Callosciurus Notatus Research Articles

COMPARISON OF ABUNDANCE OF RODENTS IN IMMATURE AND MATURE OIL PALM PLANTATIONS IN LAHAD DATU, SABAH

Regardless of palm age, rodents have been the main concern for oil palm planters. The present study examined the abundance of rodents in immature (1-3-year-old) and mature (18-20-year-old) oil palm plantations (FGVAS Sahabat 17) in Lahad Datu, Sabah. Over a period of 30 months, 150 cage traps were set in a 300-palm area for four consecutive nights each month for immature and mature palms, respectively. During the study, four rodent species, Callosciurus notatus, Rattus exulans, Rattus rattus diardii, and Maxomys whiteheadi were captured. In immature oil palm, R. exulans (53.59%) was the highest number recorded, and R. r. diardii (88.56%) was the highest number in mature oil palm. The total number of rats varied between immature and mature oil palms [t (54) = 7.392, p = 0.0001]. The ratio of the number of rodents captured in immature and mature oil palms was 4:1. There was a significant difference in the abundance of rats in immature and mature oil palms between the wet (U = 25.50, p = < 0.0003) and dry seasons (U = 12.50, p = < 0.001). This study identified the abundance of rodent species in immature and mature oil palm plantations as a baseline for rodent pest management. Keywords: Oil palm, rodent species, wet season, dry season, Lahad Datu.

Diversity and potential role of mammals in oil palm agroecosystem (case study in PT Permata Sawit Mandiri, West Kalimantan)

The palm oil industry as the mainstay sector is still accused of being unsustainable due to the high use of chemicals as fertilizer and pest control. These inefficiencies can cause environmental damage and increase production costs. Based on these problems, it is necessary to optimize the role of biodiversity to increase oil palm productivity. This study aims to identify the diversity of mammals in several types of land cover and to analyze the role of mammals in the oil palm agroecosystem. This research was carried out on 6 types of land cover at PT Permata Sawit Mandiri, West Kalimantan in January–April 2020. Diversity data was obtained using a combination of line transects and observation points, while role data was obtained through literature study. The transect method used measuring 100 × 1000 meters is one for each type of land cover. The observations were made in the morning (06.00-08.00) and afternoon (15.30-17.30) for three repetitions each time. The results showed that there were 60 individuals from 11 species belonging to 6 families. The highest number of encounters and species variation was found in HG land cover. Mammals are one of the taxa that play an important role in maintaining ecological processes. Based on the list of mammal species in the study area, five of these species have potential roles for the oil palm agorecosystem. These roles as seed dispersers include Callosciurus notatus; Callosciurus prevostii; and Macaca fascicularis, as well as pest controllers Prionailurus bengalensis and Helarctos malayanus. The HG land cover type has a complete composisition of the roles of mammals, while in the SS land cover, no mammal species play a role in the oil palm agroecosystem.

Morphological identification of the squirrel (Callosciurus notatus) tongue through Scanning Electron Microscopy (SEM) and histochemistry

Abstract. Megawati EI, Pradipta SID, Damia U, Kustiati U, Wihadmadyatami H, Kusindarta DL. 2023. Morphological identification of the squirrel (Callosciurus notatus) tongue through Scanning Electron Microscopy (SEM) and histochemistry. Biodiversitas 24: 2302-2314. Squirrel (Callosciurus notatus) plays an important role in the agricultural ecosystem.Their urine and feces kill coconut tree pests and help preserve coconut farming productivity. This research focuses on the morphological identification of the tongue and lingual papillae distribution of the Callosciurus notatus’stongue. The tongue morphology and lingual papillae distribution of Callosciurus notatus were investigated through two different methods: using scanning electron microscopy (SEM) and histology. This paper provides macroscopic and histological tongue morphology and lingual papillae distribution of Callosciurus notatus. Macroscopically, the tongue is divided into the apex, corpus, and radix. The dorsal surface of the apex the groove and lateral prominence were occur. SEM and light microscopy observation showed that the apex bears three types of papillae: leaf-like filiform, bifid filiform, and fungiform. The corpus includes wide leaf-like filiform papillae, saw-like filiform papillae, bifid filiform papillae, and fungiform papillae. On the radix, there are conical like filiform papillae, fungiform papillae, conical and vallatae papillae. The lateral part of radix showed Weber’s glands that react strongly positively by Alcian Blue (AB) pH 2.5 and periodic acid Schiff (PAS) staining; Weber’s glands consist of neutral and acidic mucin. Von Ebner’s glands were at the textus muscularis striatus syncytialis near the vallatae papillae, which react weakly positively to PAS stain and did not react to AB pH 2.5 stain; von Ebner’s glands consist of neutral mucin. Masson Trichromestain revealed collagen structure on lamina propria mucosae and textus muscularis striatus syncytialis of apex; moderately on lamina propria mucosae and lesser on textus muscularis striatus syncytialis of the corpus and radix.

