Maxillopoda Dahl, 1956

Lopez, Mark Louie D., Pascual, Jhaydee Ann F., Dela Paz, Erica Silk P., Rizo, Eric Zeus C., Tordesillas, Dino T., Guinto, Shea Kathleen, Han, Boping, Dumont, Henri J., Mamaril, Augustus C., Sr & Papa, Rey Donne S., 2017, Annot ated checklist and insular distribution of f reshwater microcrustaceans (Copepoda: Calanoida & Cyclopoida; Cladocera: Anomopoda & Ctenopoda) in the Philippines, Raffles Bulletin of Zoology 65, pp. 623-654 : 624-626

Class Maxillopoda Dahl, 1956 Subclass Copepoda Milne-Edwards, 1840

Order Calanoida Sars, 1903 Family Diaptomidae Baird, 1850

Arctodiaptomus dorsalis ( Marsh, 1907)

Synonyms in Philippine literature: None.

Philippine records: Tuyor & Baay, 2001; Papa et al., 2012a, 2012b; Metillo et al., 2014; and Rizo et al., 2015.

General geographic distribution: Nearctic and Central America. Ranges from Gulf of Mexico and the Caribbean Sea regions, and from the southern United States to Central America and northern South America.

Distribution in the Philippines. Luzon: Albay –Lago del Ray; Batangas –Lake Taal; Camarines Sur –Lake Buhi, Lake Bato, Lake Baao, Bicol River (Naga), and Camarines Sur sports complex; Laguna –Lake Caliraya, Lake Lumot– Mahipon, Lake Tadlak, Lake Sampaloc, Lake Bunot, Lake Calibato, Lake Mohicap, Lake Palakpakin, Lake Pandin, and Lake Yambo; Manila-Laguna-Rizal: Laguna de Bay. Mindoro: Lake Naujan. Mindanao: Lanao del Sur –Lake Lanao; South Cotabato –Lake Sebu and Lake Siloton.

Remarks. Arctodiaptomus dorsalis is a neotropical species originally described from lakes near New Orleans, Louisiana, U.S.A. In the Philippines, Tuyor & Baay (2001) noted its occurrence in lakes Laguna de Bay, Mainit, and Sebu. The Laguna Lake Development Authority 1996–2005 report for seven lakes of San Pablo, Laguna noted the presence of A. dorsalis in these lakes. Papa et al. (2012a) first reported the biological invasion of this species in 18 out of 27 lakes surveyed in the Philippines (Fig. 2). The spread to new localities has been attributed to aquaculture, and this species was also found to benefit from eutrophic environments ( Reid, 2007).

Filipinodiaptomus vexillifer ( Brehm, 1933)

Synonyms in Philippine literature: Diaptomus vexillifer Brehm, 1933 .

Philippine record: Brehm, 1933; Petersen & Carlos, 1984. General geographic distribution: So far known only from Lake Danao, Philippines.

Distribution in the Philippines. Leyte: Lake Danao.

Remarks. Endemic. The earliest and only taxonomic reference stating the presence of D. vexillifer in Lake Danao was written by Brehm (1933). Papa et al. (2012a) pointed out its unresolved taxonomic status. Recent morphological and molecular work confirmed it as a Filipinodiaptomus Lai et al. (1979) (Li et al., in press).

Filipinodiaptomus insulanus ( Wright, 1928)

Synonyms in Philippine literature: Diaptomus insulanus Wright, 1928 ; Diaptomus sensibilis Kiefer, 1928a .

Philippine records: Wright, 1928; Mamaril & Fernando, 1978; Petersen & Carlos, 1984; Mamaril, 1986, 2001; Tuyor & Baay, 2001; Aquino et al., 2008; and Papa et al., 2012a. General geographic distribution: Philippines (Luzon and Visayan Islands).

Distribution in the Philippines. Luzon: Ilocos Norte – Lake Paoay; National Capital Region–La Mesa Dam and Marikina; Manila-Laguna-Rizal: Laguna de Bay; Nueva

Ecija–Pantabangan Dam; Tarlac – Concepcion. Leyte: Lake Danao .

