The National Red List Project

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Assessment ID
220159004
Taxon name
Xerotricha corderoi
Uploaded by
IUCN SSC Spain Species Specialist Group (EsSSG)
Taxonomic information
Scientific name
Xerotricha corderoi
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Molluscs
Kingdom
Animalia
Phylum
Class
Order
Family
Genus
Xerotricha
Species
corderoi
Species authority
Location and scope
Scope (of the Assessment)
National
Countries included within the scope of the assessment
Spain
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Least Concern
Criteria system used
IUCN

(see Assessment details)

Assessment details
Year assessed
2024
Assessors/contributors/reviewers listed
Martínez-Ortí, A.
Criteria system used
IUCN
Reference for methods given
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, U.K. ii + 30pp.
Further information
Endemism (according to assessment)
Endemic to region
Yes
Habitat and systems
Ecological system type
Terrestrial
Freshwater
Marine
Publication
Global and Europe Assessment. The IUCN Red List of Threatened Species
IUCN. 2025. The IUCN Red List of Threatened Species. Version 2025-2. https://www.iucnredlist.org.
Assessment ID
220224027
Taxon name
Xerotricha bierzona
Uploaded by
IUCN SSC Spain Species Specialist Group (EsSSG)
Taxonomic information
Scientific name
Xerotricha bierzona
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Molluscs
Kingdom
Animalia
Phylum
Class
Order
Family
Genus
Xerotricha
Species
bierzona
Species authority
Location and scope
Scope (of the Assessment)
National
Countries included within the scope of the assessment
Spain
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Near Threatened
Criteria system used
IUCN

(see Assessment details)

Assessment details
Year assessed
2022
Assessors/contributors/reviewers listed
Gómez-Moliner, B.J.
Criteria system used
IUCN
Reference for methods given
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, U.K. ii + 30pp.
Further information
Endemism (according to assessment)
Endemic to region
Yes
Habitat and systems
Ecological system type
Terrestrial
Freshwater
Marine
Publication
Global and Europe Assessment. The IUCN Red List of Threatened Species
IUCN. 2025. The IUCN Red List of Threatened Species. Version 2025-2. https://www.iucnredlist.org.
Assessment ID
220194364
Taxon name
Xerotricha adoptata
Uploaded by
IUCN SSC Spain Species Specialist Group (EsSSG)
Taxonomic information
Scientific name
Xerotricha adoptata
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Molluscs
Kingdom
Animalia
Phylum
Class
Order
Family
Genus
Xerotricha
Species
adoptata
Species authority
Location and scope
Scope (of the Assessment)
National
Countries included within the scope of the assessment
Spain
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Data Deficient
Criteria system used
IUCN

(see Assessment details)

Assessment details
Year assessed
2024
Assessors/contributors/reviewers listed
Neiber, M.T. & Groh, K.
Criteria system used
IUCN
Reference for methods given
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, U.K. ii + 30pp.
Further information
Endemism (according to assessment)
Endemic to region
Yes
Habitat and systems
Ecological system type
Terrestrial
Freshwater
Marine
Publication
Global and Europe Assessment. The IUCN Red List of Threatened Species
IUCN. 2025. The IUCN Red List of Threatened Species. Version 2025-2. https://www.iucnredlist.org.
Assessment ID
220234585
Taxon name
Xerosecta promissa
Uploaded by
IUCN SSC Spain Species Specialist Group (EsSSG)
Taxonomic information
Scientific name
Xerosecta promissa
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Molluscs
Kingdom
Animalia
Phylum
Class
Order
Family
Genus
Xerosecta
Species
promissa
Species authority
Location and scope
Scope (of the Assessment)
Regional (multi-national)
Countries included within the scope of the assessment
Spain
Portugal
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Least Concern
Criteria system used
IUCN

(see Assessment details)

Assessment details
Year assessed
2022
Assessors/contributors/reviewers listed
Gómez-Moliner, B.J. & Arrébola, J.R.
Criteria system used
IUCN
Reference for methods given
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, U.K. ii + 30pp.
Further information
Endemism (according to assessment)
Endemic to region
No
Habitat and systems
Ecological system type
Terrestrial
Freshwater
Marine
Publication
Global and Europe Assessment. The IUCN Red List of Threatened Species
IUCN. 2025. The IUCN Red List of Threatened Species. Version 2025-2. https://www.iucnredlist.org.
Assessment ID
220213112
Taxon name
Xerosecta explanata
Uploaded by
IUCN SSC Spain Species Specialist Group (EsSSG)
Taxonomic information
Scientific name
Xerosecta explanata
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Molluscs
Kingdom
Animalia
Phylum
Class
Order
Family
Genus
Xerosecta
Species
explanata
Species authority
Location and scope
Scope (of the Assessment)
Regional (multi-national)
Countries included within the scope of the assessment
Spain
France
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Endangered
Criteria system used
IUCN

(see Assessment details)

Assessment details
Year assessed
2024
Assessors/contributors/reviewers listed
Neubert, E. & Prié, V.
Criteria system used
IUCN
Reference for methods given
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, U.K. ii + 30pp.
Further information
Endemism (according to assessment)
Endemic to region
No
Habitat and systems
Ecological system type
Terrestrial
Freshwater
Marine
Publication
Global and Europe Assessment. The IUCN Red List of Threatened Species
IUCN. 2025. The IUCN Red List of Threatened Species. Version 2025-2. https://www.iucnredlist.org.
Assessment ID
220162186
Taxon name
Xerosecta cespitum
Uploaded by
IUCN SSC Spain Species Specialist Group (EsSSG)
Taxonomic information
Scientific name
Xerosecta cespitum
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Molluscs
Kingdom
Animalia
Phylum
Class
Order
Family
Genus
Xerosecta
Species
cespitum
Species authority
Location and scope
Scope (of the Assessment)
Regional (multi-national)
Countries included within the scope of the assessment
Spain
France
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Least Concern
Criteria system used
IUCN