Short Communication: Diversity of small mammals (non-volant) in tropical peatland ecosystem of Orang Kayo Hitam Forest Park, Jambi, Indonesia

Abstract. Dara W, Iswandaru D, Wulandari C, Novriyanti, Prasetia H. 2023. Short Communication: Diversity of small mammals (non-volant) in tropical peatland ecosystem of Orang Kayo Hitam Forest Park, Jambi, Indonesia. Intl J Bonorowo Wetlands 13: 30-35. Peatlands areas dominate Orang Kayo Hitam Forest Park (OKH Forest Park), Jambi, Indonesia. The largest forest fire in the OKH Forest Park area occurred in 2015, damaging more than 70% of the area. The event subsequently affected the existing biodiversity, especially the diversity of small mammals. Small mammals have an important role in the ecosystem as agents in regeneration and restoration, including in the OKH Forest Park. The method used is the cage trap method which is placed by systematic sampling. Traps were placed in two types of habitats, namely shrubs, and forests. The bait variation consisted of coconut, sweet potato, banana, and oil palm fruit. All baits were treated by burning to give off an aroma. The resulting data were analyzed quantitatively using the Shannon-Wiener Diversity Index. Types of small mammals found in shrubs and forest habitats are Malaysian field rats (Rattus tiomanicus (Miller, 1900)) and plantain squirrels (Callosciurus notatus (Boddaert, 1785)) The diversity index shows a low category with a value of (H' = 0.17884). That indicates the condition of the habitat in the post-burnt peat ecosystem is still relatively depressed.

Species Composition of Rodents at Padang Chong Forest Reserve, Perak

There are at least four families of rodents identified in Peninsular Malaysia namely Muridae, Sciuridae, Hystricidae, and Rhyzomidae. Although rodents are widespread throughout Peninsular Malaysia, information on rodents at Padang Chong Forest Reserve (PCFR) is scarce. Therefore, the main objective of this study is to identify and document the species composition of rodents at PCFR. Samplings were carried out at two plots along the gradient from the border of PCFR namely Plot 1 (500m) and Plot 2 (1km). The size of the respective plot is 1ha with 10 transect lines (AJ), 100m in length separately. These plots were sampled for five times from June to November 2022. Based on this study, a total of 65 individuals from nine species of rodent were documented. These nine species were identified from two families namely, Muridae (5 spp) and Sciuridae (4 spp). Of these, Leopoldamys sabanus was recorded as the highest captured species (25 individuals), followed by Maxomys whiteheadi (19 individuals) and Callosciurus notatus (7 individuals). There is no significant difference in terms of species composition between these plots, Plot 1 (n=33) and Plot 2 (n=32), which further supported by t-test value result (t-test=0.928; p(value)> 0.05). However, there is a single representative of Sundamys muelleri captured in Plot 1 which prefers the riverine area (around 10m). Callosciurus notatus were captured most in Plot 2 (6 individuals) compared to Plot 1 (1 individual). Certain areas nearby to Plot 2 were opened for agricultural purposes which explained the existence of this species at Plot 2. From this information, it is hoped that further actions can be taken to conserve the area to ensure the small mammal communities are preserved.

MORPHOLOGICAL CHARACTERIZATION OF PLANTAIN SQUIRREL (Callosciurus notatus) SPERM

The plantain squirrel (Callosciurus notatus) is a rodent of the family Sciuridae. The population of plantain squirrels in Indonesia has decreased every year. The 2019 Checklist of the Mammals of Indonesia reports that the plantain squirrel is in a low concentration status; thus, accelerated efforts in wildlife conservation, including integrating technology with conservation efforts, are necessary. This study aims to determine the morphological characteristic of the plantain squirrel spermatozoa. This research consisted of several stages: anesthesia of animal samples, surgery, a maceration method, observation of the spermatozoa morphology using William's staining, and morphometry of sperm using ImageJ 1.46r software. The results show that the plantain squirrel sperm has a slightly flat head shape, falciform with one apical hook, and a not too long tail. The average sperm head length is 1.87 ± 0.30 µm, the average sperm tail length is 5.48 ± 0.95 µm.

