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Historical trends among cestode research of vertebrates in the Philippines

Review Paper (Taxonomy and Systematics)

Date Posted (Final Published Version) : September 10, 2018

by Vanessa V. Martinez and Jonathan Carlo A. Briones

Abstract

The study of cestodology has provided an increased understanding of global parasite epidemiology and has contributed to the decrease of human health risks caused by parasite infections. Research trends over past decades have proven that more species have yet to be discovered. An analysis of the trend of cestode studies among vertebrates in the Philippines is hereby presented in aspects of (1) peer-reviewed readership, (2) host taxa studied, (3) geographical distribution, and (3) target parasite species of interest. A survey of 182 publications in primary scientific and grey literature from 1904 to 2017 revealed that most studies were published locally. Likewise, a number of papers favored mammals, particularly humans, as the preferred vertebrate host of study. Looking into geographical distribution, a great number of publications focused on Luzon Island and was concentrated in Manila. Cestode species reported so far in the country belong to order Cyclophyllidea, with Taenia solium and T. saginata as the preferred species to be investigated. Looking into these, we suggest that a shift into the application of molecular systematics and biotechnology would further develop Philippine cestode research, given that the historical trend has focused on parasite discovery, identity, and classification. May this paper be a call to further fill the gaps in what is known about cestodes and other parasites in the Philippines, given the country’s potential for further discoveries.

KEYWORDS: Cyclophyllidea, parasite, Platyhelminthes, Taenia, tapeworm.

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New record of Phyllodiaptomus (Ctenodiaptomus) praedictus sulawensis Alekseev & Vaillant, 2013 (Hexanauplia, Copepoda, Calanoida, Diaptomidae) in the Philippines (Luzon Island)

Primary Research Paper (Taxonomy and Systematics)

Date Posted (Final Published Version) : October 16, 2018

by Shea Kathleen P. Guinto, Justine Val Jade B. Lacaba, John Kenneth V. Cuballes, Aezrile A. Igancio, Eric Zeus C. Rizo, Henri J. Dumont, Bo-Ping Han & Rey Donne S. Papa

Abstract

A study originally intended to update the taxonomy and distribution of calanoid copepods in selected freshwater ecosystems of Central Luzon has led to the discovery of a new record of Phyllodiaptomus Kiefer, 1936 in Candaba Swamp, Pampanga. Since 1979, the only calanoid copepods recorded from this area included Filipinodiaptomus insulanus (Wright S., 1928) and Tropodiaptomus australis Kiefer, 1936. Later studies on calanoid copepods in the region have since been non-existent. Analyses of pertinent key morphological characters revealed that the specimens at hand belonged to Phyllodiaptomus (Ctenodiaptomus) praedictus sulawensis Alekseev & Vaillant, 2013, a freshwater diaptomid calanoid copepod subspecies discovered and known to be endemic only in Indonesia. Provided in this paper are baseline information on the morphological characters of the Philippine members of the subspecies accompanied by line drawings as well as a comparison between the recorded morphological data presented by Alekseev, Haffner, Vaillant & Yusoff (2013) and the current dataset to support the identification of the specimen. The discovery of P. (C.) praedictus sulawensis in the Philippines, which was thought to be endemic in Indonesia, presents a new record of this species in the country and the first such record outside of its country of origin.

KEYWORDS: Candaba Swamp, Copepod, Indonesia, Inland Waters, Limnology, Thailand 

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Philippine Journal of Systematic Biology Print ISSN: 1908-6865; Online ISSN: 2508-034