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Drawida ofunatoensis 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_onStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Annelida Clitellata Megadrilaceae Moniligastridae

Scientific Name: Drawida ofunatoensis Ohfuchi, 1938
Taxonomic Source(s): Blakemore, R.J. 2012. Japanese earthworms revisited a decade on (Oligochaeta: Megadrilacea). Zoology in the Middle East 58(4): 15-22. doi.org/10.1080/09397140.2012.10648981.
Taxonomic Notes: Inconsistencies and errors in its original description were noted by in Blakemore et al. (2014: 141) and its supposed synonymy within Drawida nemora dismissed based upon the information presented in this latter publication, in Easton (1981: tab. 1) and Blakemore & Kupriyanova (2010: tab. 3).

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2018
Date Assessed: 2017-08-08
Assessor(s): Blakemore, R.J.
Reviewer(s): Mumford, N.
Justification:
This species is listed as Vulnerable due to its AOO of 20km² and plausible threats from natural tsunamis, possibly nuclear fallout, forestry management and invasive species together could result in the rapid decline in the status of this species.

Geographic Range [top]

Range Description:This species is from Iwate-ken on coasts and Islets of Sanriku, and Ojika coast in Miagi-ken, Japan. The area of occupancy (AOO) for this species is 20 km² and the extent of occurrence (EOO) is 2,083 km².
Countries occurrence:
Native:
Japan
Additional data:
Estimated area of occupancy (AOO) - km2:20
Upper elevation limit (metres):1000
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species is only known from the original description from 1938.
Current Population Trend:Unknown
Additional data:
Extreme fluctuations:UnknownPopulation severely fragmented:Unknown

Habitat and Ecology [top]

Habitat and Ecology:It reportedly lives in environments where dead pine leaves are deposited, presumably in soil.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: This species is not known to be utilised.

Threats [top]

Major Threat(s): Possible threats to this species are forestry (since it is noted from under pine needle litter), and the unforeseen consequences of tsunamis.  The Sanriku area is known as the "Tsunami Coast" and has been subjected to severe damage within historical time, e.g. earthquakes in 1896, 1933 and 2011. The 2011 Tohoku Earthquake and Tsunami particularly affected Ofunato, the supposed type-locality of this species. Obviously this particular species has survived earlier earthquakes and tsunami.  However, its soil habitat may be adversely affected by nuclear radiation drift and fallout, not just from the destroyed Fukushima power station, but potentially from the local Onagawa plant that was also affected.  All soil organisms are at risk of competition and predation from both native and exotic species (such as ants, planarian flatworms and other earthworms), thus this is another potential threat.

Conservation Actions [top]

Conservation Actions: No conservation actions are in place for this species, more research is required into this species taxonomy and ecology.

Citation: Blakemore, R.J. 2018. Drawida ofunatoensis. The IUCN Red List of Threatened Species 2018: e.T117371227A117374378. . Downloaded on 25 September 2018.
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