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Diploderma daduense CAI, LIU, LIANG, HOU, ZHOU, ZHONG, LI & CHANG, 2024

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Higher TaxaAgamidae (Draconinae), Sauria, Iguania, Squamata (lizards)
Subspecies 
Common NamesE: Dadu Mountain Lizard
Chinese: 大渡攀蜥 (dà dù pān xī) 
SynonymDiploderma daduense CAI, LIU, LIANG, HOU, ZHOU, ZHONG, LI & CHANG 2024: 14
Japalura splendida — BARBOUR & DUNN 1919 in part
Diploderma splendidum — WANG et al. 2019 in part 
DistributionChina (Sichuan)

Type locality: Jinkou Gorge (29.2292° N, 103.0568° E; at elevation 634 m a.s.l.), Leshan City, Sichuan Province, China  
Reproduction 
TypesHolotype. CIB 119364 (erroneously given as 119354 but corrected in a subsequent version of the paper), adult male (field number CB2021251), collected by Bo Cai in June 2021.
Allotype. Adult female, YBU-GP9889 (filed number CB2021252), the same collecting information as the holotype.
Paratypes. All these specimens are collected from Sichuan Province, China. Shimian County: one subadult female (CIB-CB 2021253 from Liudaping (29.2629° N, 102.4148° E; at elevation 1181 m a.s.l.) and one subadult female (CIB-CB 2021249), two subadult males (CIB-CB 2021246–47) and one adult female (CIB-CB 2021248) from Hongqi Village (29.2629° N, 102.4148° E; at elevation 877 m a.s.l.) collected by Bo Cai in June 2021; one subadult female (YBU22692) from Zhengjiaping (29.5055° N, 102.1764° E; at elevation 1040 m a.s.l.) and one adult male (YBU 23205) from Longtoushi (29.3391° N, 102.2591° E; at ele- vation 1165 m a.s.l.), one adult male (YBU 23209) from Xiaping Village (29.2401° N, 102.3279° E; at elevation 995 m a.s.l.), four adult males (YBU 23202, YBU 22688, YBU 23210, and YBU23212) from Mafu Village (29.2636° N, 102.4803° E; at elevation 824m a.s.l.) collected by Ling Li and Yayong Wu in June 2022. Jiulong County: two adult males (CIB- 2023SCGZ0301–02) from Wanba Town (29.1375° N, 102.1004° E; at elevation 1687 m a.s.l.) and two adult females (CIB-2023SCGZ0303–04) from Hongba Town (29.238° N, 102.0876° E; at elevation 2063 m a.s.l.) collected by Huangming Zhou and Jing Li in August, 2023. Hanyuan County: two adult females (CIB-CB2021228–29), one adult male (CIB- CB2021230), and one subadult female (CIB-CB2021227) from Sanguzhuang (29.2685° N, 102.8101° E; at elevation 880 m a.s.l.) collected by Bo Cai in June 2021; one adult male (YBU 23204) from Zhaohoumiao (29.3087° N, 102.7964° E; at elevation 1053 m a.s.l.), one adult male (YBU 22711) from Shunhe Township (29.3154° N, 102.7262° E; at elevation 842 m a.s.l.) collected by Ling Li and Yayong Wu in June 2022. Ganluo County: one adult fe- male (YBU 22706) and two adult males (YBU23208 and YBU 23218) from Tianping Village (29.2731° N, 102.921° E; at elevation 857 m a.s.l.) collected by Ling Li and Yayong Wu in June 2022. Jinkouhe District: two adult males (CIB-CB 2021237 and YBU22698), one subadult male (CIB-CB 2021239), and two adult females (CIB-CB 2021238 and CIB- CB 2021240), same information as holotype; four adult males (CIB-201806030–33) and two adult females (CIB 201806026 and CIB 201806035) collected from Jinkou Gorge (29.2195° N, 103.0645° E; at elevation 639 m a.s.l.) by Bo Cai in June 2018. Ebian County: one male (CIB CB2021242), two subadult males (CIB-CB2021241 and CIB-CB2021243) from Beifeng Mt. (29.2414° N, 103.261° E; at elevation 587 m a.s.l.) collected by Bo Cai in June 2021. Emeishan City: two subadult females (CIB-CB2021244–45) from Kuhaoping (29.4318° N, 103.2906° E; at elevation 1137 m a.s.l.) collected by Bo Cai in June 2021. 
DiagnosisDiagnosis. Diploderma daduense sp. nov. can be diagnosed from other Diploderma spe- cies by the following unique combination of characters: (1) body size large, SVL 74.7–95.0 (average 86.5) mm in adult males, 52.6–80.2 (average 70.5) mm in adult females; (2) head relatively larger, HW/HL 0.61–0.79 (average 0.80) in adult males, 0.60–0.67 (average 0.64) in adult females; (3) finger IV subdigital lamellae 17–23 (average 19.2), toe IV subdigital lamellae 21–31 (average 25.3); (4) tympanum concealed; (5) head mainly green-yellow, supplemented by black; (6) skin folds under nuchal and dorsal crest obviously present in adult males only, vertebral crest discontinuous between nuchal and dorsal sections with a distinct gap; (7) transverse gular fold present but not obvious in some individuals; (8) ventral scales of body homogeneous in size and strongly keeled; (9) gular spot absent in both sexes; (10) dorsolateral stripes green-yellow anteriorly, cyan