J. Limnol., 2013; 72(s2): 290-312 BIOGEOGRAPHY - CRUSTACEA DOI: 10.4081/jlimnol.2013.s2.e14 COPEPODA An overview of the limnetic Cyclopidae (Crustacea, Copepoda) of the Philippines, with emphasis on Mesocyclops Rey Donne S. PAPA,1* Maria K. HOŁYŃSKA2 1Department of Biological Sciences and Research Center for the Natural and Applied Sciences, University of Santo Tomas, España Boulevard, 1008 Manila, Philippines; 2Museum and Institute of Zoology, Polish Academy of Sciences, Wilcza 64, 00-950 Warsaw, Poland *Corresponding author:
[email protected];
[email protected] ABSTRACT Approximately 120 (sub)species of Cyclopidae have been reported from South and Southeast (SE) Asia, where the Philippine archi- pelago – with 16 (including two endemic) taxa – is one of the least explored parts of the region. Our study, part of current efforts to assess freshwater biodiversity, was undertaken to update the diversity and geographic distribution of the cyclopid copepods living in the limnetic zone of the freshwater lakes in the Philippines. Examination of the samples from 22 lakes in five islands (Luzon, Mindoro, Cebu, Leyte and Mindanao) revealed a novel species from lake Siloton (Mindanao), Mesocyclops augusti n. sp. The new species can be distinguished from the congeners by the surface ornamentation of the hindgut, among others. Theonly same character state was found in a Mesocyclops from North Vietnam, which is provisionally identified as M. augusti n. sp., though the Vietnam and Mindanao specimens differ in a few (yet polymorphic in the close relatives) characters. Mesocyclops microlasius Kiefer, 1981 endemic to the Philippines is redescribed, based on females and males from lake Paoay (North Luzon).