Displaying publications 481 - 500 of 1008 in total

Abstract:
Sort:
  1. Unusual Dental Morphology in a Chimpanzee: A Case Report Utilizing Cone-Beam Computed Tomography
    Al-Amery SM, Nambiar P, John J, Purmal K, Ngeow WC, Mohamed NH, et al.
    J Vet Dent, 2018 Jun;35(2):96-102.
    PMID: 29865987 DOI: 10.1177/0898756418776448
    This case report illustrates the teeth morphology of a chimpanzee and its anatomical variations. A well-preserved skull of a male Pan troglodytes troglodyte chimpanzee was scanned using a cone-beam computed tomography machine. Measurements included tooth and crown height, root length, root canal length and width (posterior teeth), and pulp cavity length (anterior teeth). Nonmetrical parameters included number of canals and foramina per root of every root. Interestingly, the mandibular central incisor was longer than the lateral incisor, and all the mandibular anterior teeth presented with a solitary flame-shaped or conical-calcified structure in their pulp cavity. The premolars are usually dual rooted except for the first maxillary premolar that displayed 3 roots. Other unusual discoveries were the presence of bilateral radicular dens invaginatus in the mandibular first premolars and the possibility of having 2 canals and 2 foramina in the roots of the posterior teeth. The presence of conical stone mineralizations at the pulp cavity and the presence of dens invaginatus were of particular interest.
    Matched MeSH terms: Pan troglodytes/anatomy & histology*
  2. Fulltext A new species of Brachiella (Copepoda, Siphonostomatoida, Lernaeopodidae) from Peninsular Malaysia, with relegation of two genera Charopinopsis and Eobrachiella to junior synonyms of Brachiella
    Ohtsuka S, Piasecki W, Ismail N, Kamarudin AS
    Parasite, 2020;27:40.
    PMID: 32463013 DOI: 10.1051/parasite/2020038
    Both sexes of Brachiella malayensis n. sp. are described on the basis of specimens found in the nostrils of narrow-barred Spanish mackerel Scomberomorus commerson (Lacepède) collected off Besut, Malaysia. The female of this species closely resembles those of B. magna Kabata, 1968 and B. cybii Pillai, Prabha et Balaraman, 1982 but is distinguishable mainly by the body size and the proportions of the cephalosome, posterior processes and caudal rami. While examining the male, we noticed a systematic inconsistency in some lernaeopodid genera. The genus Brachiella Cuvier, 1830, represented by its type-species Brachiella thynni Cuvier, 1830, and two monotypic genera Charopinopsis Yamaguti, 1963 and Eobrachiella Ho et Do, 1984, represented by Charopinopsis quaternia (Wilson, 1935) and Eobrachiella elegans (Richiardi, 1880), respectively, share distinct synapomorphies in the embracing (vs. pinching) elongate male maxilliped and the female trunk with a pair of long, cylindrical ventroposterior processes (in addition to a pair of modified caudal rami), both of which are involved in their unique reproductive strategy. The latter two genera are herewith relegated to junior synonyms of Brachiella.
    Matched MeSH terms: Copepoda/anatomy & histology*
  3. Fulltext Building a DNA barcode reference library for the true butterflies (Lepidoptera) of Peninsula Malaysia: what about the subspecies?
    Wilson JJ, Sing KW, Sofian-Azirun M
    PLoS One, 2013;8(11):e79969.
    PMID: 24282514 DOI: 10.1371/journal.pone.0079969
    The objective of this study was to build a DNA barcode reference library for the true butterflies of Peninsula Malaysia and assess the value of attaching subspecies names to DNA barcode records. A new DNA barcode library was constructed with butterflies from the Museum of Zoology, University of Malaya collection. The library was analysed in conjunction with publicly available DNA barcodes from other Asia-Pacific localities to test the ability of the DNA barcodes to discriminate species and subspecies. Analyses confirmed the capacity of the new DNA barcode reference library to distinguish the vast majority of species (92%) and revealed that most subspecies possessed unique DNA barcodes (84%). In some cases conspecific subspecies exhibited genetic distances between their DNA barcodes that are typically seen between species, and these were often taxa that have previously been regarded as full species. Subspecies designations as shorthand for geographically and morphologically differentiated groups provide a useful heuristic for assessing how such groups correlate with clustering patterns of DNA barcodes, especially as the number of DNA barcodes per species in reference libraries increases. Our study demonstrates the value in attaching subspecies names to DNA barcode records as they can reveal a history of taxonomic concepts and expose important units of biodiversity.
