We classified species as geographically restricted if their
recorded latitudinal range was five degrees or less. The fauna
of Malaysia contains only one such restricted species, whereas
Central Thailand has four, Northwestern Thailand has 10, and
Northern Vietnam has 6. These proportions of latitudinally
restricted species do not differ significantly from chance
expectations based on the species richness of each region (2
x 4 table, χ2 = 5.4, p = 0.14). Furthermore, excluding restricted
species does not change to overall distribution of recorded
species richness (Table 1). Thus, local endemics are not an
explanation for observed species richness patterns.