H. Freitag

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Diversity of aquatic and riparian Coleoptera of the Philippines: checklist, state of knowledge, priorities for future research and conservation

M. Jäch, G. Wewalka, H. Freitag, 2016 .

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

M. Sartori, H. Freitag, J. Garces, 2020, ZooKeys.

Integrative taxonomy of the genus

M. Sartori, H. Freitag, J. Garces, 2020 .

Hydraena (s.str.) dinarica, new species (Coleoptera: Hydraenidae) along with further records of Hydraena spp. from Durmitor National Park, Montenegro and comments on the DNA barcoding problem with the genus

M. Delledonne, S. Maestri, M. Paterno, 2021, Biodiversity data journal.

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

H. Freitag, Arthien Lovell Pelingen, 2020, ZooKeys.

Sparsorythussescarorum, new species from Mindoro, Philippines (Ephemeroptera, Tricorythidae)

H. Freitag, J. Garces, E. Bauernfeind, 2018, ZooKeys.

Checklist of the aquatic Hemiptera (Heteroptera: Gerromorpha and Nepomorpha) of Cambodia, with descriptions of new species of Microvelia Westwood, 1834 and Ranatra Fabricius, 1790

H. Zettel, H. Freitag, S. Phauk, 2017 .

A global agenda for advancing freshwater biodiversity research.

Hermoso, D. Baird, M. Monaghan, 2021, Ecology letters.

Carbohydrate-deficient transferrin as a screening marker for drinking in a general hospital population.

A. Neumeister, O. Lesch, R. Mader, 1996, Alcohol and alcoholism.

Serum Biochemical Profile of Captive-bred Philippine Crocodiles (Crocodylus mindorensis Schmidt, 1935) Sub-adults

S. F. Velasquez, J. A. Ragaza, H. Freitag, 2021, Philippine Journal of Science.

Notes on Notonectidae (Hemiptera: Heteroptera) from southeastern Asia, mostly from Brunei and the Philippines

D. Lane, H. Zettel, H. Freitag, 2012 .

Two new species of Anacaena Thomson, 1859 (Coleoptera, Hydrophilidae) from Northern Luzon, Philippines

H. Freitag, Emmanuel D. Delocado, Enrico Gerard S. Sanchez, 2022, ZooKeys.

Diversity of Trichoptera emergence and their longitudinal distribution along streams in central Palawan, the Philippines

H. Freitag, W. Mey, 2020, Zoosymposia.

Two new species of Byrrhinus Motschulsky, 1858 (Coleoptera, Limnichidae, Limnichinae) from Negros, Philippines

H. Freitag, Emmanuel D. Delocado, 2021, ZooKeys.

New species of caddisflies (Insecta: Trichoptera) from emergence traps at streams in central Palawan, Philippines

H. Freitag, W. Mey, 2019, Aquatic Insects.

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)

Zuzana Čiamporová-Zaťovičová, M. Jäch, H. Freitag, 2020, ZooKeys.

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)

Zuzana Čiamporová-Zaťovičová, M. Jäch, H. Freitag, 2020, ZooKeys.

Clues to Aquatic Beetle Research in Southeast Asia: A Multitude of Ecological Niches, Microhabitats and Deduced Field Sampling Techniques

H. Freitag, 2015 .

A Mega-Diverse Water Beetle Genus (Coleoptera: Hydraenidae: Hydraena Kugelann) Commonly Overlooked in Southeast Asia and its Potential Use for Environmental Biomonitoring

H. Freitag, 2014 .

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

H. Freitag, 2013, ZooKeys.

AQUATIC INSECT EMERGENCE COLLECTIONS OF RIVERS IN THE ST. PAUL NATIONAL PARK, PALAWAN, PHILIPPINES AND METHODOLOGICAL IMPLICATIONS FOR ECOLOGICAL AND BIODIVERSITY STUDIES

H. Freitag, P. Leipzig, 2005 .

Composition and Longitudinal Patterns of Aquatic Insect Emergence in Small Rivers of Palawan Island, the Philippines

H. Freitag, 2004 .

Odonata Fauna of Riparian Habitats in Selected Areas of Luzon and Mindoro Region

R. Villanueva, H. Freitag, Randel D. Estacio, 2020 .

A taxonomic review of the genus Ancyronyx Erichson, 1847 from Sulawesi (Insecta: Coleoptera: Elmidae)

