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Hendrik Freitag        
Ateneo de Manila University
Quezon City, Philippines
9 articles by this author
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Research Article
Ancyronyx lianlabangorum sp. nov., a new spider riffle beetle from Sarawak, and new distribution records for A. pulcherrimus Kodada, Jäch & Čiampor based on DNA barcodes (Coleoptera, Elmidae)
    Ján Kodada, Manfred A. Jäch,     Hendrik Freitag,     Zuzana Čiamporová-Zaťovičová,     Katarína Goffová,     Dávid Selnekovič,     Fedor Čiampor Jr
10.3897/zookeys.1003.55541
 14-12-2020
 Unique: 2323 | Total: 3363  | Access Period:
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 31-55
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Research Article
Description of Neoperla mindoroensis sp. nov., the first record of a stonefly from Mindoro, Philippines (Plecoptera, Perlidae), and identification of its life stages using COI barcodes
    Arthien Lovell Pelingen,     Hendrik Freitag
10.3897/zookeys.954.53746
 29-07-2020
 Unique: 2593 | Total: 3579  | Access Period:
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 47-63
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Research Article
Ancyronyx clisteri , a new spider riffle beetle species from Borneo, redescription of A. sarawacensis Jäch including a description of the larva and new distribution data for A. procerus Jäch using DNA barcodes (Coleoptera, Elmidae)
    Ján Kodada, Manfred A. Jäch,     Hendrik Freitag,     Zuzana Čiamporová-Zaťovičová,     Katarína Goffová,     Dávid Selnekovič,     Fedor Čiampor Jr
10.3897/zookeys.912.47796
 17-02-2020
 Unique: 3256 | Total: 4801  | Access Period:
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 25-64
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Integrative taxonomy of the genus Dudgeodes Sartori, 2008 (Insecta, Ephemeroptera, Teloganodidae) from the Philippines with description of new species and supplementary descriptions of Southeast Asian species
    Jhoana M. Garces,     Michel Sartori,     Hendrik Freitag
10.3897/zookeys.910.48659
 10-02-2020
 Unique: 3564 | Total: 5780  | Access Period:
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 93-129
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Research Article
Sparsorythus sescarorum, new species from Mindoro, Philippines (Ephemeroptera, Tricorythidae)
    Jhoana M. Garces, Ernst Bauernfeind,     Hendrik Freitag
10.3897/zookeys.795.28412
 05-11-2018
 Unique: 3266 | Total: 4938  | Access Period:
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 13-30
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Research Article
Three new species of Grouvellinus Champion, 1923 from Maliau Basin, Sabah, Borneo, discovered by citizen scientists during the first Taxon Expedition (Insecta, Coleoptera, Elmidae)
    Hendrik Freitag, Clister V. Pangantihon,     Iva Njunjić
10.3897/zookeys.754.24276
 30-04-2018
 Unique: 6000 | Total: 12980  | Access Period:
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 1-21
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Research Article
Hydraena (Hydraenopsis) ateneo, new species (Coleoptera, Hydraenidae) and other aquatic Polyphaga from a small habitat patch in a highly urbanized landscape of Metro Manila, Philippines
    Hendrik Freitag
10.3897/zookeys.329.5955
 05-09-2013
 Unique: 8812 | Total: 12366  | Access Period:
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 9-21
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Research Article
Ancyronyx Erichson, 1847 (Coleoptera, Elmidae) from Mindoro, Philippines, with description of the larvae and two new species using DNA sequences for the assignment of the developmental stages
    Hendrik Freitag
10.3897/zookeys.321.5395
 06-08-2013
 Unique: 6800 | Total: 10477  | Access Period:
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 35-64
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Research Article
Larvae and a new species of Ancyronyx Erichson, 1847 (Insecta, Coleoptera, Elmidae) from Palawan, Philippines, using DNA sequences for the assignment of the developmental stages
    Hendrik Freitag, Michael Balke
10.3897/zookeys.136.1914
 13-10-2011
 Unique: 9017 | Total: 12739  | Access Period:
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 47-82
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