Macrothrichidae Norman & Brady, 1867

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 : 636

Family Macrothrichidae Norman & Brady, 1867

Grimaldina brazzai Richard, 1892

Synonyms in Philippine literature: None.

Philippine records: Brehm, 1938; Mamaril, 1986, 2001.

General geographic distribution: The species was recorded in Mexico, Australia and Oriental Indomalaya.

Distribution in the Philippines. Luzon: Bulacan –Malolos; National Capital Region– Marikina and Pasig. Mindanao: Lanao del Sur –Lake Dangiagan, Lake Lanao, and Marawi. Remarks. The only known species of the genus Grimaldina . It is distributed within the tropics. Differentiated from other members of family Macrothricidae by having a wide oval body, a missive postabdomen and a head not separated from the carapace. It also has outgrowths in the ventral outline of its head near the base of the antennule ( Harding, 1957; Smirnov, 1992).

Guernella raphaelis Richard, 1892

Synonyms in Philippine literature: None.

Philippine records: Mamaril, 1986, 2001.

General geographic distribution: Widely distributed in the tropics as well as subtropical China. Afrotropical, Australasian, Neotropical, and Oriental Indomalaya.

Distribution in the Philippines. Luzon: Bulacan –Malolos; National Capital Region– Marikina, UP Diliman Campus, and Pasig. Cebu: Consolacion. Leyte: Tanauan. Negros: Negros Occidental – Bacolod. Mindanao: Lanao del Sur –Lake Lanao. Remarks. The only known species of the genus Guernella . Commonly found in vegetation of littoral zones of lakes and ponds ( Harding, 1957; Smirnov, 1992).

Macrothrix spinosa King, 1853

Synonyms in Philippine literature: None.

Philippine records: Brehm, 1938; Woltereck, 1941; Mamaril, 1986, 2001.

General geographic distribution: Afrotropical, Australasian, Neartic, Neotropical, Oriental Indomalaya, and Paleartic.

Distribution in the Philippines. Luzon: Bataan –Orani and Abucay; Batangas –Nasugbu and San Luis; Benguet – Baguio; Bulacan –Bustos Dam, and Malolos; Cagayan –Buguey; Camarines Sur – Naga; Ilocos Norte –San Nicolas; La Union –Aringay; Laguna –Calamba, IRRI compound, Los Banos, and Lumban; National Capital Region–La Mesa Dam, Marikina, and UP Diliman Campus; Manila-Laguna- Rizal: Laguna de Bay; Nueva Ecija –Cabanatuan and Bicos; Quezon –Pagbilao; Rizal –Binangonan; Tarlac –Bamban. Mindoro: Roxas. Mindanao: Cagayan de Oro – Cagayan de Oro; Lanao del Sur –Lake Lanao; Surigao del Sur –Surigao; South Cotabato –Guinang.

Remarks. A common species of Macrothrix in tropical and subtropical freshwaters. It has serrulations along the dorsal margin of its head and valves, but is best distinguished from the related, temperate-zone M. laticornis by the presence of serrated postabdomen ( Silva-Briano et al., 1999; Smirnov, 1992).

Macrothrix triserialis Brady, 1886

Synonyms in Philippine literature: None.

Philippine records: Brehm, 1938; Cheng & Clemente, 1954; Mamaril, 1986, 2001.

General geographic distribution: It has a pantropical and subtropical distribution.

Distribution in the Philippines. Luzon: Albay –Legaspi; Bulacan –Bustos Dam and Malolos; Laguna –Calamaba; National Capital Region– Marikina, UP Diliman Campus, Pasig, and San Juan River. Mindoro: Calapan.

Mindanao: Cagayan de Oro – Cagayan de Oro; Lanao del Sur –Lake Dangiagan; Misamis Oriental – Misamis Oriental. Remarks. Its taxonomy is quite complicated, forming a species group with a related temperate-zone taxon M. rosea ( M. rosea-triserialis species group) ( Smirnov, 1992; Dumont & Silva-Briano, 1998; Dumont et al., 2002).