female SVL 72.9 mm, N = 1), further from M. megacephala by considerably narrower head, HW / SVL 30.0 – 35.8 %, N = 10 (vs. HW / SVL 40.2 – 45.1 %, N = 9), and further from M. takensis by vomerine ridges small to medium-sized, weakly raised and circular (vs. elongated stalk-like projections); from the following small-sized species by larger adult size, male SVL 39.1 – 45.0 mm, N = 8, female SVL 48.9 mm, N = 1 (vs. M. daweimontis Rao & Yang male SVL 34 – 37 mm, N = 17, female SVL 40 – 46 mm, N = 3; M. pachyproctus Huang male SVL 35.3 – 36.2 mm, N = 2, female unknown; M. parva male SVL 33.9 – 36.0 mm, N = 2, female SVL 41.1 – 41.4 mm, N = 2; M. wuliangshanensis Ye & Fei male SVL 27.3 – 31.6 mm, N = 10, female SVL 41.0 – 41.5 mm, N = 2; M. zunhebotoensis Mathew & Sen male SVL 30.0 mm, N = 1, female SVL 39.0 mm, N = 1), further from M. daweimontis by HL> HW (vs. HW ≥ HL), palmar and metatarsal tubercles absent in life and in preservation (vs. inner and outer palmar tubercles and inner metatarsal tubercles distinct and red in life), further from M. pachyproctus by protruding projection posterior to cloaca of male absent (vs. present), and further from M. parva by TYD / ED 49.2 – 63.2 %, N = 10 (vs. TYD / ED 40 – 48.9 %, N = 4), shanks considerably longer on males, SHL / SVL 46 – 55.3 %, N = 8 (vs. male SHL / SVL 42.8 – 43.7 %, N = 2); from M. nankiangensis Liu & Hu and M. shapingensis Liu by tympanum clearly defined (vs. tympanum concealed by supratympanic fold); from M. binchuanensis Ye & Fei and M. wushanensis Ye & Fei by subarticular tubercles absent (vs. present), and lateral fringes on toes absent (vs. present); from M. palpebralespinosa Bourret by webbing between toes rudimentary (vs. approx. half digit length); from M. binlingensis Jiang, Fei & Ye and M. minor by lateral fringes on toes absent (vs. present), further from M. binlingensis by vomerine ridges weakly raised and circular (vs. slender and not dilated at its posterior region), and further from M. minor by dark spots on the throat present on most specimens (vs. absent); from M. wawuensis Fei, Jiang & Zheng and M. zhangi Ye & Fei by dorsolateral folds distinct (vs. indistinct), further from M. wawuensis by larger tympanum, TYD / ED 49.2 – 63.2 %, N = 10 (vs. TYD / ED ca. 33 %), and further from M. zhangi by lateral fringes on toes absent (vs. present); from M. serchhipii Mathew & Sen by dorsolateral folds always present, usually 2 / 3 to complete body length (vs. absent).