in center and blurry off- white posteriorly (248, 240, 227) in adult males, upper edge of dorsolateral stripes strongly jagged in adult males; (11) no radial stripes around eyes; (12) inner-lip coloration smoky- white, and coloration of tongue and oral cavity light-flesh color in life; (13) ventrolateral body coloration smoky-white, dim-gray, or rust-red (214, 107, 79); (14) bright green-yel- low transverse stripes on dorsal body in males; (15) black patches are evenly distributed along the vertebral line between the dorsolateral stripes from the neck to the base of the tail in males; (16) beech-brown (87, 65, 40) or gray-brown (127, 112, 83) line along the ver- tebral line with heart-shaped or diamond-shaped black patches on dorsal body in females; and (17) supratemporals fewer than four on at least one side.
Description of Holotype. Adult male, body large-sized, SVL 93.5 mm; tail long, TAL 245.2 mm; head longer (30.0 mm) than wide (22.6 mm); head depth 15.1 mm; length of tallest nuchal crest 2.5 mm; snout–eye length 11.1 mm; foreleg length 42.4 mm; hindleg length 72.0 mm; toe IV length 18.3 mm; trunk length 49.0 mm; snout moderately long, SEL/HL 0.37. Rostral flat, bordered by 5 small postrostral scales; dorsal head scales heter- ogeneous in size, most of them keeled. Number of scales between eyes 17; nasal scale ap- proximately oval; internasals 7; loreals 6/6, small, unkeeled; supralabials 8/8, infralabial scales 8/9, supratemporals 4/3, and middorsal crest scales 45, keeled; gular scales 33 and ventral scales 64; finger IV subdigital lamellae 21/23; toe IV subdigital lamellae 29/31; na- sal–supralabial scale rows 1/1; suborbital scale rows 2/2. Below subocular, there are 3 par- allel rows of scales, and first row extends from front of anterior nasal to upper post-rictus, second row extends from postrostrals to upper post-rictus, and third row is supralabials; transverse gular fold present; gular pouch present in life; tympanum concealed, covered with small keeled scales; well-developed skin fold under nuchal crest present, vertebral crest discontinuous between nuchal and dorsal sections with gap; dorsal and ventral scales distinctively keeled exclude scales around eyes and lips; dorsal scales of head, trunk, limbs, and tail heterogeneous in size, ventral scales of head homogeneous in size with few larger scales, ventral scales of trunk homogeneous in size; fold present in front of shoulder; fourth toe with claw reaching between tympanum and eye when hindlimbs adpressed forward. Upper edges of dorsolateral stripes are strongly jagged, but lower edge is relatively smooth.
Coloration of Holotype in life (Figures 5C,D and 6). The dorsal head is mainly green- yellow, with two black transverse stripes connecting the left and right supraoculars, black spots on the frontal, and black and green-yellow markings on the anterodorsal edge. The green-yellow ground color of the head is maculated with black. There are four stripes around the upper eye except the subocular regions on each side, with a thick black stripe extending from the posterior nasal through the lower palpebrals to the temporal region. The first subocular scale row is white in the middle and green-yellow at both ends, second row black. The supralabials and infralabials are white, turning gray-brown when stressed. Below are infralabials with beech-brown lines. Gular spot is absent. The ventral scales of the head are white with gray-brown lines, turning gray-brown with beech-brown lines and scattered with white spots when stressed. The inner-lip coloration is smoky-white, and the coloration of the tongue and oral cavity is a light-flesh color.


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Comment 
EtymologyThe Latin specific epithet daduense is derived from the Dadu River, where the new species was discovered. The genus Diploderma is Greek neuter, and that -ense of this new species name is the Latin neuter combinatorial suffix denoting “pertaining to” or “originating in”. 
References
  • Cai, B.; Liu, F.; Liang, D.; Hou, M.; Zhou, H.; Zhong, J.; Li, J.; Chang, J. 2024. A New Species of Diploderma (Squamata, Agamidae) from the Valley of Dadu River in Sichuan Province, with a Redescription of Topotypes of D. splendidum from Hubei Province, China. Animals 14: 1344 - get paper here
  • Liu, S.; Hou, M.; Rao, D. 2024. A New Species of Diploderma Hallowell, 1861 (Reptilia, Squamata, Agamidae) from Northeastern Yunnan Province, China. Taxonomy 2024, 4, 412–431 - get paper here
 
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