Table of Contents
by Wilfred John E. Santiañez and John A. West
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 1-8, DOI:10.26757/pjsb2019a13001
Abstract (Primary Research Paper-Diversity and Distribution)
Date Posted (Final Published Version) : August 19,2019
Abstract
We describe herein the morpho-anatomy of the elusive brown alga Rosenvingea nhatrangensis (Scytosiphonaceae, Phaeophyceae) and add this species to the flora of both the Philippines and Malaysia. At present, only two Rosenvingea species (R. intricata and R. orientalis) have been reported from both localities. We also report on the occurrence of R. australis in central Philippines based on molecular phylogenetic data, thus extending its distribution to the northern Pacific. First time account of the morphology of R. australis sporophyte under culture conditions is also provided.
KEYWORDS: biodiversity, brown algae, Malaysia, Rosenvingea australis, Rosenvingea nhatrangensis, taxonomy
by Hector C. Miranda, Jr., Maria Josefa S. Veluz, and Robert S. Kennedy
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 9-12,
Tribute Article
Date Posted (Final Published Version) : September 19,2019
by Wilfredo B. Barrera Jr., Viverly Joy D. De Guzman, and Rose Mel R. Mergilla
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 13-27, DOI:10.26757/pjsb2019a13003
Abstract (Primary Research Paper-Taxonomy and Systematics)
Date Posted (Final Published Version) : February 25, 2020
Abstract
Populations of Begonia occur along the altitudinal gradients of Mt. Banahaw de Lucban. Begonia ramosii Merr. populations occur at lower altitudes and are gradually replaced by Begonia oxysperma A. DC. at higher elevations. This suggests the possibility of local adaptations and phenotype localization. Populations of Begonia were assessed and examined for phenotypic variability to provide information about habitat-driven traits and functional adaptations. Analysis of functional traits in 19 populations of B. oxysperma and 8 populations of B. ramosii using morpho-anatomical techniques confirmed these hypotheses. Phenolic vacuolar inclusions, anthocyanin pigmentation in young leaves and stems, presence of medullary vascular bundles and secondary growth, chlorophyll a concentration, trichome density in vegetative parts and stomatal density were observed to vary either intraspecifically or interspecifically which suggest functional adaptation. These preliminary results provide an interesting avenue for plant evolutionary and ecological studies using Begonia as a model plant species.
KEYWORDS: adaptation, environmental gradient, habitat-driven traits, Mt. Banahaw, variation
by Emmanuel S. Delloro Jr., Hiroyuki Motomura, and Ricardo P. Babaran
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 28-38, DOI:10.26757/pjsb2019a13004
Abstract (Primary Research Paper-Taxonomy and Systematics)
Date Posted (Final Published Version) : February 25, 2020
Abstract
Spotted stinger individuals, Inimicus sinensis, collected from Carles, Iloilo, Philippines exhibited previously-unreported sexual dimorphism. Thirty-three morphological measurements, including standard length, and fourteen meristic counts from 99 specimens (47 males and 52 females) were analyzed for sexual dimorphism. Most morphometric characters differed significantly between the sexes, whereas no differences were found in meristic counts. Dorsal and anal-fin and free pectoral-fin ray lengths were greater in male specimens. On the other hand, the head and body region were relatively larger in female specimens. Principal Component Analysis (PCA) extracted two principal components from significantly different parameters, which explained 62.29 % of the cumulative variances. Variations in the two major components resulted from: head width, upper jaw, lower jaw, snout, pre-dorsal, pre-anal-fin, and anal-fin base lengths in PC1 (45.65 %); and orbit diameter and anal-fin base length in PC2 (16.64 %). Additionally, a single anterolateral pore on the body and pores above the lateral-line are described, although no evidence of association with other organs was found.
KEYWORDS: morphology, meristics, factor analysis, sac
by Noel E. Lagunday and Victor B. Amoroso
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 39-45, DOI:10.26757/pjsb2019a13005
Abstract (Primary Research Paper-Taxonomy and Systematics)
Date Posted (Final Published Version) :March 1, 2020
Abstract
A new endemic species, Nepenthes cabanae, belonging to sect. Insignes is described from the Mt. Pantaron range of central Mindanao. The species is assessed as Critically Endangered. This discovery brings the number of Nepenthes species in this mountain range to eight. Mt. Pantaron is currently not a protected area, but the diversity of Nepenthes taxa suggests concerted efforts should be made to develop a conservation strategy to preserve and protect the area.
KEYWORDS: carnivorous plants, Nepenthes, Pantaron range, taxonomy, threatened species
by Fulgent P. Coritico, Victor B. Amoroso and Yea-Chen Liu
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 46-50, DOI:10.26757/pjsb2019a13006
Abstract (Primary Research Paper-Taxonomy and Systematics)
Date Posted (Final Published Version) : March 1, 2020
Abstract
Athyrium nakanoi Makino is a new fern species record for the Philippines, discovered in Mt. Dulang-Dulang, Kitanglad Range, Mindanao, Philippines extending its original distribution from India, Nepal, Bhutan, China, Taiwan and Japan, Indonesia and Malaysia. Diagnostic description of the species is provided together with its distribution, conservation status and a dichotomous key to the Malesian Athyrium Sect. Polystichoides.