Genetic diversity and expanded host range of astroviruses detected in small mammals in Singapore

Astroviruses are a genetically diverse group of viruses that infect a wide range of hosts, including small mammals. Small mammals were trapped at 19 sites across Singapore from November 2011 to May 2014. Pooled oropharyngeal and rectal swabs (n = 518) and large intestine tissue (n = 107) were screened using a PCR to detect the presence of Astrovirus RNA-dependent RNA polymerase (RdRp) gene. Astroviruses were detected in 93 of 625 (14.9%) of samples tested, with eight of 11 species of rats, shrews, and squirrels testing positive. This is the first detection of astroviruses in seven species (Callosciurus notatus, Mus castaneus, Rattus tanezumi, Rattus tiomanicus, Sundamys annandalei, Suncus murinus and Tupaia glis). Phylogenetic analysis of 10 RdRp gene sequences revealed that astroviruses from Singapore small mammals fall in three distinct clades, one that is specific to the common treeshrew (Tupaia glis), and two comprised of multiple species. One of these includes viruses from the cave nectar bat (Eonycteris spelaea), two rodent species, and a squirrel, suggesting that virus spillover from bats to small mammals may have occurred. Our results show an increased host range for astroviruses and highlight their potential for intra- and inter-species transmission.

Molecular identification and phylogenetic analysis of a Callosciurus notatus complete mitogenome from Peninsular Malaysia

The mitogenome of a plantain squirrel, Callosciurus notatus, collected from Bukit Tarek Forest Reserve (Extension), Selangor, Malaysia was sequenced using BGISEQ-500RS technology. The 16,582 bp mitogenome consists of 13 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes, and 1 control region. A phylogenetic and BLASTn analysis against other available datasets showed that the mitogenome matched with 99.49% similarity to a previously published C. notatus mitogenome from Peninsular Malaysia. However, it also diverged by nearly 8% (92.24% match) from a second previously published mitogenome for the same species, sampled in East Kalimantan, Indonesia. This suggests a difference in landscape features between both localities might affect its genetic connectivity.

Morphological variation of plantain squirrel Callosciurus notatus (Boddaert, 1785) (Rodentia: Sciuridae) population in West Sumatra, Indonesia

Abstract. Tjong DH, Sari RM, Roesma DI. 2020. Morphological variation of plantain squirrel Callosciurus notatus (Boddaert, 1785) (Rodentia: Sciuridae) population in West Sumatra, Indonesia. Asian J For 21: 54-60. A study about the morphological variation of plantain squirrel among several populations in West Sumatra has been done in West Sumatra. There were 38 specimens of C. notatus collected from Padang, Lubuk Basung, Sangir, and Baso by using a survey and direct collection method. The morphometric measurement was conducted in the Laboratory of Genetic and Biomolecular, Department of Biology, Faculty of Mathematics and Natural Sciences, Andalas University. Morphological measurement data based on 21 external characters and 35 skull characters were analyzed by the Kruskall Wallis test, Principal Component Analysis (PCA), and Unweighted Pair Group Method Arithmetic Average (UPGMA). The result showed that there was morphological variation in ten body characters and nine skull characters. It is necessary to do further research to determine what environmental factors specifically influence certain morphological characters.

The effect of forest fire on the Squirrel and Tree Shrew community dynamic in Southern Sumatra

A study to investigate the effect of forest fire on the dynamic of squirrel and tree shrew community was conducted in the south of Bukit Barisan Selatan National Park (BBSNP), Lampung, Indonesia. The park is surrounded by agricultural and plantation areas but contains some of the largest intact tracts of lowland forest remaining on the island which undergoing the most rapid forest conversion. The study focused on 8 squirrel (Ratufa bicolor, R. affinis, Callosciurus notatus, C. nigrovittatus, Sundasciurus hippurus, S. lowii, S. tenuis, and Lariscus insignis; Mammalia: Rodentia) and 3 tree shrew species (Tupaia tana, T. glis and T. minor; Mammalia: Scandentia) and described how pre- and post-fire conditions of habitat affect the density and distribution of squirrels and tree shrews in the study area. Data were collected before the fire in 1997, then each year subsequently after that until 2001. The study showed that density was significantly lower after the fire and in the burned area. The ground dwelling species were the most suffered species as fire destroyed their preferred disturbed habitat more severely than the undisturbed ones. The study has showed that fire caused changes in habitats and would change the structure of the animal community.