Remarks. Endemic. Recent sampling collections ( Papa et al., 2012b) only observed the species in Lake Paoay, whereas before it was noted in Laguna de Bay in 1978 and 2001 ( Mamaril & Fernando, 1978; Mamaril, 2001) and in Lake Danao by Tuyor & Baay (2001).

Mongolodiaptomus birulai ( Rylov, 1922)

Synonyms in Philippine literature: None.

Philippine records: Lai et al., 1979; Petersen & Carlos, 1984; Mamaril, 1986, 2001; and Papa et al., 2012a.

General geographic distribution: Oriental Indomalaya and Palaearctic.

Distribution in the Philippines. Luzon: Ilocos Norte –Lake Paoay and San Nicolas; Benguet – Baguio City.

Remarks. Distribution in the Philippines is limited to northern Luzon. The species was first reported by Mamaril & Fernando (1978) and Lai et al. (1979) who examined samples collected by D.G. Frey from Baguio City. It was also recently recorded in Lake Paoay ( Aquino et al., 2008).

Tropodiaptomus australis Kiefer, 1936

Synonyms in Philippine literature: None.

Philippine records: Brehm, 1942; Lai et al., 1979; Kiefer, 1982; Petersen & Carlos, 1984; Mamaril, 1986, 2001.

General geographic distribution: Australasian.

Distribution in the Philippines. Luzon: Cagayan –Buguey;

Ilocos Norte – Lake Paoay ; National Capital Region – La Mesa Dam , Marikina, UP Campus; and Laguna –Calamba.

Remarks. This species was not found in samples collected in 2008–2015. Lake Paoay, where the species was previously collected from is now dominated by M. birulai and A. dorsalis ( Papa et al., 2012a) . Current occurrence of the species in Philippine freshwaters remains unknown.

Tropodiaptomus gigantoviger Brehm, 1933

Synonyms in Philippine literature: None.

Philippine records: Brehm, 1942; Lai et al., 1979; Kiefer, 1982; Petersen & Carlos, 1984; Mamaril, 1986, 2001.

General geographic distribution: Philippines (Luzon and Mindanao Islands).

Distribution in the Philippines. Luzon: Manila-Laguna- Rizal: Laguna de Bay. Mindanao: Lanao del Sur –Lake Lanao and Marawi City.

Remarks. Endemic. This species was not found in samples collected in 2008–2015. Samples from Laguna de Bay and Lake Lanao, where the species was previously recorded, are now dominated by A. dorsalis ( Papa et al., 2012a; Metillo et al., 2015). Current fate of the species in Philippine freshwaters is unknown.

Tropodiaptomus lanaonus Kiefer 1982

Synonyms in Philippine literature: None.

Philippine records: Kiefer, 1982.

General geographic distribution: Philippines (Mindanao Island).

Distribution in the Philippines. Mindanao: Lanao del Sur –Lake Lanao.

Remarks. Endemic. This species was not found in samples collected in 2008–2015. Current fate of the species in Philippine freshwaters is unknown.

Tropodiaptomus vicinus ( Kiefer, 1930)

Synonyms in Philippine literature: Tropodiaptomus malaicus prasinus Brehm, 1933 ( Table 3).

Philippine records: Lai et al., 1979; Kiefer, 1982; Petersen & Carlos, 1984; Mamaril, 1986, 2001.

General geographic distribution: Oriental Indomalaya.

Distribution in the Philippines. Luzon: Batangas –Lake Taal; Camarines Sur –Lake Buhi. Mindanao: Lanao del Sur –Lake Lanao.

Remarks. This species was not found in samples collected in 2008–2015. Lake Lanao, Lake Taal, and Lake Buhi, where the species was previously recorded, are now dominated by A. dorsalis ( Papa et al., 2012a; Metillo et al., 2014). Current occurrence of the species in Philippine freshwaters uncertain.