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

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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

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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

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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

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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

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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

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LSID: urn:lsid:zoobank.org:pub:1A9E97EE-601E-42A2-A36A-06F379D99BBA