KEYWORDS: Mindanao, Athyriaceae, ferns, pteridophytes
by Reagan Joseph T. Villanueva and Rory A. Dow
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 51-70, DOI:10.26757/pjsb2019a13007
Abstract (Primary Research Paper-Taxonomy and Systematics)
Date Posted (Final Published Version) : March 30, 2020
Abstract
The species formerly assigned to the genus Amphicnemis Selys, 1863 in the Philippines are reviewed. The present paper is the third of a series and deals with the species transferred to the genus Pericnemis Hagen in Selys, 1863. Specimens used in the study are all deposited in museums collections. The bonita- and incallida-groups of Pericnemis from the Philippines are characterized. A key to species groups within Pericnemis is given, and also a key to the males of the bonita- and incallida-groups. The bonita-group includes five species: P. bonita Needham & Gyger, 1939, P. flavicornis Needham & Gyger, 1939, P. bisaya sp. nov., P. gili sp. nov. and P. muragbonita sp. nov. The incallida-group includes two species: P. incallida Needham & Gyger, 1939 and P. yakal sp. nov. Descriptions and illustrations are provided of both sexes of all species.
KEYWORDS: Zygoptera, biodiversity, taxonomy, Philippines
LSID: urn:lsid:zoobank.org:pub:1A9E97EE-601E-42A2-A36A-06F379D99BBA
by Jonathan Jaime G. Guerrero, Teresita U. Dalisay, Ireneo B. Pangga, and Nolissa D. Organo
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 71-84, DOI:10.26757/pjsb2019a13008
Abstract (Primary Research Paper-Diversity and Distribution)
Date Posted (Final Published Version) : April 13, 2020
Abstract
This research was conducted to isolate culturable soil-borne fungi from Lipa clay loam soil and identify the types of siderophores they produce. The frequency of fungal isolates was likewise compared across the soil strata. Soil samples were plated on Rose Bengal Agar (RBA) and incubated for five days. Morpho-culturally unique isolates were transferred in Potato Dextrose Agar (PDA) slants and identified using taxonomic keys and by ITS sequencing. Siderophores of each species were then characterized through colorimetric methods. Twenty-nine species of fungi were identified. Six isolates were Basidiomycetes, 1 Zygomycetes and 22 Ascomycetes. Among ascomycetes, two were teleomorphs: Chaetomium globosum Kunze and Emericella nidulans (Eidam) Vuillemin. Isolates were then characterized in terms of their ability to produce siderophores. Majority produced hydroxamate type of siderophores while only Aspergillus tamarii Kita produced all three types of siderophores. Six other species failed to produce any of the three types. Isolates may further be studied for their metal remediating capacity and other biological activities.
KEYWORDS: Chaetomium globosum, Emericella nidulans, Lipa clay loam soil, siderophores, soil-borne fungi
by Mark Stephen B. Real and Domingo A. Madulid
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 85-96, DOI:10.26757/pjsb2019a13009
Abstract (Primary Research Paper-Taxonomy and Systematics)
Date Posted (Final Published Version) : April 13, 2020
Abstract
The taxonomy of the Philippine Rubus species was studied through a phenetic analysis of the morphological data from preserved specimens. After recording the character states, the data were analyzed using cluster analysis and PCA, and the resulting analysis allowed the delimitation of morphologically similar Rubus species. Specimens of the Rubus genus collected in the country were separated into two clusters distinguished by leaf structure. Specimens of the same species are often found in multiple sub-clusters, which suggests the high degree of variation within a species. PCA of morphological data from Rubus species show that leaf and floral characters, which include the maximum number of lobes, pedicel pubescence, outside pubescence of the hypanthium, apex of the simple leaf blade, and the apical process of the sepals, explain the variation in Rubus species in the Philippines.
KEYWORDS: cluster analysis, brambles, Rosaceae, PCA
by Kristine O. Abenis and Ireneo L. Lit, Jr.
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 97-104, DOI:10.26757/pjsb2019a13010
Abstract (Primary Research Paper-Taxonomy and Systematics)
Date Posted (Final Published Version) : May 11, 2020
urn:lsid:zoobank.org:pub:CB533589-F3EC-412A-BD45-E352B25F4484
Abstract
Two species, Chalybion clarebaltazarae sp. nov., and Chalybion stephenreyesi sp. nov., are described as new to science on the basis of their placoid pattern and shape of genitalia. Chalybion japonicum (Griboldo, 1882) is also hereby reported as a new record for the Philippines.
KEYWORDS: Sceliphrini, Chalybion clarebaltazarae, Chalybion stephenreyesi, Chalybion japonicum
by Jhon Michael C. Castro , Jon Carlo B. Gonzales, and Ma. Vivian C. Camacho
Philippine Journal of Systematic Biology, Volume 13, Issue 1, 2019, Pages 105-111, DOI:10.26757/pjsb2019a13011
Abstract (Short Communication-Taxonomy and Systematics)
Date Posted (Final Published Version) : May 11, 2020
Special Article for the 2nd Philippine Symposium for Freshwater Biodiversity and Ecosystems
Abstract
Chitala ornata (J.E. Gray) (Osteoglossiformes: Notopteridae) has since established abundant and nuisance populations in Laguna de Bay. A fundamental prerequisite for the development of management strategies for invasive species like C. ornata is a full understanding of its life history characteristics including sexual dimorphism. In the present study, we examined the sexual dimorphism of C. ornata. Sexes of C. ornata can be distinguished through the examination of its genital papilla wherein females show distinct morphological adaptions for effective oviposition on a spawning substrate. Comparison of means and multivariate analysis of several morphometric characters showed that sexual size dimorphism in C. ornata is female-biased which is mainly attributed to the disparity of resource expenditure between sexes for reproduction and size-dependent advantages of females in the production of more progenies with better chances of survival.
KEYWORDS: genital papilla, invasive species, Principal Component Analysis, sexual size dimorphism, teleost
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