Autecology of the common fishtail palm, Caryota mitis (Arecaceae), in Singapore

ABSTRACT The only Caryota species native to Singapore, C. mitis is an important ecological resource for a diversity of fauna. However, little is known about the autecology of this charismatic, commonly cultivated palm. This is the first study that focuses on the autecology of C. mitis in Singapore, investigating the following ecological attributes: (1) their population demography; (2) differences in densities of C. mitis individuals between forest edges and interiors, and different vegetation types in secondary forests of Singapore; (3) fruit set; and (4) resource utilization for food and shelter by fauna in Singapore. Our results demonstrate that C. mitis thrives under disturbance, with significantly more individuals found in highly disturbed vegetation type, and more juveniles to adults along forest edges compared to the interior. Fruit set of C. mitis was estimated to be 31.88%, with each infructescence producing on average 805 fruits (n= 15). Eighteen species of insects over four orders (Hymenoptera; Coleoptera; Lepidoptera; and Hemiptera) were observed to utilize C. mitis for either food or shelter, and camera trapping (n = 562 trap nights) revealed five vertebrate taxa foraging on the fruits – pink-necked green pigeon (Treron vernans), oriental pied hornbill (Anthracoceros albirostris), common palm civet (Paradoxurus musangus), long-tailed macaque (Macaca fasicularis) and plantain squirrel (Calloscirurus notatus). The ecological importance of C. mitis in maintaining food resources in the highly fragmented landscape of Singapore has important implications in reforestation and rehabilitation efforts in the region, considering their potential to thrive in disturbed habitats and along forest edges.

Diet composition of introduced barn owls (Tyto alba javanica) in urban area in comparison with agriculture settings

AbstractThis study investigated the diet of introduced barn owls (Tyto alba javanica, Gmelin) in the urban area of the Main Campus of Universiti Sains Malaysia, Penang, Malaysia, based on collected regurgitated pellets. We also compared the diet of the introduced barn owls with the diet of barn owls from two agricultural areas, i.e. oil palm plantations and rice fields. Pellet analysis of introduced barn owls showed that commensal Norway rats, Rattus norvegicus, made up the highest proportion of the diet (65.37% prey biomass) while common shrews, Suncus murinus were the second highest consumed prey (30.12% prey biomass). Common plantain squirrel, Callosciurus notatus, made up 4.45% of the diet while insects were taken in a relatively small amount (0.046% prey biomass). Introduced barn owls showed a preference for medium-sized prey, i.e. 40–120 g (52.96% biomass and 38.71% total). In agricultural areas, rice field rats, Rattus argentiventer predominated the diet of barn owls (98.24% prey biomass) in rice fields while Malayan wood rats, Rattus tiomanicus, were the most consumed prey in oil palm plantations (99.5% prey biomass). Food niche breadth value was highest for barn owls introduced in an urban area with a value of 2.90, and 1.06 in rice fields and 1.22 in oil palm plantations. Our analysis reiterates the prey preference of barn owls in various landscapes for small mammals. Our results also indicate the suitability of utilizing barn owls as a biological control not only in agricultural areas, but also as a biological control agent for commensal rodent pests in urban areas.

Estimation of Kapapa Bajing Population (Callosciurus notatus Boddaert, 1785) Family Sciuridae in Nagari Koto Dalam, Padang Sago, Sumatera Barat

Estimation of the plantain squirrel (Callosciurus notatus Boddaert, 1785) population was conducted from Februari to May 2016. This study aimed to estimate population density in the traditional coconut plantation, Nagari Koto Dalam, Padang Pariaman. The population density was estimated using line transect survey method. Population density of the squirrels in Nagari Koto Dalam was 5.5 ind/ha. This study shows that population density of the squirrel comparable to previous studies in West Sumatra.