H. Freitag, J. Kodada, 2017 .

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

H. Freitag, 2013, ZooKeys.

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

M. Balke, H. Freitag, 2011, ZooKeys.

The complex evolutionary history and phylogeography of Caridina typus (Crustacea: Decapoda): long-distance dispersal and cryptic allopatric species

A. R. Pepato, T. J. Page, M. de Bruyn, 2017, Scientific Reports.

Aquatic Heteroptera Of the Lake Manguao Catchment, Palawan and New Rank Of Rhagovelia kawakamii hoberlandti Hungerford & Matsuda 1961

H. Zettel, H. Freitag, 2012 .

A Rapid and Accurate MinION-Based Workflow for Tracking Species Biodiversity in the Field

Massimo Delledonne, Menno Schilthuizen, Simone Maestri, 2019, bioRxiv.

In Memoriam: Ignacio Ribera (1963–2020)

M. Balke, H. Freitag, Emmanuel D. Delocado, 2020, Tijdschrift voor Entomologie.

Aquatic beetles Communities & REDD + Leaf phenology & transpiration Attracting ibises to safe roost sites

Ehlers, H. Freitag, Sarah, 2019 .

Aquatic Polyphaga (Insecta: Coleoptera) from Kampong Speu Province, Cambodia

C. Khin, H. Freitag, J. Garces, 2018 .

Palawaneuria, a new subgenus of Compsoneuria and new species of Compsoneuria and Afronurus (Ephemeroptera, Heptageniidae) from Palawan, Philippines

H. Freitag, D. Braasch, 2008 .

An integrated molecular and morphological study of the subfamily Suaedoideae Ulbr. (Chenopodiaceae)

P. Schütze, H. Freitag, K. Weising, 2003, Plant Systematics and Evolution.

Aquatic Coleoptera of the Lake Manguao Catchment, Palawan, the Philippines

H. Zettel, H. Freitag, 2014 .

REVISION OF THE GENUS INSULAMON NG & TAKEDA, 1992 (CRUSTACEA: DECAPODA: POTAMIDAE) WITH DESCRIPTION OF FOUR NEW SPECIES

H. Freitag, 2012 .

Two new species of Geosesarma De Man, 1892 (Crustacea: Brachyura: Sesarmidae) from Palawan, the Philippines

P. Ng, H. Freitag, Marivene R. Manuel-Santos, 2016 .

Additional records and new species of Hydraena Kugelann, 1794 (Insecta: Coleoptera: Hydraenidae) from Balabac and Palawan, Philippines

H. Freitag, M. Hornyák, 2021, Tijdschrift voor Entomologie.

Longitudinal zonation patterns and determinants in Decapoda (Crustacea) in rivers of Palawan Island, Philippines

H. Freitag, 2005 .

TWO NEW SPECIES OF PARATHELPHUSA H. MILNE EDWARDS, 1853, FROM THE PHILIPPINES (CRUSTACEA: DECAPODA: BRACHYURA: PARATHELPHUSIDAE)

D. Yeo, H. Freitag, 2004 .

Hydraenidae (Insecta: Coleoptera) of Mindoro, Philippines. I: Hydraena Kugelann, 1794 of the Baroc River basin, Roxas, Oriental Mindoro with description of three new species

A. Vidal, H. Freitag, Kimberly Go, 2017 .

Aquatic Coleoptera and Heteroptera of the Lake Naujan National Park, Oriental Mindoro, the Philippines

H. Freitag, C. Pangantihon, 2012 .

The genus Ancyronyx Erichson, 1847 (Coleoptera, Elmidae) in Palawan and Busuanga, (Philippines) with descriptions of six new species

M. Jäch, H. Freitag, 2007 .

Revision of the species of Hydraena Kugelann (Coleoptera: Hydraenidae) from Palawan and Busuanga, with descriptions of eleven new species, and redescription of Hydraena (Hydraenopsis) scabra d'Orchymont, 1925

M. Jäch, H. Freitag, 2007 .

Water penny beetles of Palawan, Philippines, with descriptions of two new species and one new subspecies (Coleoptera: Psephenidae)

M. Jäch, H. Freitag, Chi-Feng Lee, 2005 .

Adaptations of an Emergence Trap for Use in Tropical Streams

H. Freitag, 2004 .

Revision of Anacaena THOMSON, 1859 XI. Republic of the Philippines (Coleoptera: Hydrophilidae)

H. Freitag, A. Komarek, 2014 .