    Matched MeSH terms: Butterflies/anatomy & histology
  4. Fulltext Functional data geometric morphometrics with machine learning for craniodental shape classification in shrews
    Pillay AB, Pathmanathan D, Dabo-Niang S, Abu A, Omar H
    Sci Rep, 2024 Jul 06;14(1):15579.
    PMID: 38971911 DOI: 10.1038/s41598-024-66246-z
    This work proposes a functional data analysis approach for morphometrics in classifying three shrew species (S. murinus, C. monticola, and C. malayana) from Peninsular Malaysia. Functional data geometric morphometrics (FDGM) for 2D landmark data is introduced and its performance is compared with classical geometric morphometrics (GM). The FDGM approach converts 2D landmark data into continuous curves, which are then represented as linear combinations of basis functions. The landmark data was obtained from 89 crania of shrew specimens based on three craniodental views (dorsal, jaw, and lateral). Principal component analysis and linear discriminant analysis were applied to both GM and FDGM methods to classify the three shrew species. This study also compared four machine learning approaches (naïve Bayes, support vector machine, random forest, and generalised linear model) using predicted PC scores obtained from both methods (a combination of all three craniodental views and individual views). The analyses favoured FDGM and the dorsal view was the best view for distinguishing the three species.
    Matched MeSH terms: Skull/anatomy & histology
  5. Evidence for the existence of genetic variability in the tendency of Anopheles balabacensis to rest in houses and to bite man
    Hii JL
    Southeast Asian J Trop Med Public Health, 1985 Mar;16(1):173-82.
    PMID: 3839602
    Mark-release-recapture experiments were carried out in Sabah, East Malaysia on the malaria and filariasis vector, Anopheles balabacensis. Samples of wild females were marked with different colours of fluorescent pigments, released in man-baited huts fitted with exit traps. Simultaneous collections and releases were also made in night-biting catches on a water buffalo and on four men. All subsequent recaptures were made in the same situation in which the mosquitoes were marked. The same individual mosquitoes were caught biting men and buffalo on different occasions and the numbers caught showed a strong preference for man over buffalo. The length of the oviposition cycle in the field was found to be 3.0 days. After blood-feeding on man in a hut, An. balabacensis were found to exit on the night or early morning. The same individual mosquitoes were found resting in the hut or exit trap on different occasions. The results indicate that there is strong evidence for the existence of genetic variability in the tendency of An. balabacensis to rest in houses and to bite man and buffalo. The obvious existence of this phenomenon is considered discouraging for the prospects of interruption of malaria transmitted by An. balabacensis in nature.
    Matched MeSH terms: Anopheles/anatomy & histology
  6. Co-existence and attempted hybridization between Anopheles litoralis (King) and Anopheles sundaicus (Rodenwaldt) in Sabah, Malaysia
    Hii JL
    Southeast Asian J Trop Med Public Health, 1978 Sep;9(3):384-9.
    PMID: 749225
    Anopheles (Cellia) litoralis King and Anopheles (Cellia) sundaicus Rodenwaldt, vectors of malaria, were collected from the same brackis and sea-water habitats in six localities in Sabah. They share the same breeding habitats with predominance of one species over the other. The two species although distinct have small morphological differences and are taxonomically separated by certain wing characters. Hybridization between the two species was successful. Reciprocal crosses produced viable progeny which appeared to develop normally to adults. Hybridized females laid fewer viable eggs in comparison with the parents. The F1 hybrids resembled the litoralis parent in most characters. Backcrosses of both litoralis and sundaicus parents with the F1 hybrids yielded no eggs. F1 male hybrids were thus assumed to be sterile. The results obtained from cross matings between the two species suggested something more than subspecific status.
    Matched MeSH terms: Anopheles/anatomy & histology
  7. Contralateral Nasofrontal Trephination: A Novel Corridor for a "Dual Port" Approach to the Petrous Apex
    Abouammo MD, Narayanan MS, Alsavaf MB, Alwabili M, Gosal JS, Bhuskute GS, et al.
    Oper Neurosurg (Hagerstown), 2024 Sep 01;27(3):347-356.
    PMID: 38506519 DOI: 10.1227/ons.0000000000001119
    BACKGROUND AND OBJECTIVES: Expanded endonasal approaches (EEAs) have proven safe and effective in treating select petrous apex (PA) pathologies. Angled endoscopes and instruments have expanded indications for such approaches; however, the complex neurovascular anatomy surrounding the petrous region remains a significant challenge. This study evaluates the feasibility, anatomic aspects, and limitations of a contralateral nasofrontal trephination (CNT) route as a complementary corridor improving access to the PA.

