''Platysaurus broadleyi'', also known commonly as the Augrabies flat lizard and Broadley's flat lizard, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

lizard Lizards are a widespread group of squamate reptiles, with over 7,000 species, ranging across all continents except Antarctica, as well as most oceanic island chains. The group is paraphyletic since it excludes the snakes and Amphisbaenia alt ...

in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Cordylidae Cordylidae is a family of small- to medium-sized lizards that occur in southern and eastern Africa. They are commonly known as girdled lizards, spinytail lizards, or girdle-tail lizards. Cordylidae is closely related to the family Gerrhosauridae ...

. The species is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

South Africa South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countri ...

. Beolens B, Watkins M, Grayson M (2011). ''The Eponym Dictionary of Reptiles''. Baltimore: Johns Hopkins University Press. xiii + 296 pp. . (''Platysaurus broadleyi'', p. 39).

Etymology

Both the specific name, ''broadleyi'', and one of the common names, Broadley's flat lizard, are in honor of African

herpetologist Herpetology (from Greek ἑρπετόν ''herpetón'', meaning "reptile" or "creeping animal") is the branch of zoology concerned with the study of amphibians (including frogs, toads, salamanders, newts, and caecilians (gymnophiona)) and rept ...

Donald George Broadley Donald George Broadley (1932–2016) was an African herpetologist. He described as new to science 115 species and subspecies, and 8 genera and subgenera of reptiles. He was one of the founders of the Herpetological Association of Africa (initial ...

Geographic range

The Augrabies flat lizard has its geographic range between

Augrabies Falls The Augrabies Falls is a waterfall on the Orange River, the largest river in South Africa. Since 1966 the waterfall, set in a desolate and rugged milieu, is enclosed by the Augrabies Falls National Park. The falls are around in height. Some so ...

and

Pella, Northern Cape Pella is an oasis in Namakwa District Municipality, Namakwa (Bushmanland, Northern Cape, Bushmanland) in the Northern Cape province of South Africa. Earlier known as Cammas Fonteyn, the spring was used by a nearby stronghold of Bushmen, San people. ...

. This area includes the lower

Orange River The Orange River (from Afrikaans/Dutch: ''Oranjerivier'') is a river in Southern Africa. It is the longest river in South Africa. With a total length of , the Orange River Basin extends from Lesotho into South Africa and Namibia to the north ...

Northern Cape Province The Northern Cape is the largest and most sparsely populated province of South Africa. It was created in 1994 when the Cape Province was split up. Its capital is Kimberley, South Africa, Kimberley. It includes the Kalahari Gemsbok National Park, ...

, and

Gordonia District Gordonia may refer to: Biology *Gordonia (plant), ''Gordonia'' (plant), a genus of flowering plants native to Southeast Asia and the Americas *Gordonia (bacterium), ''Gordonia'' (bacterium), a genus of bacteria *Gordonia (synapsid), ''Gordonia'' (s ...

Habitat

The preferred natural

habitat In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...

of ''P. broadleyi'' is rocky areas in both

savanna A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to ...

and

shrubland Shrubland, scrubland, scrub, brush, or bush is a plant community characterized by vegetation dominated by shrubs, often also including grasses, herbs, and geophytes. Shrubland may either occur naturally or be the result of human activity. It m ...

, at altitudes of .

Description

A female at Augrabies Falls National Park ''P. broadleyi'' females and juveniles have a dark brown back, with three thick, cream stripes on the back. These stripes may be broken up into spots, or have spots in between the stripes. The belly is white, sometimes with a black dot on it, and at the rear there is an orange color. The tail is straw-colored. Adult males have a bluish head and a greenish back. A darker area in the middle and the vestiges of the juvenile stripes and spots are also present. The forelimbs are yellow to orange, the throat is dark blue, and the belly is black in the front but becomes orange near the tail. Above the tail, it is a tan color, while below and on the sides, it is orange. All this coloration, while helping to attract females, also has a downside: predators such as

kestrel The term kestrel (from french: crécerelle, derivative from , i.e. ratchet) is the common name given to several species of predatory birds from the falcon genus ''Falco''. Kestrels are most easily distinguished by their typical hunting behaviour ...

s easily spot them. Females, on the other hand, have much more subdued coloration and are less likely to be eaten. The Augrabies flat lizard is very similar to ''

Platysaurus capensis The Cape flat lizard or Namaqua flat lizard (''Platysaurus capensis'') is a lizard in the Cordylidae family found in Namibia and South Africa. Description Females and juveniles have a dark brown back with three wide white stripes which run down ...

'', or the Cape flat lizard, in scalation, but differs in having finer scalation on top of the forelimbs. Medium-sized for its

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

, ''P. broadleyi'' may attain a snout-to-vent length (SVL) of .

Habits

Augrabies flat lizards are common on the granite walls of

Augrabies Falls National Park Augrabies Falls National Park is a national park located around the Augrabies Falls, about 120 km west of Upington in the Northern Cape Province, South Africa. It was established in 1966. The Augrabies Falls National Park covers an area of ...

, where they are exposed to thousands of tourists. In summer, they perform acrobatic leaps to catch

black flies A black fly or blackfly (sometimes called a buffalo gnat, turkey gnat, or white socks) is any member of the family Simuliidae of the Culicomorpha infraorder. It is related to the Ceratopogonidae, Chironomidae, and Thaumaleidae. Over 2,200 speci ...

on the wing from the swarms that gather near rivers, but they will also eat ripe berries of Namaqua figs. Augrabies flat lizards will follow bird flocks to find these fruit-laden trees. One major predator of this lizard is the

rock kestrel The rock kestrel (''Falco rupicolus'') is a bird of prey species belonging to the kestrel group of the falcon family (biology), family Falconidae. It was previously considered a subspecies of the common kestrel (''Falco tinnunculus''). This spec ...

. Research indicates that the higher the UV levels on a male's throat, the more dominant it is and is less likely to be challenged. These flat lizards have been discovered to have a much higher visual sensitivity to UV light than other lizards species, allowing males to accurately distinguish between conspecifics of various fitness. They have as many as three times the number of UV

photoreceptor cells A photoreceptor cell is a specialized type of neuroepithelial cell found in the retina that is capable of visual phototransduction. The great biological importance of photoreceptors is that they convert light (visible electromagnetic radiatio ...

in their retina compared to other lizards.

Breeding

Sexual maturity in ''P. broadleyi'' is reached at around snout-vent length for both sexes. Females lay two clutches of eggs in early summer. Males demonstrate a preference for larger female mates, most likely due to the positive correlation between the size of a female and the eggs she produces.

References

External links

More informationBroadley's flat lizard at Aughrabies
{{Taxonbar, from=Q3019561 Platysaurus Endemic reptiles of South Africa Lizards of Africa Reptiles described in 1997 Taxa named by William Roy Branch