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Juga nigrina

(I. Lea, 1856)

Black Juga

GNRUnranked Found in 9 roadless areas NatureServe Explorer →
GNRUnrankedGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.1274120
Element CodeIMGASK4250
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
Endemicendemic to a single nation
KingdomAnimalia
PhylumMollusca
ClassGastropoda
OrderCaenogastropoda
FamilySemisulcospiridae
GenusJuga
Concept Reference
Strong, E.E., J.T. Garner, P.D. Johnson, and N.V. Whelan. 2022. A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae). European Journal of Taxonomy 848: 1-97. Online: https://doi.org/10.5852/ejt.2022.848.1993
Taxonomic Comments
A systematic revision of the genus Juga found that almost all species previously considered valid were para- or polyphyletic grades of organization in shell morphology. Most species previously suggested to be putatively new were confirmed to be morphological variants of species already described (Strong and Whelan 2019, Strong et al. 2022). Based on this analysis, Strong and Whelan (2022) synonymize Juga chacei (Chace Juga) J. orickensis (Redwood Juga), and Juga sp. 9 (Shasta Juga) with J. nigrina.
Ecology & Habitat

Habitat

This species is found in small creeks to large rivers (Strong et al. 2022).
Other Nations (1)
United StatesNNR
ProvinceRankNative
CaliforniaSNRYes
OregonSNRYes
Roadless Areas (9)
California (6)
AreaForestAcres
Cow CreekShasta-Trinity National Forest22,627
KellySix Rivers National Forest5,195
North Fork SmithSix Rivers National Forest37,898
Orleans Mtn. BSix Rivers National Forest17,183
Pilot CreekSix Rivers National Forest9,192
Siskiyou BSix Rivers National Forest18,871
Oregon (3)
AreaForestAcres
Cougar BluffUmpqua National Forest5,574
LastUmpqua National Forest7,666
Shasta CostaSiskiyou National Forests14,420
References (1)
  1. Strong, E.E., J.T. Garner, P.D. Johnson, and N.V. Whelan. 2022. A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae). European Journal of Taxonomy 848: 1-97. Online: https://doi.org/10.5852/ejt.2022.848.1993