The Bornean representatives of the genus Georissa (Hydrocenidae) have small, dextral, conical, calcareous shells consisting of ca. three teleoconch whorls. Our recent study on the Georissa of Malaysian Borneo has revealed high intra- and inter-specific variation in the “scaly” group (a group of species with striking scale-like surface sculpture). The present study on the “non-scaly” Georissa is the continuation of the species revision for the genus. The “non-scaly” species are also diverse in shell sculptures. This informal group comprises Georissa with subtle spiral and/or radial sculpture. The combination of detailed conchological assessment and molecular analyses provides clear distinctions for each of the species. Conchological, molecular, and biogeographic details are presented for 16 species of “non-scaly” Georissa. Three of these are new to science, namely Georissacorrugatasp. n., Georissainsulaesp. n., and Georissatrusmadisp. n.

Bat survey was conducted in Bako National Park from 25th to 29th August 2013. A total of 107 individuals from11 species of bats were recorded. Hipposideros cervinus was recorded as the most abundance species with 51individuals while Murina suilla and Rhinolophus affinis were the least abundant with one individual each fromtotal captures. This study has added R. affinis as another new species locality record for the national park. Thisbrings up the total bat species known from the park now to 35 species of bats. Interestingly, an individual of H.cervinus with partial albinism was caught during this survey. This single bat was captured on the 27th August2013 and will be the first albino bat reported in Borneo and possibly Malaysia. This specimen is an adultfemale that presents high degree of albinism over most of the body but lacking on the upperparts of the bodyand part of the wings. Detailed description based on 16 external and craniodental measurements are presentedherein along with their species identification through genetic analyses. Further research on the genetic structureand behavior of an albino individual may help to identify the possible causes and consequences of albinism tothe bats populations.

Parallel evolution in phenotype may result when closely related taxa are adapting in the face of similar ecological pressures. Here, we discuss possible parallelism in shell morphology in the context of the microgeographic phylogeography of two conchologically distinct sympatric hydrocenid snails inhabiting a limestone outcrop and its cave system, Georissa pyrrhoderma and Georissa silaburensis, respectively, at Mount Silabur in Sarawak, Malaysian Borneo. Our results show a certain degree of morphological parallelism of a third, possibly new, cryptic Georissa species within the same cave that strongly diverged from its above‐ground sister species, G. pyrrhoderma. We found that both sympatric cave species have shifted from a more sculptured, conical shell toward a broader, less sculptured form.