Everettia minuta, Marzuki & Liew & Mohd-Azlan, 2021
publication ID |
https://dx.doi.org/10.3897/zookeys.1035.60843 |
publication LSID |
lsid:zoobank.org:pub:ED19022E-A170-4DB7-9587-FEFE15D07854 |
persistent identifier |
https://treatment.plazi.org/id/D8EF63CB-DA58-4A13-B619-10D768EF6117 |
taxon LSID |
lsid:zoobank.org:act:D8EF63CB-DA58-4A13-B619-10D768EF6117 |
treatment provided by |
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scientific name |
Everettia minuta |
status |
sp. nov. |
Everettia minuta sp. nov. Figures 41C View Figure 41 , 42A-C View Figure 42
Material examined.
Holotype (SH 5.72 mm, SW 10.00 mm) (MZU.MOL.20.23), Malaysia, Sarawak, Kuching Division , Fairy Caves (Site 1), south part of Gunung Kapor, 4 miles SW Bau, 1°22'53.76"N, 110°7'4.34"E, coll. M. E. Marzuki, 8.IV.2017 GoogleMaps . Paratypes: 7 ex. (ME0008965), same data as the holotype GoogleMaps ; 1 ex. (MZU.MOL.20.24), the same locality as the holotype, coll. M. E. Marzuki, 23.VI.2010 GoogleMaps ; 5 ex. (ME0001512), the same locality, coll. M. E. Marzuki, 11.III.2011 GoogleMaps ; 1 ex. (ME0001513), Gunung Batu , limestone outcrop along Skio road, Jambusan, 2.4 miles E Bau, 1°23'50.65"N, 110°11'19.99"E, coll. M. E. Marzuki, 11.III.2011 GoogleMaps ; 4 ex. (ME0009139), Lobang Angin ( Site 1), limestone outcrop near Sungai Sarawak Kanan, 1.75 miles W of Bau, 1°24'48.14"N, 110°8'12.21"E, coll. M. E. Marzuki, 15.IV.2017 GoogleMaps ; 1 ex. (ME0009222), Lobang Angin ( Site 2), limestone outcrop near Sungai Sarawak Kanan, 1.75 miles W of Bau, 1°24'51.01"N, 110°8'13.48"E, coll. M. E. Marzuki, 16.IV.2017 GoogleMaps ; 1 ex. (ME0009466), Serian Division; Gunung Storib, small northern peak of Gunung Silabor, 15 miles S Serian, 0°57'30.75"N, 110°30'3.00"E, 22.IX.2017 GoogleMaps .
Differential diagnosis.
The new species is similar to Everettia jucunda (Pfeiffer, 1863), E. bangueyensis (Smith, 1895) and E. jucundior Liew, Vermeulen & Schilthuizen, 2009 from Sabah. Everettia jucunda differs by having a larger shell (<17.3 mm wide), with one and half more whorls. Everettia jucundior differs by having a larger shell (<19.5 mm wide) with slightly shouldered whorls. Everettia bangueyensis differs by having a smaller shell (<9.0 mm wide), and a flat spire with slightly shouldered whorls.
Description.
Shell small, rather thin, translucent, pale brown, spire moderately elevated. Surface with a glossy lustre. Whorls convex. Number of whorls < 5¼. Protoconch almost smooth, spiral striation absent with inconspicuous radial threads near the suture. Teleoconch: spiral sculpture with inconspicuous, densely placed spiral grooves on both apical side and apertural sides. Radial sculpture almost smooth, with inconspicuous radial threads near suture and below periphery. Periphery round; suture slightly depressed. Aperture lunulate. Peristome simple; continuous, somewhat sinuous, thickened, and reflected on columellar side, not thickened nor reflected on basal and palatal sides. Umbilicus narrow, partly covered by the reflected peristome; umbilical region moderately concave. Dimensions: shell height <7.62 mm; shell width <13.17 mm; diameters of the first three whorls 1.45 mm, 2.40 mm, and 4.34 mm, respectively; aperture height <4.65 mm; aperture width <6.58 mm.
Geographic distribution and habitat.
Known from the Bau and Serian-Padawan limestone hills. Only dry shells were not found during the surveys.
Etymology.
From the Latin Everettia minuta , meaning small, in reference to the smaller shell compare to other species of Everettia from Sarawak.
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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