Rhizanthes lowii (Becc.) Harms. (Rafflesiaceae), a new record from Lanjak Entimau Wildlife Sanctuary, Sarawak, Malaysia

Rhizanthes lowii (Becc.) Harms., a new species record from the Lanjak Entimau Wildlife Sanctuary, Sarawak is re-described and illustrated. The blooms show outstanding features that include its orange-white batik pattern half-way through every tepal with very dense hairs covering the entire inner side of the tepals. Its host is Tetrastigma diepenhorstii (Vitaceae)

Phylogenetic position of Tarsius bancanus based on partial Cytochrome b DNA Sequences

This study was carried out to ascertain the molecular phylogenetic position of Tarsius bancanus among Malaysian primates based on the partial of Cytochrome b (cyt b) gene sequences. A total of five samples of Tarsius bancanus from Sabah, Malaysia, were used in this study. Several other Malaysian primates were also included in the analysis (Leaf monkeys (Presbytis and Trachypithecus), Macaques (Macaca), Siamang (Symphalangus) and Slow loris (Nycticebus). We also included DNA sequences of several prosimians (Galago, Cheirogaleus, Daubentonia, Indri, Avahi, Lemur and Lepilemur) from GenBank. In addition, one individual of orang utan (Pongo pygmaeus) and human (Homo sapiens) were used as outgroups to root the tree. All taxa were analysed using character method (Maximum Parsimony, MP) and distance method (Neighbor-Joining, NJ). From the 375 examined characters, 43.2% were constant characters while 4.8% characters were parsimony uninformative whereas 52.0% characters were parsimony informative. Tree topologies discriminated three major clades in which primitive primates, Old World Monkeys and Anthropoids belongs to their own monophyletic clades. Both MP and NJ trees showed that T. bancanus was placed in primitive primates group

Phylogenetic relationships of leaf monkeys (Presbytis; Colobinae) based on cytochrome b and 12S rRNA genes

Little is known about the classification and phylogenetic relationships of the leaf monkeys (Presbytis). We analyzed mitochondrial DNA sequences of cytochrome b (Cyt b) and 12S rRNA to determine the phylogenetic relationships of the genus Presbytis. Gene fragments of 388 and 371 bp of Cyt b and 12S rRNA, respectively, were sequenced from samples of Presbytis melalophos (subspecies femoralis, siamensis, robinsoni, and chrysomelas), P. rubicunda and P. hosei. The genus Trachypithecus (Cercopithecidae) was used as an outgroup. The Cyt b NJ and MP phylogeny trees showed P. m. chrysomelas to be the most primitive, followed by P. hosei, whereas 12S rRNA tree topology only indicated that these two species have close relationships with the other members of the genus. In our analysis, chrysomelas, previously classified as a subspecies of P. melalophos, was not included in either the P. m. femoralis clade or the P. m. siamensis clade. Whether or not there should be a separation at the species level remains to be clarified. The tree topologies also showed that P. m. siamensis is paraphyletic with P. m. robinsoni, and P. m. femoralis with P. rubicunda, in two different clades. Cyt b and 12S rRNA are good gene candidates for the study of phylogenetic relationships at the species level. However, the systematic relationships of some subspecies in this genus remain unclear

Phylogenetic relationships of Malaysian monkeys, Cercopithecidae, based on mitochondrial cytochrome c sequences

Mitochondrial DNA cytochrome c oxidase II (COII) gene sequences of Malaysian Cercopithecidae were examined to ascertain their phylogenetic relationships. Colobinae were represented by the genera Presbytis, Trachypithecus and Nasalis, while the genus Macaca represented Cercopithecinae. DNA amplification and sequencing of the COII gene was performed on 16 samples. Symphalangus syndactylus (Hylobatidae) was used as the outgroup. Data were analyzed using both character (maximum parsimony) and distance (neighbor-joining) methods. Tree topologies indicated that Colobinae and Cercopithecinae have their own distinct monophyletic clade. This result was well supported by bootstrap values and genetic distances derived from the Kimura-2-parameter algorithm. Separation of Macaca nemestrina from M. fascicularis was also well supported by bootstrap values. In addition, tree topologies indicate a good resolution of the Colobinae phylogenetic relationships at the intergeneric level, but with low bootstrap support. The position of Nasalis remained problematic in both trees. Overall, COII is a good gene candidate for portraying the phylogenetic relationships of Malaysian primates at the inter- and intra-subfamily levels

Is Malaysia’s banded langur, Presbytis femoralis femoralis, actually Presbytis neglectus neglectus? Taxonomic revision with new insights on the radiation history of the Presbytis species group in Southeast Asia

The disjunct distribution of Presbytis femoralis subspecies across Sumatra (P. f. percura), southern (P. f. femoralis) and northern (P. f. robinsoni) Peninsular Malaysia marks the unique vicariance events in the Sunda Shelf. However, the taxonomic positions and evolutionary history of P. f. femoralis are unresolved after decades of research. To elucidate this evolutionary history, we analyzed 501 base pairs of the mitochondrial HVSI gene from 25 individuals representing Malaysia’s banded langur, with the addition of 29 sequences of Asian Presbytis from Genbank. Our results revealed closer affinity of P. f. femoralis to P. m. mitrata and P. m. sumatrana while maintaining the monophyletic state of P. f. femoralis as compared to P. f. robinsoni. Two central theses were inferred from the results; (1) P. f. femoralis does not belong in the same species classification as P. f. robinsoni, and (2) P. f. femoralis is the basal lineage of the Presbytis in Peninsular Malaysia. Proving the first hypothesis through genetic analysis, we reassigned P. f. femoralis of Malaysia to Presbytis neglectus (Schlegel’s banded langur) (Schlegel in Revue Methodique, Museum d’Histoire Naturelle des Pays-Bas 7:1, 1876) following the International Code of Zoological Nomenclature (article 23.3). The ancestors of P. neglectus are hypothesized to have reached southern Peninsular Malaysia during the Pleistocene and survived in refugium along the western coast. Consequently, they radiated upward, forming P. f. robinsoni and P. siamensis resulting in the highly allopatric distribution in Peninsular Malaysia. This study has successfully resolved the taxonomic position of P. neglectus in Peninsular Malaysia while providing an alternative biogeographic theory for the Asian Presbytis

Two new Begonia species (Begoniaceae) and notes on extended distribution ofBegonia calcarea Ridl. from Sarawak, Borneo

Two new begonias from Sarawak are described and illustrated. Begonia hidiri Tawan, Ipor & Meekiong is a new species collected and recorded from Mount Murud areas. This hairy cane-like begonia belongs to Section Petermannia recorded at altitude more than 1600 1700 meters above sea level which occupied the damp and wet places of submontane mixed dipterocarp forests. Begonia kurakura Tawan, Ipor & Meekiong is a dwarf begonia from virgin hill mixed dipterocarp forest at 130 -140 meters altitude collected and recorded from Lanjak Entimau Wildlife Sanctuary. This beautiful species also belongs to section Diploclinium. Notes on extended distribution ofB. calcarea Rid!. are also included