MyMedR

A new species of Amalothrips Ananthakhrishnan from Malaysia, with first description of male

Ng YF

Zootaxa, 2015;4032(2):246-50.

PMID: 26624359 DOI: 10.11646/zootaxa.4032.2.13

Amalothrips noorazlani sp. n. is described from Malaysia based on both sexes, and a key is provided to the species of this genus. This is the first record of Amalothrips species outside India, and the first description of a male Amalothrips. The male has a pair of drepanae, the tergal posteromargin bears a toothed craspedum, but there are no sternal pore plates.

Organothrips stongensis sp. n. and Watanabeothrips yasuakii Okajima: new records from Peninsular Malaysia of Thysanoptera: Thripidae

Ng YF

Zootaxa, 2017 Oct 31;4341(2):283-286.

PMID: 29245693 DOI: 10.11646/zootaxa.4341.2.10

Organothrips stongensis sp. n. is described from Malaysia based on two males. These are sharply bicolored in contrast to other males in this genus, and a key is provided to males of the four known species of this genus. Organothrips was not previously known in Malaysia. Watanabeothrips yasuakii Okajima is also a first record from Malaysia, and differences between these females and the holotype decription are discussed.

Genera of the Scirtothrips genus-group (Thysanoptera, Thripidae) with a new species of Siamothrips from Malaysia

Ng YF, Mound LA

Zootaxa, 2015;4021(2):387-94.

PMID: 26624136 DOI: 10.11646/zootaxa.4021.2.9

The Scirtothrips genus-group is here considered to comprise 11 genera, and an identification key to these is presented. These genera are Ajothrips Bhatti, Anascirtothrips Bhatti, Biltothrips Bhatti, Cercyothrips Morgan, Drepanothrips Uzel, Ephedrothrips zur Strassen, Kenyattathrips Mound, Parascirtothrips Masumoto & Okajima, Scirtidothrips Hood, Scirtothrips Shull and Siamothrips Okajima. One genus, Sericopsothrips Hood, is considered a new synonym of Scirtothrips, with the only species now referred to as Scirtothrips palloris (Hood) comb.n. A second species in the genus Siamothrips is described from Malaysia as Siamothrips initium sp.n.

Species of Thripinae (Thysanoptera) from bamboo in Malaysia, with one new species and six new records

Ng YF, Mound LA

Zootaxa, 2015;3918(1):492-502.

PMID: 25781107 DOI: 10.11646/zootaxa.3918.4.2

Nine species of Thripinae that inhabit bamboo are recorded from Malaysia. Clypeothrips idrisi sp.n. is described as a second species in the genus, and Trichromothrips bruncurrum Reyes is considered a syn.n. of Neocorynothrips asiaticus Ramakrishna & Margabandhu. Six species are newly recorded from Malaysia: N. asiaticus, Okajimaella tubercula, Simulothrips banpoti, Stenchaetothrips bambusicola, S. bambusae and S. spinalis. Seven species of Stenchaetothrips are now known from Malaysia. Illustrations and descriptions of each species are provided.

Fulltext The economically important thrips from Malaysia, with a key to species (Thysanoptera, Thripinae)

Ng YF, Zaimi JS

Zookeys, 2018.

PMID: 30613175 DOI: 10.3897/zookeys.810.28457

An illustrated key is provided to the economically important Thripinae (Thysanoptera) of Malaysia, together with a checklist and information on hosts and distributions. Information about the diversity and pest status for these Thripinae is provided, together with the prominent character states that are useful for recognising each species.

Studies on the genus Lefroyothrips, with new records from Malaysia, New Caledonia and a new species from Australia (Thysanoptera, Thripidae)

Mound LA, Ng YF

Zootaxa, 2021 Feb 16;4927(4):zootaxa.4927.4.7.

