Juga caerulea, Strong & Garner & Johnson & Whelan, 2022
publication ID |
https://doi.org/ 10.5852/ejt.2022.848.1993 |
publication LSID |
lsid:zoobank.org:pub:CD87E211-18D1-43DF-A4A4-70D8D111C969 |
DOI |
https://doi.org/10.5281/zenodo.7467068 |
persistent identifier |
https://treatment.plazi.org/id/B1DFDF9D-9B8B-471B-822A-80F281835610 |
taxon LSID |
lsid:zoobank.org:act:B1DFDF9D-9B8B-471B-822A-80F281835610 |
treatment provided by |
Felipe |
scientific name |
Juga caerulea |
status |
sp. nov. |
Juga caerulea View in CoL sp. nov.
urn:lsid:zoobank.org:act:B1DFDF9D-9B8B-471B-822A-80F281835610
Oxytrema bulbosa – Morrison 1954: 361, 384, pl. 11 fig. 5.
Juga (Oreobasis) n. sp. 5 – Frest & Johannes 1995a: 181. — Johannes 2015: 27.
Juga (Oreobasis) OTU 4 – Campbell et al. 2016: 160.
Blue Mountains Juga View in CoL – Strong & Whelan 2019: 89.
Etymology
‘ Caeruleus -a -um ’, Latin for ‘blue’, in reference to the Blue Mountains where it is found, and to the bluish to purplish appearance of the aperture interior of fresh collected shells.
Type material
Holotype USA • 1 spm (L = 15.02 mm); Oregon, Grant County, Phipps Meadow along U.S. Hwy 26; 44.5816, -118.4419; 10 Jul. 2014; J.T. Garner and N.V. Whelan leg.; GenBank: MK472115 View Materials , MK464487 View Materials , MK480730 View Materials ; USNM 1294988 About USNM . GoogleMaps
Other material examined 13 lots, 66 specimens, of which 11 were sequenced.
USA – Oregon • 37 spms; Grant Co., 10 mi E of Austin, Blue Mountains, stream, John Day River drainage; [44.5987, -118.3364]; alt. 4000 ft; 25 May 1939; V.B. Scheffer leg.; USNM 473801 About USNM GoogleMaps • 18 spms; Grant Co., Phipps Meadow along U.S. Hwy 26; 44.5816, -118.4419; 10 Jul. 2014; J.T. Garner and N.V. Whelan leg.; USNM 1295000 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472116 View Materials , MK464488 View Materials ; USNM 1294989 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472117 View Materials , MK464489 View Materials , MK480731 View Materials ; USNM 1294990 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472118 View Materials , MK464490 View Materials , MK480732 View Materials ; USNM 1294991 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472119 View Materials , MK464491 View Materials ; USNM 1294992 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472120 View Materials , MK464492 View Materials ; USNM 1294993 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472121 View Materials , MK464493 View Materials ; USNM 1294994 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472122 View Materials , MK464494 View Materials , MK480733 View Materials ; USNM 1294995 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472123 View Materials , MK464495 View Materials , MK480734 View Materials ; USNM 1294996 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472124 View Materials , MK464496 View Materials , MK480735 View Materials ; USNM 1294997 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472125 View Materials , MK464497 View Materials , MK480736 View Materials ; USNM 1294998 About USNM GoogleMaps • 1 spm; same collection data as for preceding; GenBank : MK472126 View Materials , MK464498 View Materials ; USNM 1294999 About USNM GoogleMaps .
Description
SHELL. Thin, moderate in size, reaching ~ 1.5 cm in length; turriform, conical in shape, spire height moderate ( Fig. 12 View Fig ). Whorls convex, suture moderately impressed. Aperture oval in shape, lip smooth, simple to slightly sinuous. Spiral sculpture of indistinct, fine striae, variable in strength and number. Axial sculpture of fine, orthocline to weakly opisthocyrt or sinuous growth lines; plications lacking. Shell dark brown to black, occasionally with a lighter subsutural band. Interior of aperture bluish in color, occasionally tinged with purple.
RADULA. Rachidian broadly rectangular, wider than tall, with convex lower margin and projecting outer corners; basal denticles lacking or vestigial ( Fig. 13 View Fig ). Upper margin slightly concave with cutting edge bearing central, elongate conical cusp, and two to three stout, conical denticles on each side. Lateral teeth with prominent triangular cusp flanked by two inner and two to three outer, triangular denticles, and frequently a membranous outermost denticle. Marginal teeth with broadly rounded cutting edges and long, slender, flattened shafts with membranous flanges along inner and outer edges. Narrow inner flanges along distal half to two-thirds of shafts; broad outer flanges extending almost to tooth bases. Inner marginal teeth with ~four and outer marginal teeth with ~five flattened denticles.
Distribution and ecology
In springs and spring runs of the John Day River drainage, northeastern Oregon ( Fig. 14A View Fig ).
Remarks
This species is characterized by its simple, smooth, dark, lightly constructed shell, without distinguishing sculpture; the only known populations are rather uniform in shape and size.
Distribution
Juga caerulea sp. nov. is a highly disjunct and restricted species, occurring in springs and spring runs from a few sites within a single spring complex in Phipps Meadow, the headwaters of the Middle Fork of the John Day River in the Malheur National Forest. One lot collected in 1939 (USNM 473801) indicates that historically it may have occurred in small streams in the area; Morrison (1954: 361, 384, pl. 11 fig. 5) identified these specimens as Oxytrema bulbosa and provided a sketch of the head-foot of a female to show the egg laying groove and ovipositor. However, recent efforts to locate the species elsewhere in the Blue Mountains have been unsuccessful ( Frest & Johannes 1995a). Phipps Meadow, the source of the type material, has been heavily affected by grazing and Frest & Johannes (1995a) considered existing surveys were sufficient to merit a status of Endangered at the Federal or State level. The Blue Mountain Land Trust recently purchased Phipps Meadow with the goal of protecting and restoring the meadow’s riparian habitat (https://bmlt.org/news/phipps-meadow).
Common name
The common name for this species is the Blue Mountain Juga ( Johannes 2015) . It has also been referred to as the Blue Mountains Juga ( Frest & Johannes 1995a; Duncan 2008; Strong & Whelan 2019).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Genus |
Juga caerulea
Strong, Ellen E., Garner, Jeffrey T., Johnson, Paul D. & Whelan, Nathan V. 2022 |
Juga
Strong & Whelan 2019: 89 |
Juga (Oreobasis) OTU 4
Campbell D. C. & Clark S. A. & Johannes E. J. & Lydeard C. & Frest T. J. 2016: 160 |
Juga (Oreobasis) n. sp. 5
Johannes E. J. 2015: 27 |
Frest T. J. & Johannes E. J. 1995: 181 |
Oxytrema bulbosa
Morrison J. P. E. 1954: 361 |