(see Assessment details)

Assessment details
Year assessed
2024
Assessors/contributors/reviewers listed
Gargominy, O.
Criteria system used
IUCN
Reference for methods given
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, U.K. ii + 30pp.
Further information
Endemism (according to assessment)
Endemic to region
No
Habitat and systems
Ecological system type
Terrestrial
Freshwater
Marine
Publication
Global and Europe Assessment. The IUCN Red List of Threatened Species
IUCN. 2025. The IUCN Red List of Threatened Species. Version 2025-2. https://www.iucnredlist.org.
Assessment ID
ESNRL1101520253
Taxon name
Xerosecta adolfi
Uploaded by
IUCN SSC Spain Species Specialist Group (EsSSG)
Taxonomic information
Scientific name
Xerosecta adolfi
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Molluscs
Kingdom
Animalia
Phylum
Class
Order
Family
Genus
Xerosecta
Species
adolfi
Species authority
Location and scope
Scope (of the Assessment)
National
Countries included within the scope of the assessment
Spain
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Endangered
Criteria system used
IUCN

(see Assessment details)

Assessment details
Year assessed
2025
Assessors/contributors/reviewers listed
Gómez-Moliner, B.
Criteria system used
IUCN
Reference for methods given
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, U.K. ii + 30pp. and IUCN (2012) Guidelines for Application of IUCN Red List Criteria at Regional and National Levels: Version 4.0. Gland, Switzerland and Cambridge, UK: IUCN. iii + 41pp
Further information
Endemism (according to assessment)
Endemic to region
Yes
Habitat and systems
Ecological system type
Terrestrial
Freshwater
Marine
Publication
Spain assessment. The IUCN National Red List of Spanish Threatened Species
IUCN SSC EsSSG and IUCN Red List Unit, 2025. The IUCN National Red List of Spanish Threatened Species.
Assessment ID
214173671
Taxon name
Xeroplexa ponsulensis
Uploaded by
IUCN SSC Spain Species Specialist Group (EsSSG)
Taxonomic information
Scientific name
Xeroplexa ponsulensis
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Molluscs
Kingdom
Animalia
Phylum
Class
Order
Family
Genus
Xeroplexa
Species
ponsulensis
Species authority
Location and scope
Scope (of the Assessment)
Regional (multi-national)
Countries included within the scope of the assessment
Spain
Portugal
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Least Concern
Criteria system used
IUCN

(see Assessment details)

Assessment details
Year assessed
2022
Assessors/contributors/reviewers listed
Gómez-Moliner, B.J.
Criteria system used
IUCN
Reference for methods given
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, U.K. ii + 30pp.
Further information
Endemism (according to assessment)
Endemic to region
No
Habitat and systems
Ecological system type
Terrestrial
Freshwater
Marine
Publication
Global and Europe Assessment. The IUCN Red List of Threatened Species
IUCN. 2025. The IUCN Red List of Threatened Species. Version 2025-2. https://www.iucnredlist.org.
Assessment ID
220088055
Taxon name
Xeroplexa olisippensis
Uploaded by
IUCN SSC Spain Species Specialist Group (EsSSG)
Taxonomic information
Scientific name
Xeroplexa olisippensis
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Molluscs
Kingdom
Animalia
Phylum
Class
Order
Family
Genus
Xeroplexa
Species
olisippensis
Species authority
Location and scope
Scope (of the Assessment)
Regional (multi-national)
Countries included within the scope of the assessment
Spain
Portugal
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Least Concern
Criteria system used
IUCN

(see Assessment details)

Assessment details
Year assessed
2024
Assessors/contributors/reviewers listed
Martínez-Ortí, A.
Criteria system used
IUCN
Reference for methods given
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, U.K. ii + 30pp.
Further information
Endemism (according to assessment)
Endemic to region
No
Habitat and systems
Ecological system type
Terrestrial
Freshwater
Marine
Publication
Global and Europe Assessment. The IUCN Red List of Threatened Species
IUCN. 2025. The IUCN Red List of Threatened Species. Version 2025-2. https://www.iucnredlist.org.
Assessment ID
220265330
Taxon name
Xerocrassa zaharensis
Uploaded by
IUCN SSC Spain Species Specialist Group (EsSSG)
Taxonomic information
Scientific name
Xerocrassa zaharensis
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Molluscs
Kingdom
Animalia
Phylum
Class
Order
Family
Genus
Xerocrassa
Species
zaharensis
Species authority
Location and scope
Scope (of the Assessment)
National
Countries included within the scope of the assessment
Spain
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Vulnerable
Criteria system used
IUCN

(see Assessment details)

Assessment details
Year assessed
2022
Assessors/contributors/reviewers listed
Gómez-Moliner, B.J. & Arrébola, J.R.
Criteria system used
IUCN
Reference for methods given
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, U.K. ii + 30pp.
Further information
Endemism (according to assessment)
Endemic to region
Yes
Habitat and systems
Ecological system type
Terrestrial
Freshwater
Marine
Publication
Global and Europe Assessment. The IUCN Red List of Threatened Species
IUCN. 2025. The IUCN Red List of Threatened Species. Version 2025-2. https://www.iucnredlist.org.