Species diversity and population distribution of arboreal mammals in Kemuning Forest, Temanggung, Central Java, Indonesia

Krisanti AA, Widiyani T, Imron MA. 2017. Species diversity and population distribution of arboreal mammals in Kemuning Forest, Temanggung, Central Java, Indonesia. Biodiversitas 18: 1190-1195. Arboreal mammals which spent their life on the trees have significant roles for ecosystem balance and sustainability of forest ecosystem. This research aimed to reveal the diversity, population distribution, and the habitat used by arboreal mammals in Kemuning Forest of Bejen, Temanggung, Central Java, Indonesia. We conducted observation on the presence of arboreal mammals during four weeks started from April to July 2016. The observation was done within various times a day depends on the weather. 30 strips transect (ST) with 200m in length were established following the existing walking path for species identification. Point-quarter samplings (PQS) were used at every 50m of the track length for measuring diversity, density, and determining the dominant vegetation. There were 137 individuals of arboreal mammals detected and classified in 6 species, i.e., Callosciurus notatus, Ratufa bicolor, Galeopterus variegatus, Macaca fascicularis, Trachypithecus auratus, and Nycteris javanica. The largest population was M. fascicularis while the smallest was G. variegatus. There were 28 species of identified trees. Animals were observed in 22 tracks while the other six tracks were out of detected animals, so the relative frequency of animal was 80%. Diversity indices (H’) of the animal were 1.342, whereas the vegetation diversity indices were 2.795. Dominant vegetation species were Ficus macrophylla (36%). The arboreal mammals were distributed in a clumped pattern. We concluded that Kemuning Forest had the potential to be the suitable habitat for arboreal mammals with better managements.

Diversity and biomass of terrestrial small mammals at a Malaysian primary rainforest reserve (Segari Melintang Forest Reserve, Peninsular Malaysia)

Despite their importance for the rain forest ecosystem, still not much known about the community composition of small frugivorous mammals in West-Malaysian forests. Therefore, we conducted a mark and recapture study in four 100 m x 100 m sized plots in a lowland Dipterocarp forest of Peninsular Malaysia for 4000 trap nights. Plots hosted either Dipterocarp forest or alluvial fresh water swamp vegetation. We assumed that small mammal assemblages varied between these two vegetation types. In total 249 different individuals of 14 species (9 genera) were caught, comprising rodents and treeshrews. The most abundant species was the common tree shrew ( Tupaia gli s, 25.8 individuals ha -1 ), followed the plantain squirrel ( Callosciurus notatus , 10.25 individuals ha -1 ) and the grey tree rat ( Lenothrix canus , 10.0 individuals ha -1 ). These three species accounted for 77.8% of the total small mammals biomass per hectare. Sex-ratio of treeshrews and squirrel species was found at 1:1, whereas Muridae showed male-biased sex-ratios. Shannon-diversity indices (H) of all trapping plots ranged at mediocre level. Plot comparison (Bray-Curtis indices) showed that plots with similar vegetation types were not more similar in their small mammal community structure. Other factors, such as distance to the forest edge and joining oil palm plantations seemed to influence species abundances. Small mammals belong to the less studied species in local rain forests, thus studying their ecology is vital in order to act towards general conservational issues.

Bartonella jaculi sp. nov., Bartonella callosciuri sp. nov., Bartonella pachyuromydis sp. nov. and Bartonella acomydis sp. nov., isolated from wild Rodentia

Four novel strains of members of the genus Bartonella, OY2-1(T), BR11-1(T), FN15-2(T) and KS2-1(T), were isolated from the blood of wild-captured greater Egyptian jerboa (Jaculus orientalis), plantain squirrel (Callosciurus notatus), fat-tailed gerbil (Pachyuromys duprasi) and golden spiny mouse (Acomys russatus). All the animals were imported to Japan as pets from Egypt, Thailand and the Netherlands. The phenotypic characterization (growth conditions, incubation periods, biochemical properties and cell morphologies), DNA G+C contents (37.4 mol% for strain OY2-1(T), 35.5 mol% for strain BR11-1(T), 35.7 mol% for strain FN15-2(T) and 37.2 mol% for strain KS2-1(T)), and sequence analyses of the 16S rRNA genes indicated that those strains belong to the genus Bartonella. Sequence comparisons of gltA and rpoB genes suggested that all of the strains should be classified as novel species of the genus Bartonella. In phylogenetic trees based on the concatenated sequences of five loci, including the 16S rRNA, ftsZ, gltA and rpoB genes and the ITS region, and on the concatenated deduced amino acid sequences of three housekeeping genes (ftsZ, gltA and rpoB), all strains formed distinct clades and had unique mammalian hosts that could be discriminated from other known species of the genus Bartonella. These data strongly support the hypothesis that strains OY2-1(T), BR11-1(T), FN15-2(T) and KS2-1(T) should be classified as representing novel species of the genus Bartonella. The names Bartonella jaculi sp. nov., Bartonella callosciuri sp. nov., Bartonella pachyuromydis sp. nov. and Bartonella acomydis sp. nov. are proposed for these novel species. Type strains of Bartonella jaculi sp. nov., Bartonella callosciuri sp. nov., Bartonella pachyuromydis sp. nov. and Bartonella acomydis sp. nov. are OY2-1(T) ( = JCM 17712(T) = KCTC 23655(T)), BR11-1(T) ( = JCM 17709(T) = KCTC 23909(T)), FN15-2(T) ( = JCM 17714(T) = KCTC 23657(T)) and KS2-1(T) ( = JCM 17706(T) = KCTC 23907(T)), respectively.