    METHODS: Expanded endonasal and CNT approaches to the PA were carried out bilaterally in 15 cadaveric heads with endovascular latex injections. The distance to the PA, angle between instruments through the 2 approach portals, and surgical freedom were measured and compared.

    RESULTS: Three-dimensional DICOM-based modeling and visualization indicate that the CNT route reduces the distance to the target located within the contralateral PA by an average of 3.33 cm (19%) and affords a significant increase in the angle between instruments (15.60°; 54%). Furthermore, the vertical vector of approach is improved by 28.97° yielding a caudal reach advantage of 2 cm. The area of surgical freedom afforded by 3 different approaches (endonasal, endonasal with an endoscope in CNT portal, and endonasal with an instrument in CNT portal) was compared at 4 points: the dural exit point of the 6th cranial nerve, jugular foramen, foramen lacerum, and petroclival fissure. The mean area of surgical freedom provided by both approaches incorporating the CNT corridor was superior to EEA alone at each of the surgical targets ( P =

    Matched MeSH terms: Nasal Cavity/anatomy & histology
  8. Variation of Ca, Sr, Ba and Mg in the otolith of mudskipper in west coast of Peninsular Malaysia
    Sarimin AS, Ghaffar MA, Mohamed CA
    Pak J Biol Sci, 2009 Feb 01;12(3):231-8.
    PMID: 19579951
    A study on elemental composition in the otolith of giant mudskipper, Periophthalmodon schlosseri, was done from June to October 2003. Specimens were obtained from the mangrove areas of Kuala Selangor, Sepang and Melaka in the west coast of Peninsular Malaysia. A total of 70 sagitta otoliths were analyzed to detect variation of Sr, Ba and Mg, replacing the natural chemical composition of the otolith, which is the calcium carbonate (CaCO3). The average ratio of Sr:Ca was 0.11 x 10(-4), Ba:Ca was 5.7 x 10(-3) and Mg:Ca was 0.2 x 10(-3). Strong correlation (R > 0.8) between fish body size and otolith weight ofmudskipper (p < 0.01) also found during this study.
    Matched MeSH terms: Fishes/anatomy & histology*
  9. Studies on plant regeneration and somaclonal variation in Saintpaulia ionantha Wendl. (African violet)
    Daud N, Taha RM, Hasbullah NA
    Pak J Biol Sci, 2008 May 01;11(9):1240-5.
    PMID: 18819532
    Efficient plant regeneration of Saintpaulia ionantha (African violet) has been obtained in the present study. MS medium supplemented with 1.0 mg L(-1) IAA and 2.0 mg L(-1) Zeatin resulted in 100% shoot regeneration and induced the highest number of shoots (average 15.0 +/- 0.8 shoots per explant) after being cultured for 8 weeks. The above hormone combination was optimum for shoot regeneration. Most of Saintpaulia ionantha plantlets derived from tissue culture system could be hardened and transferred to the greenhouse conditions with 84.0 +/- 1.6% success rate. However, regenerated plantlets of Saintpaulia ionantha (even after 12-months-old) failed to flower. Morphological characters of regenerated plantlets of Saintpaulia ionantha were observed and compared with in vivo (intact) plants. Regenerated plantlets showed some differences in morphological characters, such as height and leaf size, texture and colour, but the plantlets showed no variation in leaf arrangement and leaf margin. However, the morphological characters of the regenerated plantlets were found to be unstable.
    Matched MeSH terms: Angiosperms/anatomy & histology
  10. Mature female filaria, probably Brugia sp., from the conjunctiva of man in West Malaysia
    Dissanaike AS, Hock QC, Min TS
    Am J Trop Med Hyg, 1974 Nov;23(6):1023-6.
    PMID: 4429177
    Matched MeSH terms: Brugia/anatomy & histology
  11. An identification guide to the genera of aquatic larval Chironomidae (Diptera) of south-east Asia
    Cranston PS, Tang H
    Zootaxa, 2024 Aug 23;5497(2):151-193.
    PMID: 39647157 DOI: 10.11646/zootaxa.5497.2.1
    We provide illustrated dichotomous keys for the identification of final (4th) instar larvae of south-east Asian genera of Chironomidae (Diptera), predominantly from aquatic (freshwater and maritime) habitats. The region considered comprises oriental China, Burma, Thailand, Malaysia (west and east), Brunei, Singapore and Indonesia. Eight subfamilies are represented and phylogenetically validated tribes are keyed. Terminal taxa, listed in the sequence used in this guide, comprise 28 genera of Tanypodinae, 71 of Chironominae, 2 of Podonominae, 1 of Buchonomyiinae, 8 of Diamesinae, 2 of Protanypodinae, 5 of Prodiamesinae, 2 of Telmatogetoninae and 61 of Orthocladiinae. The morphology terminology is standard for larval Chironomidae to which users are referred. Illustrations of selected features are provided as photographs with important details labelled. Short summaries of ecology and concise details of selected species and regional / global distribution are provided in brackets under each entry. Some suspect new synonymy is alluded to, but will be addressed formally in more detail elsewhere.
