Trachylepis gonwouoi Allen, Tapondjou, Welton & Bauer

Allen, Kaitlin E., Tapondjou, Walter P., Welton, Luke J. & Bauer, Aaron M., 2017, A new species of Trachylepis (Squamata: Scincidae) from Central Africa and a key to the Trachylepis of West and Central Africa, Zootaxa 4268 (2), pp. 255-269: 258-261

publication ID

https://doi.org/10.11646/zootaxa.4268.2.5

publication LSID

lsid:zoobank.org:pub:9E3F1E5C-A2A8-4D9E-A1BB-7714E0A90812

persistent identifier

http://treatment.plazi.org/id/0385927B-365F-A765-FF71-FB01FEF22FF5

treatment provided by

Plazi

scientific name

Trachylepis gonwouoi Allen, Tapondjou, Welton & Bauer
status

sp. nov.

Trachylepis gonwouoi Allen, Tapondjou, Welton & Bauer  sp. nov.

Holotype. California Academy of Sciences , San Francisco, CA: CASAbout CAS 261092View Materials, adult male, collected near the town of Mudeka near Mt  . Cameroon, Southwest Region  , Cameroon, 4.125°N, 9.491°E, 16 June 2014, by Kaitlin Allen, Walter Tapondjou and Luke Welton ( Fig. 2View FIGURE 2).GoogleMaps 

Paratypes. Monte L. Bean Life Science Museum, Provo, Utah and California Academy of Sciences, San Francisco, CA: CASAbout CAS 261090View Materials, juvenile, town of Buea near Mt. Cameroon, Southwest Region, Cameroon, 4.160°N, 9.228°EGoogleMaps  ; CASAbout CAS 261091View Materials, female and BYUAbout BYU 573522View Materials, female, town of Idenau , Southwest Region, Cameroon 4.183°N, 9.000°EGoogleMaps  ; CAS 261093, juvenile, BYU 573527, juvenile, BYU 573861, juvenile, BYUAbout BYU 573529View Materials, female, and BYUAbout BYU 573530View Materials, male, town of Nyasoso on Mt. Kupe, Southwest Region, Cameroon, 4.823°N, 9.670°E; 14 June 2016GoogleMaps  – 2 July 2016; coll. Kaitlin Allen, Walter Tapondjou and Luke Welton. ( Fig. 3View FIGURE 3 and Fig. 4View FIGURE 4)

Other material referred. Additional specimens referable to the new species based on mitochondrial genotype are: United States National Museum of Natural History ( USNMAbout USNM) 584340, town of Impongui, Likouala Province, Republic of the Congo, 1.079°N, 17.036°EGoogleMaps  ; Zoologisches Forschungsmuseum Alexander Koenig , Bonn ( ZFMKAbout ZFMK) 68962 and 75386, Mt. Nlonako, Littoral Region, Cameroon, 4.906°N, 9.951°EGoogleMaps  ; and ZFMKAbout ZFMK 87654View Materials, Campo Reserve , South Province, Cameroon, 2.337°N, 9.857°EGoogleMaps  ; Museum für Naturkunde [no voucher collected], Mt. Nlonako, Littoral Region, Cameroon, 4.906°N, 9.951°EGoogleMaps  ; and [no voucher collected], Rumpi Hills , Southwest Region, Cameroon, 4.898°N, 9.119°E ( Fig. 4View FIGURE 4).GoogleMaps 

Diagnosis. Trachylepis gonwouoi  sp. nov. can be distinguished from other Trachylepis  in West and Central Africa by the following characteristics, number of keels on dorsal scales (3–5); moderate SVL (maximum size of 80 mm); number of scale rows at midbody (28–34); number of supracilliaries (6–10); presence of a well defined lateral white stripe extending from beneath eye to insertion of hind limb, bordered by black; and ventral color in life bright blue-green.