PMID: 33756693 DOI: 10.11646/zootaxa.4927.4.7

Six species are recognised in the genus Lefroyothrips, including one new species from Australia. The metascutal chaetotaxy of two of these species is unique amongst Thripidae. New distribution records given here indicate that four of the species are widely distributed: L. pictus across tropical Africa, L. lefroyi from northern India to Taiwan, L. fasciatus from Malaysia to northern Australia and New Guinea, and L. varatharajani from southern India to New Caledonia and northern Australia. An illustrated key is provided to the six known species in this genus.

Merothripidae from Malaysia: Merothrips with one new species and two new species records

Ng YF, Mound LA

Zootaxa, 2018 Apr 11;4407(3):447-450.

PMID: 29690190 DOI: 10.11646/zootaxa.4407.3.12

The family Merothripidae is recorded for the first time from Malaysia. Three species of Merothrips, the largest genus in the family, are recorded here, with the description of Merothrips yii sp.n.

Autapomorphies in the generic classification of Plectrothripini (Thysanoptera, Phlaeothripinae), with a new genus and a new record from Malaysia

Mound LA, Ng YF

Zootaxa, 2018 Mar 28;4402(2):390-394.

PMID: 29690274 DOI: 10.11646/zootaxa.4402.2.10

Bangithrips mei gen. et sp. n. is described from Peninsular Malaysia. The significance is discussed of outstanding structural autapomorphies that are commonly used in classifications of Thysanoptera. Argyrothrips ommatos described recently from northern Australia is recorded from Malaysia.

Two new species of Scirtothrips genus-group (Thripidae) of Northern Peninsular Malaysia

Ng YF, Mound LA

Zootaxa, 2016 Mar 07;4088(1):141-5.

PMID: 27394331 DOI: 10.11646/zootaxa.4088.1.8

The survey of Thysanoptera in peninsular Malaysia has been concentrated largely in areas growing crops and flowers around Kuala Lumpur, and the Cameron Highlands, and there are few records of these insects from native forests particularly in the northern part of the country. The two species described here were collected during a recent visit to Belum-Temengor Forest Complex, in Perak State, part of the second largest forested area on the peninsular, and connected to the Bang Lang National Park, in Yala Province, Thailand. This forest has been well known as home to a number of endangered animals, including Malayan tigers and Asian elephants, as well as remarkable plant species such as Rafflesia with the world's largest flowers (Abdullah et al. 2011). Despite this, forest areas are facing a major challenge from the insatiable demand for timber, palm oil and minerals, with an 80% increase in deforestation rate in Malaysia between 1990 and 2005 (FAO 2010). Forested land in peninsular Malaysia has been estimated at 5.88 million-ha or 44% of total area, but the coverage of reserved virgin forest is about 0.40 % or 23,002-ha (Dahlan 2008).

The genus Scirtothrips (Thysanoptera: Thripidae) in Malaysia, with four new species and comments on Biltothrips, a related genus

Ng YF, Mound LA, Azidah AA

Zootaxa, 2014;3856(2):253-66.

PMID: 25284657 DOI: 10.11646/zootaxa.3856.2.6

Species of the genus Scirtothrips are studied from Malaysia for the first time. Six species of this genus are here recorded from Malaysia: S. dobroskyi is newly recorded, and four new species: S. lantanae sp.n., S. lixinae sp.n., S. hitam sp.n. and S. malayensis sp.n. are described together with an illustrated identification key. Relationships were examined between S. dorsalis and the closely related S. hitam sp.n., based on the mitochondrial gene COI, and a redescription of the widespread pest species, dorsalis, is provided. Biltothrips minutus (Bhatti) is reported from Malaysia for the first time, and illustrations provided to distinguish this genus from Scirtothrips.

A new genus of Thripinae (Thysanoptera, Thripidae) collected from Pandanus in Japan, Malaysia and Australia, with three new species

Masumoto M, Ng YF, Okajima S

Zootaxa, 2013;3709:543-54.