    Matched MeSH terms: Animal Structures/anatomy & histology
  12. The taxonomy of Heteropanope indica De Man, 1887 from the Indian Ocean, with a note on Pilumnopeus pearsei (Rathbun, 1932) (Crustacea: Decapoda: Brachyura: Pilumnidae)
    Patel K, Trivedi J, Mitra S, Ng PKL
    Zootaxa, 2024 Apr 15;5437(3):384-396.
    PMID: 39646722 DOI: 10.11646/zootaxa.5437.3.4
    Benthopanope indica (De Man, 1887) was originally described from the Mergui Archipelago and has subsequently been reported from many Indo-West Pacific localities. The identity of this species is herein clarified. The re-examination of the type female, fresh specimens collected from Chilika Lake, Odisha State, India, as well as material from other locations, revealed that B. indica is not a Benthopanope species but should be assigned to Pilumnopeus instead. Pilumnopeus indicus comb. nov. is now restricted to the Indian Ocean and is reported from the western coast of Peninsular Malaysia for the first time. Heteropanope pearsei Rathbun, 1932, described from East Asia, previously synonymised under P. indicus by Sakai (1965), is here shown to be valid species of Pilumnopeus, and all previous records of "B. indica" from Japan, China, Taiwan, and Korea must be referred to this species. The two species can be differentiated by characters of the carapace, epistome, chelipeds and gonopods. Lectotypes are also designated for both species.
    Matched MeSH terms: Animal Structures/anatomy & histology
  13. A new species of Keratodegnathus Pace in Indonesia (Coleoptera, Staphylinidae)
    Jałoszyński P
    Zootaxa, 2024 Jun 19;5471(3):355-364.
    PMID: 39646309 DOI: 10.11646/zootaxa.5471.3.5
    The genus Keratodegnathus Pace includes two species known to occur in Malaysia (Sabah and Pahang). A third species, Keratodegnathus javanicus sp. n. is described, based on a female specimen from Indonesia (West Java Province). As the morphology of Keratodegnathus was previously inadequately described, a detailed scanning electron microscopy examination was carried out to characterize the new species. Keratodegnathus mirabilis Pace, 2014 was transferred by Assing to Orphnebius Motschulsky, resulting in a secondary homonymy with Orphnebius mirabilis (Bernhauer, 1911). Orphnebius mirabilides nom. n. is proposed as a replacement name for Orphnebius mirabilis (Pace).
    Matched MeSH terms: Animal Structures/anatomy & histology
  14. Three new species, one subspecies, and new records of the Oriental genus Loeblites Franz (Coleoptera: Staphylinidae: Scydmaeninae)
    Jałoszyński P
    Zootaxa, 2024 Jun 20;5471(4):422-432.
    PMID: 39646302 DOI: 10.11646/zootaxa.5471.4.2
    Loeblites is a small genus of Oriental Scydmaeninae, currently comprising only five species distributed in Thailand, Malaysia (Sabah), China (Yunnan), and the Philippines (Mindanao). Loeblites anaiensis sp. n. (Sumatra), L. umphangensis sp. n. (Thailand), L. pseudominor pseudominor sp. n. (Borneo, Thailand), and L. pseudominor sumatrensis subsp. n. (Sumatra) are described. New records for L. sabahensis Franz in Sarawak are reported, a species so far known to occur only in Sabah. Identification key to species of Loeblites is given.
    Matched MeSH terms: Animal Structures/anatomy & histology
  15. First record of the leafhopper genus Pedionis (Hemiptera: Cicadellidae: Eurymelinae: Macropsini) from Malaysia with description of a new species
    Wang D, Zhang Y
    Zootaxa, 2024 Dec 03;5543(2):237-246.
    PMID: 39646110 DOI: 10.11646/zootaxa.5543.2.5
    The genus Pedionis with its species Pedionis (Pedionis) rufoscutellata Huang & Viraktamath, 1993 is recorded for the first time from Malaysia. A new species Pedionis (Pedionis) spiculata sp. nov. is described and illustrated. An updated species checklist with distribution of the genus Pedionis is also provided.