Niche segregation among three sympatric species of squirrels inhabiting a lowland dipterocarp forest, Peninsular Malaysia

Niche segregation among three sympatric species of squirrels, Callosciurus notatus, C. caniceps and Sundasciurus lowii inhabiting a lowland dipterocarp forest was studied in the Ulu Gombak Forest Reserve, Selangor Darul Ehsan, Malaysia. Diurnal activity of the three species had two peaks. Sundasciurus lowii and C. caniceps were more restricted in vertical space, concentrated mainly at lower tree heights, whereas C. notatus was slightly less restricted. Sundasciurus lowii were more selective in their diet: bark was the main food item. The two Callosciurus spp. took a variety of food items, although fruit was the major component. The niche breadth values in diurnal activity patterns, vertical space uses, and food preferences revealed that C. notatus was a generalist compared with the other two species. Differences in selection of tree species rather than food item may be the main factors that determine niche occupancy for the three species of squirrels in the study area.

Allassogonoporus callosciuri n. sp. (Digenea: Allassogonoporidae) from the plantain squirrel Callosciurus notatus (Boddaert) (Rodentia: Sciuridae) in Borneo.

A new digenean, Allassogonoporus callosciuri n. sp. from the plantain squirrel Callosciurus notatus from the Malaysian state of Sarawak, Borneo, is described. The new species differs from: A. amphoraeformis by the size of the ventral sucker and the position of the vitellarium and uterus; and from A. marginalis by the smaller oral sucker, the position of the testes and vitellarium; from A. vespertilionis by the position of the vitellarium, testes and ovary; from A. asymmetrica by the position of the testes and uterus. Gilford's (1955) and Dubois' (1963) opinions on the synonymy of Allassogonoporus and Myotitrema is supported. No representatives of the family Allassogonoporidae have been reported previously from sciurids or South-East Asia.

Fibricola ramachandrani (Betterton, 1976) Palmieri, Krishnasamy and Sullivan comb. nov. from Malaysian rodent hosts with a special note on intraspecific morphological variation.

Neodiplostomum (Conodiplostomum) ramachandrani Betterton, 1976 has been reported from four species of rodent hosts: Echinosorex gymnurus (Raffles): Rattus whiteheadi (Thos); R. muelleri (Jentink) and Callosciurus notatus (Boddaert). A comparison of trematodes recovered from these hosts revealed patterns of host-induced morphological variation taking place. Because N. (Conodiplostomum) ramachandrani shows little generic difference from Fibricola intermedius (Pearson, 1959) Sudarikov, 1960 it is transferred to the genus Fibricola and is now designated Fibricola ramachandrani (Betterton, 1976) Palmieri, Krishnasamy and Sullivan.

New species of Eimeria (Protozoa: Eimeriidae) from Malaysian squirrels.

SYNOPSIS. In a survey of 520 squirrels of 19 species from Malaysia, 6 new species of Eimeria were found. Three are described from the subfamily Petauristinae: E. kylopetis n. sp. from the red‐cheeked flying squirrel Hylopetes spadiceus; E. aeromysis n. sp. from the large black flying squirrel Aeromys tephromelas; E. malayensis n. sp. from the spotted giant flying squirrel Petaurista elegans. Three are described from the subfamily Sciurinae: E. hippuri n. sp. from the horse‐tailed squirrel Sundasciurus hippurus; and E. notati and E. pahangi n. spp. from the plantain squirrel Callosciurus notatus.