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Pristurus guichardi ARNOLD, 1986

IUCN Red List - Pristurus guichardi - Least Concern, LC

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Higher TaxaSphaerodactylidae, Gekkota, Sauria, Squamata (lizards: geckos)
Subspecies 
Common NamesE: Guichard's Rock Gecko 
SynonymPristurus guichardi ARNOLD 1986
Pristurus guichardi — KLUGE 1993
Pristurus guichardi — RÖSLER 2000: 106
Pristurus guichardi — RAZZETTI et al. 2011 
DistributionSocotra Island (endemic)

Type locality: Haggier, Socotra Island (12° 32’ N, 54° 02’E).  
Reproductionoviparous 
TypesHolotype: BMNH 1953.1. 7.82 (male);
Paratypes (2): 5, Jena-agahan, BMNH 99.12.5.21/1946.8.20.7, W. R. O. Grant and H. O. Forbes,
1.1899 (one of the paratypes of P. socotranus Parker, 1938); female. 
DiagnosisDiagnosis: A moderately small species of Pristurus sharing the following features with most or all P. socotranus: fairly slender build; frontal bone with lateral down-growths meeting and fusing on the midline and a well-developed, ventrally directed process extending onto each nasal capsule; palatal section . of premaxilla with a W -shaped hind margin, nasal process of premaxilla quite short, not reaching level of anterior margins of orbits; clear contact between palatal sections of maxillae behind premaxilla; 24 or 23 presacral vertebrae with the lateral sections of the anterior zygapophyses only folded slightly over the posterior zygopophyses of the adjoining vertebra; 3 sternal and 2 or 3 xiphisternal ribs; nostril situated between the rostral, a supranasal and two superposed postnasal scales; subtibial scales strongly enlarged, tail compressed in males, with a dorsal crest. Differs from P. socotranus in its flatter snout, absence of enlarged scales on the dorsal edge of the palpebral fold, which is not strongly developed, finer scaling on the body (127-172 scales around midbody compared with 113-124 in P. socotranus), very weak dorsal tail crest made up of two rows of scales in males and no ventral crest, and in colouring (predominantly greyish not brownish, without simple light dorsal stripes, with dark transverse markings on head and neck). P. guicbardi is probably also smaller than P. socotranus (largest specimen 34 mm from snout to vent compared with 39 mm) [ARNOLD 1986]. 
Comment 
EtymologyNamed after Kenneth M. Guichard who collected one of the paratypes (in 1967) and much other important herpetological material in Socotra, Arabia and North Africa. 
References
  • Arnold E N 1986. New species of semaphore gecko (Pristurus: Gekkonidae) from Arabia and Socotra. Fauna of Saudi Arabia 8: 352-377
  • Arnold, E.N. 2009. Relationships, evolution and biogeography of Semaphore geckos, Pristurus (Squamata, Sphaerodactylidae) based on morphology. Zootaxa 2060: 1-21 - get paper here
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Fasola, M., Razzetti, E., Sindaco, R. et al. 2020. Ecological preferences of the endemic reptile community of Socotra. Rend. Fis. Acc. Lincei (2020) - get paper here
  • Garcia-Porta, Joan; Hernán E. Morales, Elena Gómez-Díaz, Roberto Sindaco, Salvador Carranza 2016. Patterns of diversification in islands: A comparative study across three gecko genera in the Socotra Archipelago. Molecular Phylogenetics and Evolution, doi:10.1016/j.ympev.2016.02.007 - get paper here
  • Razzetti, Edoardo; ROBERTO SINDACO, CRISTINA GRIECO, FRANCESCA PELLA, UGO ZILIANI, FABIO PUPIN, ELISA RISERVATO, DANIELE PELLITTERI-ROSA, LUCA BUTIKOFER, AHMED SAEED SULEIMAN, BADAR AWADH AL-ASEILY, CATERINA CARUGATI, ELEONORA BONCOMPAGNI & MAURO FAS 2011. Annotated checklist and distribution of the Socotran Archipelago Herpetofauna (Reptilia). Zootaxa 2826: 1–44 - get paper here
  • Rösler, H. 2000. Kommentierte Liste der rezent, subrezent und fossil bekannten Geckotaxa (Reptilia: Gekkonomorpha). Gekkota 2: 28-153
  • Rösler, H. & Wranik, W. 2004. A key and annotated checklist to the reptiles of the Socotra archipelago. Fauna of Arabia 20: 505-534
  • Rösler, H. & Wranik, W. 2006. Die Gecko-Inseln. 2. Teil: Die tagaktiven Geckos der Gattung Pristurus RÜPPEL, 1835, vom Sokotra Archipel, Jemen (Reptilia: Sauria: Gekkonidae). Sauria 28 (4): 17-26 - get paper here
  • Rösler, H. & Wranik,W. 1999. Beiträge zur Herpetologie der Republik Jemen. 5. Drei neue Gecko-Arten vom Sokotra-Archipel (Reptilia: Sauria: Gekkonidae). Zool. Abh. Mus. Tierk. Dresden 50 (2): 249-265
  • Rösler, H.; Köhler, J. & Böhme, W. 2008. A new species of the diurnal gekkonid genus Pristurus Rüppell, 1835 from the Red Sea island Hanish al-Kabir, Yemen. Amphibia-Reptilia 29: 217-227 - get paper here
  • Rösler,H. & Wranik,W. 2000. Die Geckofauna des Sokotra-Archipels (Sauria: Gekkonidae). Gekkota 2: 20-27
 
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