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Ptychozoon bannaense WANG, WANG & LIU, 2016

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos) 
Subspecies 
Common NamesE: Banna Parachute Gecko
Chinese: Banna San Hu 
SynonymPtychozoon bannaense WANG, WANG & LIU 2016 
DistributionChina (Yunnan)

Type locality: Manheke Village (22° 0819" N, 100°8773" E; 680 m elevation, datum = WGS84; see Fig. 1), Mengyang Town, Xishuangbanna Dai Autonomous Prefecture, Yunnan Province, China.  
Reproduction 
TypesHolotype. SYS (Sun Yat-sen University Museum of Biology) r001242, an adult female, collected 31 May 2015 by Jian Wang and Hai-Long He.
Paratype. SYS r001237, an adult male, from the same locality as the holotype, collected 30 May 2015 by Jian Wang. 
CommentDiagnosis. Ptychozoon bannaense sp. nov. can be diagnosed by the combination of the following characters: (1) body size moderate, SVL 83.2 and 87.5 mm for two specimens; (2) rostral with a short dorsomedian groove; (3) dorsum of head and body covered with granular scales without enlarged tubercles, but male with several enlarged tubercles on the occipital region; (4) supranasals separated from each other by a large internasal; (5) predigital notch in preantebrachial cutaneous flap absent; (6) digits of hands and feet strongly webbed; (7) male possesses 17 preanofemoral pores in a continuous row; (8) the tail with 24 pairs of lateral denticulate cutaneous lobes, ending in a small terminal cutaneous flap; (9) width of tail and caudal lobes progressively decreasing posteriorly; (10) lack of lobe fusion at the terminal caudal flap border; (11) tail tubercle absent; (12) four dark dorsal bands between fore- and hind limbs insertions, the third and fourth dorsal bands fused into an X-shaped mark.

Comparisons. Comparative diagnostic character states, necessary for the recognition of P. bannaense sp. nov., as compared to eight recognized species of Ptychozoon (Table 3) were obtained from the literature (Boulenger 1890; Taylor 1963; Brown et al. 1997; Brown 1999; Das & Vijayakumar 2009; Sumontha et al. 2012).
Ptychozoon bannaense sp. nov. is the sister taxon of P. lionotum in our phylogenetic tree, and differs from the latter (in parenthesis) by the terminal tail flap short, TFL 5.1 mm (versus 7.8–21.4 mm), not expanded (versus expanded); terminal tail flap edge straight (versus terminal tail flap edge wavy), lacking lobe fusion (versus extensive fusion of 3–9 denticulate lobes); 15 scales across widest portion of tail terminus (versus 24–31); the absence (versus presence) of a predigital notch in the preantebrachial cutaneous flap; the presence of several tubercles on occipital region in male (versus consistently absent enlarged dorsal tubercles); the third and fourth dorsal bands of body fused into a X-shaped mark (versus not fused).
Ptychozoon bannaense is most similar to P. horsfieldii, P. intermedium and P. kaengkrachanense Sumontha, Pauwels, Kunya, Limlikhitaksorn, Ruksue, Taokratok, Ansermet & Chanhome, 2012 in tail morphology. It differs from P. horsfieldii (in parenthesis) by the body size large, SVL 83.2 and 87.5 mm for two individuals (versus SVL 56.8–73.9 mm); the presence of 17 preanofemoral pores in a continuous row (versus 10–11 pore-bearing precloacal and 8–11 pore-bearing femoral scales in a interrupted series); presence of several tubercles on occipital region in male (versus consistently absent enlarged dorsal tubercles); 24 pairs of denticulate tail lobes (versus 15–16); lack of lobe fusion at the terminal caudal flap border (versus possession of a minimal lobe fusion at its proximal edge). It differs from P. intermedium by the absence of enlarged dorsal tubercles, except occipital region in male (versus consistent presence of dorsal tubercles), the presence of 17 preanofemoral pores in a continuous scale row (versus 8–12 pore-bearing precloacal and 12–19 pore-bearing femoral scales in a interrupted series); lack of lobe fusion at the terminal caudal flap border (versus 2-4 lobes fuse at the anterior border); supranasals separated by an internasal (versus internasal absent, supranasals in contact with each other). It differs from P. kaengkrachanense by supralabials 11–13 (versus 8–10), ventral scales in 37 rows (versus 24–25 rows); supranasals separated by an internasal (versus internasal absent, supranasals in contact with each other); the presence (versus absence) of a short dorsomedian rostral groove; four dark transverse dorsal bands between limbs insertions, the third and fourth fused into a X-shaped mark (versus only three distinct bands).
The new species can be clearly distinguished from the remaining four species in morphology. It differs from P. kuhli by a 5.1 mm long terminal tail flap (versus 21.4–30.3 mm), 15 scales across widest portion of tail terminus (versus 42–51); the terminal tail flap is semicircular in shape, not expanded, and non-denticulate without lobe fusion (versus terminal flap elongated, widely expanded, and with minimal lobe fusion), the absence of enlarged dorsal tubercles, except occipital region in male (versus present 2–6 straight dorsal rows), the absence (presence) of tail tubercles; it differs from P. rhacophorus by the absence of enlarged dorsal tubercles, except occipital region in male (versus present 6–10 dorsal rows), the terminal tail flap present (versus absent), semicircular in shape (versus sharply tapering), SVL 83.2 and 87.5 mm for two individuals (versus 58.8–64.5 mm), supranasals separated by an internasal (versus internasal absent, supranasals in contact with each other), the presence (versus absence) of a short dorsomedian rostral groove; it differs from P. trinotaterra by the terminal tail flap is semicircular in shape, not expanded, and non-denticulate without lobe fusion (versus terminal tail flap widened, at most slightly beyond nearest lobe, and with only a single lobe fusion evident anteriorly), 15 (versus 26) scales across widest portion of tail terminus; the absence of enlarged dorsal tubercles, except occipital region in male (versus the presence of a single midvertebral dorsal tubercle row in a Thai specimen and more numerous differentiated nuchal and temporal region tubercles in a juvenile Vietnamese specimen), SVL 83.2 and 87.5 mm for two individuals (versus 70.5–71.3 mm), the absence (versus presence) of tail tubercles, possession of 17 (versus 19–21) preanofemoral pores, the presence (versus absence) of a short dorsomedian rostral groove; it differs from P. nicobarensis Das & Vijayakumar, 2009 by the absence of enlarged dorsal tubercles, except occipital region in male (versus four irregular dorsal rows), the terminal tail flap is semicircular in shape, not expanded, without lobe fusion (versus terminal tail flap expanded, with “weak” lobe fusion at proximal border), 15 (versus 20–29) scales across widest portion of tail terminus; supranasals separated by an internasal (versus internasal absent, supranasals in contact with each other). 
EtymologyThe specific epithet “bannaense” refers to the type locality, Xishuangbanna, which is usually referred to as “Banna” in Chinese. In the local aboriginal language, the “Xishuang” means “twelve”, the “Banna” means “a small administrative district”. 
References
  • WANG, YING-YONG; JIAN WANG, ZU-YAO LIU 2016. Description of a new species of the genus Ptychozoon (Squamata: Gekkonidae), representing a new national record of this genus from southern Yunnan Province, China. Zootaxa 4084 (3): 406–420
 
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