PMID: 26240928

Pandanothrips gen. n. is described, with three new species inhabiting Pandanus: P. ryukyuensis sp. n. from Japan, P. wangi sp. n. from Malaysia, and P. hallingi sp. n. from Australia. This new genus shows no relationship to Projectothrips Moulton, the only other Thripinae genus known to be associated with Pandanus. Pandanothrips is superficially similar to Danothrips Bhatti, a genus of leaf feeding thrips. The morphological relationships among these genera are discussed, and an illustrated key to the species of Pandanothrips is provided.

Re-description of Coeliccia erici Laidlaw, and the description of Coeliccia sameerae sp. nov. from Peninsular Malaysia (Odonata: Zygoptera: Platycnemididae)

Dow RA, Choong CY, Ng YF

Zootaxa, 2018 Apr 23;4413(2):351-367.

PMID: 29690113 DOI: 10.11646/zootaxa.4413.2.7

Coeliccia erici Laidlaw, 1917 is re-described and illustrated for both sexes; its taxonomic history and the confusion surrounding it is discussed. Coeliccia kimurai Asahina, 1990 is shown to be a junior synonym of C. erici. Coelicca sameerae sp. nov. (holotype ♂, small stream near Sungai Lasir, Tasik Kenyir, Terengganu, Malaysia, deposited in the Natural History Museum, London) is described from both sexes from Peninsular Malaysia; this species had been confused with C. erici until now. A remark on the status of Coeliccia simillima Laidlaw, 1917 is made.

A new species of Tenothrips pollinating Dipterocarpus sublamellatus in Malaysia

Ng YF, Ain N, Lau KH

Zootaxa, 2019 Nov 11;4695(4):zootaxa.4695.4.9.

PMID: 31719347 DOI: 10.11646/zootaxa.4695.4.9

Tenothrips keruing sp. n. is described from Malaysia. This new species was taken from the flowers of Dipterocarpus sublamellatus (local name Keruing kerut) during the recent mass-flowering. The male of this species has a pair of stout setae on abdominal tergite IX, and there are no sternal pore plates. A key to species of Tenothrips from Indomalaysia is provided.

Drepanosticta rahmani sp. nov., from Kedah, Malaysia (Odonata: Zygoptera: Platystictidae)

Dow RA, Choong CY, Ng YF

Zootaxa, 2017 Oct 24;4338(1):44-50.

PMID: 29245726 DOI: 10.11646/zootaxa.4338.1.2

Drepanosticta rahmani sp. nov. (holotype ♂, steep tributary to stream in hills between Baling and Gulai, north west Kedah, Malaysia, 15 xi 2016, leg. R.A. Dow, to be deposited in the Natural History Museum, London) is described from both sexes.

A new genus and species of Scirtothrips genus-group (Thysanoptera, Thripidae), with two new species of Scirtothrips, from Dipterocarp Forest canopy in Malaysia

Ng YF, Ain N, Rafti NS, Lau KH

Zootaxa, 2023 Jun 23;5306(5):586-594.

PMID: 37518665 DOI: 10.11646/zootaxa.5306.5.6

A new genus and three new species are described from the canopy of Dipterocarp forest in Pasoh Forest Research in Malaysia: Daunothrips gen. n., D. striatus sp. n., Scirtothrips convexum sp. n. and Scirtothrips longifacies sp. n. The morphological characters of these new members of the Scirtothrips genus-group are discussed and illustrated.

Fulltext Molecular phylogeny of Orthetrum dragonflies reveals cryptic species of Orthetrum pruinosum

Yong HS, Lim PE, Tan J, Ng YF, Eamsobhana P, Suana IW

Sci Rep, 2014 Jul 03;4:5553.

