Records of Ancyronyx species from Mi…

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Full Title

Records of Ancyronyx species from Mindoro


Larval and adult stages of Ancyronyx (Insecta: Coleoptera: Elmidae) including new species from Mindoro Island, the Philippines, are listed with detailed notes on their collection sites

Temporal coverages

Date range: Nov 21, 1992 - Apr 4, 2013

Language of Metadata


Language of Data


Hendrik Freitag
Associate Professor
Ateneo de Manila University Loyola Heights 1101 Quezon City NCR Philippines
Metadata author
Hendrik Freitag
Associate Professor
Ateneo de Manila University Loyola Heights 1101 Quezon City NCR Philippines
Administrative contact
Hendrik Freitag
Associate Professor
Ateneo de Manila University Loyola Heights 1101 Quezon City NCR Philippines


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Publication Date

Aug 2, 2013

Registration Date

Oct 24, 2013

Served by

Pensoft Data Publishing Center

External Data

Metadata Documents

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Island of Mindoro, Philippines


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Other Contacts

Principal investigator
Hendrik Freitag

Taxonomic Coverage

Larval and adult stages of four species of Ancyronyx

Ancyronyx (Spider Water Beetles)

Survey and Evaluation of Rural Landscape Biodiversity of Roxas, Oriental Mindoro, with Identification and Scientific Description of Taxa New to Science, Identification of Priority Areas for Conservation

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Study area description

Main focus: Baroc River Catchment, San Vicente, Roxas, Oriental Mindoro, Philippines

Design description

The Baroc River Catchment Survey of the Ateneo de Manila University focuses on the Key Biodiversity Area “Hinunduang Mt.”, classified as a terrestrial and inland water area of very high biological importance and extremely high critical conservation priority, under high socioeconomic pressure, which is, however, only subjected to moderate conservation efforts and not yet formally protected. Recent project collections and previously collected specimens from Mindoro were included in the study. They are partly from other conservation and research priority areas of high and highest urgency (“Naujan Lake National Park” and “Puerto Galera.”).


Commission on Higher Education (Philippines), PHERNet program; Ateneo de Manila University Loyola Schools Scholarly Work Grant

Project Personnel

Principal investigator
Hendrik Freitag



Study extent

The sampling of all study sites within the main area in focus (Baroc River Catchment, Roxas) was replicated for at least four times between 2011 and 2013, covering both, dry and rainy seasons. All other collection sites were surveyed once by different collectors, except for the Tamaraw Falls, Puerto Galera (one replicate).

Sampling description

All specimens were collected from submerged substrates by the use of a hand-net or manually gathered from coarse particulate organic matter. Letter codes in parenthesis refer to a particular sampling station and microhabitat of the Baroc River Catchment. Number codes are arbitrary.

Method Steps

  1. The material was preserved in 95% ethyl alcohol to allow genetic sequencing. Most material was retrieved during the ongoing Baroc River Catchment Survey. Material collections from the 1990s were examined at the Natural History Museum Vienna, Austria (NMW), the Senckenberg Museum für Tierkunde Dresden, Germany (SMTD), and the Zoological Museum of the University Copenhagen, Denmark (ZMUC).

Collection name


Collection Identifier

see acronym

Parent Collection Identifier


Specimen Preservation method


Curatorial Units

  • 350 ± 100 specimens (larvae and adults)


Freitag H, Balke M (2011) 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. ZooKeys 136: 47–82.

Freitag H, Jäch MA (2007) The genus Ancyronyx Erichson, 1847 (Coleoptera, Elmidae) in Palawan and Busuanga, (Philippines) with description of six new species. Zootaxa 1590: 37–59.

Freitag H, Pangantihon C (2010) Aquatic Coleoptera and Heteroptera of the Lake Naujan National Park, Mindoro Oriental, the Philippines. Philippine Scientist 47: 126–173.

Jäch MA (1994) A taxonomic review of the Oriental species of the genus Ancyronyx Erichson, 1847 (Coleoptera, Elmidae). Revue suisse de Zoologie 101 (3): 601–622.