    Matched MeSH terms: Animal Structures/anatomy & histology
  16. New and poorly known species of Bowie Jäger, 2022 (Araneae: Ctenidae) from Southeast Asia
    Omelko MM, Fomichev AA
    Zootaxa, 2024 Dec 04;5543(3):383-403.
    PMID: 39646099 DOI: 10.11646/zootaxa.5543.3.5
    Three new species, B. catopuma sp. nov. (♀) (Borneo, Malaysia), B. musang sp. nov. (♂♀) and B. tangalunga sp. nov. (♂) (both from Mindanao, Philippines), are described. Species of shakeit group are recorded outside of Borneo for the first time (Philippines). The females of Bowie neukoeln Jäger, 2022 and Bowie shakeit Jäger, 2022, and the male of B. hosei (F.O. Pickard-Cambridge, 1897) are redescribed. Detailed descriptions, digital photographs and a distributional map are provided.
    Matched MeSH terms: Animal Structures/anatomy & histology
  17. A new genus and two new species of gelechiid moths (Lepidoptera, Gelechiidae, Gelechiinae) from the East Malaysia with unusual male secondary characters
    Ponomarenko MG, Omelko МM
    Zootaxa, 2024 May 08;5447(4):573-582.
    PMID: 39646275 DOI: 10.11646/zootaxa.5447.4.8
    A new genus Esexalata gen. n. and two new species (E. beljaevi sp. n., type species, and E. natalyae sp. n.) are described and illustrated from East Malaysia. Males of the new taxa possess unique metathoracic and abdominal androconial structures and wing-like structures on the metascutum. The taxonomic position of the new genus within the family Gelechiidae is discussed.
    Matched MeSH terms: Animal Structures/anatomy & histology
  18. A review of the Oriental Copelatus latipes complex, with the description of two new species (Coleoptera: Dytiscidae: Copelatinae)
    Hájek J, Sheth SD
    Zootaxa, 2024 Jul 15;5481(1):119-130.
    PMID: 39646050 DOI: 10.11646/zootaxa.5481.1.7
    The Copelatus latipes species complex is introduced for Oriental species of Copelatus Erichson, 1832 belonging to the C. irinus group and characterised by the presence of processes on the ventral side of the median lobe of the aedeagus, forming a "beak-shaped" structure. The complex comprises six species, including two newly described taxa: Copelatus bezdeki Sheth, Ghate & Hájek, 2018 (India), C. brivioi Rocchi, 1976 (Bangladesh, India, Nepal), C. kopetzi sp. nov. (Nepal), C. lanxangensis sp. nov. (Laos), C. latipes Sharp, 1882 (Cambodia, Indonesia, Laos, Malaysia) and C. schereri Wewalka, 1981 (India, Sri Lanka). All species are diagnosed, and their habitus and male genitalia are illustrated.
    Matched MeSH terms: Animal Structures/anatomy & histology
  19. Five new species of Heteropoda Latreille, 1804 spiders (Araneae: Sparassidae) from Southeast Asia
    Korai SK, Jäger P
    Zootaxa, 2024 Jul 16;5481(2):241-259.
    PMID: 39646043 DOI: 10.11646/zootaxa.5481.2.4
    Five new species of Heteropoda (Araneae: Sparassidae, Heteropodinae) from Southeast Asia are described: H. acris spec. nov. (male, female; Vietnam), H. cuspidata spec. nov. (male; Malaysia), H. papilionacea spec. nov. (female; Malaysia), H. pilata spec. nov. (female; Thailand), and H. verticalis spec. nov. (male; Malaysia). The female of H. jasminae Jäger, 2008 is described for the first time (locality: Vietnam). All these new species are diagnosed, described, and illustrated. Additionally, a distribution map for all species is given.
    Matched MeSH terms: Animal Structures/anatomy & histology
  20. Three new species of the genus Viettherchnus Kirejtshuk, 1985 (Coleoptera: Nitidulidae: Nitidulinae: Cyllodini)
    Jelínek J, Hájek J
    Zootaxa, 2024 Oct 10;5519(4):590-600.
    PMID: 39645959 DOI: 10.11646/zootaxa.5519.4.7
    Three new species of the genus Viettherchnus Kirejtshuk, 1985 are described and illustrated: Viettherchnus apriculus sp. nov. (Malaysia), V. helferi sp. nov. (Indonesia: Kalimantan, Malaysia, Myanmar) and V. orszuliki sp. nov. (Nepal); the latter represents the first species of the genus known from the Himalayas. An identification key to all Viettherchnus species is provided.
    Matched MeSH terms: Animal Structures/anatomy & histology
Related Terms
Filters
Contact Us

Please provide feedback to Administrator (afdal@afpm.org.my)

External Links