Chersobius signatus
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Through Species, Endemism and Habitat destruction
Distribution and subspecies
C. signatus is naturally restricted to a small area in Little Namaqualand, an arid region in the west of South Africa, where it normally lives on rocky outcrops and forages among the rocks for the tiny succulent plants it eats. There are multiple bacteria species and fungi that co-depend on these tortoises as their home. (Galosi 2021).
In the past, two subspecies were recognized, the Namaqualand speckled padloper (C. s. signatus) and the southern speckled padloper (C. s. cafer), but genetic studies have determined this was not supported and they are now considered a single species.
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Description
The males of C. signatus measure 6–8 cm (2.4–3.1 in) in straight carapace length, while the larger females measure up to almost 10 cm (3.9 in); they weigh about 95–165 g (3.4–5.8 oz). This species has a flattened shell with slightly serrated edges. The orange-brown shell is covered in hundreds of black spots. The males have a noticeably concave belly.
This tiny tortoise can be distinguished from the other Chersobius species by its speckles, and by five toes on its fore feet (unlike many of its relatives, which have four toes on all four feet).
Life cycle and behaviour
Speckled padlopers are most active in the early morning (especially in autumn and spring, when they breed). Living among the rocky outcrops, they feed on small succulents that grow between the rocks and are small enough to reach. Their courtship involves the male and female nodding their heads at each other. After mating, the female makes a nest of several eggs in damp soil between the rocks. The hatchlings are under 7 grams and 30 mm (1.2 in) long, and emerge after 100 to 120 days. The eggshells have calcareous layers that are crystallized (Loehr). Whi The average mature female speckled tortoise produces about ≤ 5 eggs per year.
Threats and conservation
C. signatus is threatened by traffic on roads, habitat destruction, and poaching for the pet trade. As the trade in collected Chersobius species is strictly illegal and any captive specimens are systematically registered in noncommercial studbooks in South Africa and Namibia, any commercial sale of Chersobius tortoises is almost without exception strictly illegal. Another threat comes from introduced species, such as domestic dogs and pigs.
Many are taken from their natural habitat each year, and nearly all subsequently die as a result, as they do not readily adapt to typical captive diets and environmental change. Unlike most other Chersobius species, however, their diet (while very varied) is not highly specialised. Therefore, the species can adapt well to captivity, provided that proper attention is paid to temperature, humidity, and a sufficiently varied diet. They can be very hardy in captivity, and most problems with captive care are caused by faulty nutrition, high humidity, dampness, or bad husbandry.