Description of the holotype. Adult male specimen; tail regenerated; right parietal scale missing, replaced by scar tissue; some damage to scales on right side of neck; SVL 71 mm; regenerated tail length 101 mm, approximately 1.4 times SVL; head depth 7.6 mm; orbit width 5.7 mm; eye height 3.4 mm; distance from anterior portion of tympanum to tip of snout 16 mm; distance from rictus to tip of snout 13.1 mm; supralabials 7 (L) 8 (R), fifth supralabial located under eye, widened; infralabials 8 (L) 9 (R); 4 supraoculars; supracilliaries 7 (L) 6 (R); 2 supranasals; 2 loreals, anterior roughly half the size of posterior; prefrontals contact at a medial point; supranasals narrowly separated by rostral and frontonasal; nostril bisects nasal scale into postnasal and prenasal; nuchal scales in broad contact; frontoparietals divided by interparietal plate; frontoparietals of equal length; parietals in broad contact; tympanic aperture large and vertically elongated with two well-developed anterior lobules on each side ( Fig. 5View FIGURE 5); right forelimb length 26 mm; right hind-limb length 34.2 mm (measured to the terminus of the longest digit); axilla–groin distance 37.1 mm; limb scales keeled; digits I and IV entirely missing on left hand; subdigital lamellae Toe IV 15 (L) 18 (R); subdigital lamellae Finger IV 10 (R); scales on ventral surface of manus and pes smooth; 30 transverse scale rows at midbody; dorsal scales with 3–5 keels; 49 paravertebral scales between nuchals and base of tail; 54 ventral scales between the first pair of postmentals and cloaca; 6 precloacal scales smooth, medioventrally widened; caudal scales medio-ventrally widened, smooth; regenerated caudal scales large, carination less distinct.

Coloration (preserved specimen): body dorsum uniformly brown with a lateral white stripe from under the eye to the insertion of the hind limb. White stripe 1 mm (one scale row) wide at midbody, widening to 1.5 mm (1.5 scale rows) near forearm insertion, bordered by thin black stripes, about 0.5 mm thick. Ventrally uniform gray-blue from snout to tail tip, limbs ventrally darker gray-blue, ventral surface of manus and pes black ( Fig. 2View FIGURE 2).

Color in life: Dorsal surface solid brown with no mottling; flanks red-brown to middle of flank; white lateral line (1 to 1.5 mm thick) bordered by two thinner black lines (0.5 mm thick) on flank from snout to insertion of hind limb; ventral quarter of flank and venter from tip of snout to tip of tail blue-green; ventral surface of manus and pes black; eyelid borders yellow and contrasting with surrounding brown scales; eyelids black; eye color dark brown; limbs red-brown; feet darker brown than legs or dorsum ( Fig. 6View FIGURE 6).

Variation. Variation among members of the type series of Trachylepis gonwouoi  sp. nov. in mensural and meristic characters are reported in Table 2. The range of variation for each character is reported here: SVL of adults, 71–80 mm; ratio of tail length to body length (for original tails only), 1.787–1.90; ratio of head length to body length, 0.158–0.275; number of scale rows at midbody, 28–34; number of paravertebral scales from nuchals to base of tail, 47–53; number of ventrals from first post-mental pair to the anal plates, 51–61; number of subdigital lamellae for Toe IV, 10–19; number of subdigital lamellae for Finger IV, 9–16; number of supralabials, 6–8; maximum number of keels on dorsal scales, 3–5; supranasials contact at a point or have no contact; prefrontals contact at a point or have no contact; number of supracilliaries, 6–10.

Etymology. This species is a patronym honoring Dr. LeGrand Gonwouo Nono, the first native-born Cameroonian herpetologist, in recognition of his work to increase the knowledge of herpetology and conservation of endangered reptiles and amphibians throughout Cameroon.

Vernacular name. Gonwouo’s skink (English); Scinque de Gonwouo (French).

Distribution. We collected Trachylepis gonwouoi  sp. nov. from two areas in the Southwest Province of Cameroon, on Mt. Cameroon, near the towns of Buea (4.160°N, 9.228°E), Idenau (4.183°N, 9.000°E) and Mudeka (4.125°N 9.491°E) and on Mt. Kupe near the town of Nyasoso (4.823°N, 9.670°E). Specimens from the United States National Museum of Natural History ( USNMAbout USNM) and the Natural History Museum of Geneva ( MHNGAbout MHNG) were collected from Mt. Nlonako (4.905°N, 9.951°E), Campo (2.337°N, 9.857°E), and Rumpi Hills (4.898°N, 9.119°E). One specimen has also been collected in the Likouala province of the Congo near the town of Impongui (1.079°N, 17.306°E). The total distance between the two most distant localities is 1008 kilometers ( Fig. 4View FIGURE 4).

Natural history. Trachylepis gonwouoi  sp. nov. was associated with disturbed habitat in agricultural and residential areas as well as secondary forest. It was often found in the leaf litter or on the trunks of cocoa trees. Specimens from Cameroon were found at elevations from 50 to 1050m. This species is syntopic with T. affinis  and T. maculilabris  .

CAS

California Academy of Sciences

BYU

Monte L. Bean Life Science Museum

USNM

Smithsonian Institution, National Museum of Natural History

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

MHNG

Museum d'Histoire Naturelle

Kingdom

Animalia

Phylum

Chordata

Class

Reptilia

Order

Squamata

Family

Scincidae

Genus

Trachylepis