PMID: 24989852 DOI: 10.1038/srep05553

Dragonflies of the genus Orthetrum are members of the suborder Anisoptera, family Libellulidae. There are species pairs whose members are not easily separated from each other by morphological characters. In the present study, the DNA nucleotide sequences of mitochondrial and nuclear genes were employed to elucidate the phylogeny and systematics of Orthetrum dragonflies. Phylogenetic analyses could not resolve the various subfamilies of the family Libellulidae unequivocally. The nuclear 28S rRNA gene is highly conserved and could not resolve congeneric species of Orthetrum. Individual mitochondrial genes (COI, COII, and 16S rRNA) and combination of these genes as well as the nuclear ITS1&2 genes clearly differentiate morphologically similar species, such as the reddish species pairs O. chrysis and O. testaceum, and the bluish-coloured species O. glaucum and O. luzonicum. This study also reveals distinct genetic lineages between O. pruinosum schneideri (occurring in Malaysia) and O. pruinosum neglectum (occurring north of Peninsular Malaysia from India to Japan), indicating these taxa are cryptic species.

Collagenofibrotic glomerulopathy- report of a rare renal disease with serial biopsies

Ng YF, Chow CY, Yang WS, Lye WC, Loh HL

Malays J Pathol, 2020 Apr;42(1):131-135.

PMID: 32342943

INTRODUCTION: Collagenofibrotic glomerulopathy or collagen type-III glomerulopathy is a rare glomerular disease characterised by the deposition of type III collagen fibres in the subendothelial space and mesangium of the glomerulus.

CASE REPORT: Here, we present a case of collagenofibrotic glomerulopathy in a 49-year-old Indian female, the first to be reported from Singapore. Renal biopsy showed PAS (periodic acid-Schiff), silver and Congo red negative, amorphous extracellular material that expanded mesangial and subendothelial regions. Such materials were strongly positive for anti-collagen III immunofluorescent staining. Under electron microscopy, the mesangial and some subendothelial regions were greatly expanded by abundant collagen fibres which were different from normal collagen III fibres in both appearance and periodicity.

DISCUSSION: The availability of past renal biopsies for reference offered insight into disease progression. From the initial diagnosis of focal segmental glomerulosclerosis to eventually collagenofibrotic glomerulopathy over a time span of more than 10 years, this case highlights the gradual accumulation of collagen fibres in the glomeruli before classical features are apparent. It also emphasises the importance of electron microscopy in the diagnosis of this disease.

Management of rheumatoid arthritis in clinical practice using treat-to-target strategy: Where do we stand in the multi-ethnic Malaysia population?

Tan BE, Lim AL, Kan SL, Lim CH, Ng YF, Tng SLC, et al.

Rheumatol Int, 2017 Jun;37(6):905-913.

PMID: 28389855 DOI: 10.1007/s00296-017-3705-6

To evaluate the achievement of treat-to-target (T2T) strategy in rheumatoid arthritis (RA) and identify factors associated with failed treatment target in a public rheumatology center. A cross-sectional study was conducted from June 2015 to February 2016. RA patients with disease duration greater than 2 years and under T2T for over a year were invited to the study. Demographic, clinical data, disease activity score of 28 joints (DAS28), and clinical disease activity index (CDAI) were collected in a single routine clinic visit. Treatment target was defined as DAS28 <3.2 or CDAI ≤10. Retrospective chart review was performed to determine reasons of failed treatment target. A total of 371 patients were recruited and 87.1% were female. Mean age and duration of RA were 53.5 years (SD 10.3) and 9.1 years (SD 6.6), respectively. Ethnic distribution was 49% Chinese, 27% Malay, and 24% Indian. T2T was achieved in 81.7% of the cohort. Non-Chinese ethnicity, positive rheumatoid factor, and treatment with three disease modifying anti-rheumatic drugs (DMARDs) were associated with failed treatment target. After controlling for covariates, Malay ethnicity (OR 2.96; 95% CI 1.47-5.96) and treatment with three DMARDs (OR 2.14; 95% CI 1.06-4.35) were associated with failed treatment target. There was no association between age, gender, duration of RA, BMI, smoking status, anti-citrulinated cyclic peptide, and achievement of T2T. The most common reasons of failed treatment target were inability to escalate DMARDs due to side effects (18.8%), lack of biologics fund (15.6%), and persistent disease despite optimum treatment (14.1%). T2T was successfully implemented. Malay patients need aggressive treatment adaptation to achieve optimal outcome.

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