A study on morphometrical variations of Malaysian Hylarana signata group was conducted to reveal the morphological relationships within the species group. Twenty-seven morphological characters from 18 individuals of H. signata and H. picturata were measured and recorded. The numerical data were analysed using Discriminant Function Analysis in SPSS program version 16.0 and UPGMA Cluster Analysis in Minitab program version 14.0. The results show the complexity clustering between the examined species that might be due to ancient polymorphism of the lineages or cryptic species within the group. Hence, further study should include more representatives in order to fully elucidate the morphological relationships of H. signata group.

No abstract

The notorious palm weevils from the genus Rhynchophorus (Coleoptera: Curculionidae) are known to be polymorphic and show high phenotypic plasticity. Due to these characteristics, this study attempts to document the typologies based on the pronotal markings observed from Kuala Terengganu population. Samples were collected using baited traps with pheromones and fruits as well as through handpicking method, where the sampling sites were located at two villages, namely, Kampung Tanjung Paya and Kampung Pulau Sekati. A total of 100 individuals were collected of which 19 typologies were successfully identified. Of all, the most prominent pattern observed was typology A, represented by 37 individuals. Findings from this study suggested that the variation was driven by various factors including resource limitation, habitat preference, diet preference and competition. However, a comprehensive study should be initiated to measure possible factor(s) which possibly induce the pronotal variation within Rhynchophorus at a local scale.

The largest peatland in Malaysia is in Sarawak with approximately 1.66 million ha (13%) of total area, distributed widely in Sibu division followed by Sri Aman, Miri, Kota Samarahan, Sarikei and Bintulu. Despite being the most diverse animal species, the study of insects in peat swamp forest, particularly beetles, is still in the incipient stage. Therefore, this study aimed to provide recent information on the beetle species composition in a peat swamp forest of Real Living Lab, UNIMAS (RLL) located in Kota Samarahan. Beetles were sampled for five consecutive days and nights within a seven-day sampling trip in August 2020. Three sampling methods were employed in this study, namely handpicking method (HPM), modified Pennsylvanian light trap (MPLT) and pitfall trapping (PFT). A total of 15 families representing 37 species and morphospecies with 185 individuals were successfully collected. The most speciose family from the beetle assemblages in RLL is Scarabaeidae with eight species collected (21.62%), followed by Curculionidae with six species (16.22%) and Staphylinidae with five species (13.51%). The most abundant family was also represented by Scarabaeidae with 64 individuals (34.59%), followed by Scolytidae with 27 individuals (14.59%) and Carabidae with 23 individuals (12.43%), respectively. This suggests that these families are good candidates as biodiversity indicator of peat swamp forests. This study is still in its preliminary stage; hence it is important to conduct further beetle samplings in future to better understand the potential of beetle as a bioindicator in the peat swamp habitat as an effort to conserve and protect the habitat and the biodiversity that came along with it.