Gastropholis

Gastropholis is a genus of Equatorial African lacertid lizards of the family Lacertidae which is distributed in southern Liberia, Ivory Coast and Ghana, western Cameroon, Equatorial Guinea, Democratic Republic of Congo, eastern Kenya, Tanzania and south to northeastern Mozambique.[2][3]

Gastropholis
Gastropholis echinata
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Family: Lacertidae
Subfamily: Lacertinae
Genus: Gastropholis
Fischer, 1886[1]
Species

See text.

Gastropholis tropidopholis
Head of Gastropholis tropidopholis
Head of Gastropholis echinata
Gastropholis vittata

Etymology

Gastropholis is derived from the ancient Greek words "gaster" (γαστήρ) which means "belly, stomach" and, "pholis" (φολῐ́ς), a "horny scale of a reptile". The common name of these lizards is Keel-bellied Lizards.[4]

Habitat and natural history

Not much is known but all species of this genus are diurnal, arboreal and often secretive. They inhabit forests, woodland and thicket of coastal plains from sea level to 2000 m altitude. Usually they live high up in the trees 10 m or more above ground level and hide in holes or under loose bark. For sun-basking and feeding (insects and other arthropods, also smaller lizards) they move on branches using their prehensile tails as balancing organs.[4]

Eggs are laid in moist tree holes. Gastropholis prasina is known to produce clutches of five-ten eggs. At 26-29 °C incubation temperature the eggs hatched after 61 days.[4][5]

Diagnosis

Gastropholis shares with the other genera of Equatorial African lacertids (EAL; Adolfus, Congolacerta, Holaspis) the consistently absent parietal foramen, the parietal scale extending to the edge of the parietal table and a single postnasal scale.[2]

The species of Gastropholis are characterized by a high ventral scale count (10-14 rows, other EAL only 6 rows transversely), keeled ventrals (smooth in all other EAL), and a long prehensile tail. Gastropholis species are the largest of the EAL clade with adult snout-vent lengths of 80–110 mm.[3] They are well adapted for climbing with their long limbs, hooked claws and long tails.[4] For a key to the species of Gastropholis see Arnold (1989).

Species

Four species are recognized:[6]

gollark: Right, yes, my way is for *two* points.
gollark: `y_1` is the `y` of the first point, I'm sure you can infer the rest.
gollark: `m = y_1-y_2/x_1-x_2`, `c = y_1 - mx_1`, I think.
gollark: You can rearrange the equation for `c` and substitute in one of the points to get `c`.
gollark: Straight lines have the equation `y = mx + c`, where m and c are constants. `m` is the gradient, which is just the difference in y between those points divided by the difference in x.

References
  1. "Gastropholis"
  2. Arnold 1989
  3. Greenbaum et al. 2011
  4. Spawls et al. 2002
  5. Ashe & Ashe 1999
  6. "Gastropholis" in The Reptile Data Base

Further reading
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