Geostiba (Sibiota) alticola Lohse & Smetana, 1988
publication ID |
https://doi.org/ 10.5281/zenodo.155701 |
DOI |
https://doi.org/10.5281/zenodo.6277581 |
persistent identifier |
https://treatment.plazi.org/id/5B50E916-FFA5-391C-4D2D-FEA7FD7CFA3C |
treatment provided by |
Plazi |
scientific name |
Geostiba (Sibiota) alticola Lohse & Smetana, 1988 |
status |
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11. Geostiba (Sibiota) alticola Lohse & Smetana, 1988 View in CoL ( Figs. 262283 View FIGURES 262 266 View FIGURES 267 270 View FIGURES 271 283 )
Geostiba alticola Lohse & Smetana, 1988: 271 View in CoL .
Geostiba bicarinata: Lohse & Smetana, 1988: 273 View in CoL , ex parte (misidentification). Geostiba (Lioglutosipalia) carteriensis: Pace, 1997: 106 View in CoL , ex parte (misidentification).
Type material. Holotype ,, UNITED STATES: North Carolina: Buncombe Co.: Blue Ridge Parkway, Grey Beard Mountain View [35°42'37"N 82°21'51"W], 1700 m (A.Smetana), 4.vi.1986 ( CNCI); allotype,, North Carolina: Yancey Co.: Mt. Mitchell, 20002036m (A.Smetana), 4.vi.1986; paratypes: 3, 3, the same data as the holotype; 4,, the same data as the allotype (all – CNCI).
Additional material. UNITED STATES: North Carolina: McDowell Co.[?]: 27 specimens, Mt. Mitchell, Blue Ridge Parkway, 1700 m [this label is not precise; Mt. Mitchell is in Yancey County at least 5 kilometers from Blue Ridge Parkway; it is not possible to find coordinates for this sample] (J.S. & A.K.Ashe), sifted conifer litter, 2.viii.1991 ( KSEM); 2, ditto but 16761920 m ( KSEM); Buncombe Co:, 2, Craggy Dome, [35°42'20"N 82°22'00"W] (T.C.Barr, M.C.Bowling), 22.vii.1960 ( AMNH);, Blue Ridge Parkway, 16 km E Weaverville, Bearpen Knob, 35°41.91’N 82°23.05’W, 1740 m, mountain meadows, in dead grass under Rhododendron and Sorbus (V.I.Gusarov) , 25.vi.2001 ( SPSU); 12 specimens, ditto but 35°41.91’42.02’N 82°23.05 22.83’W, 1700 m, in forest litter, Acer , Betula , Rhododendron ; 18 specimens, 15 km E Weaverville, Pisgah National Forest, Bearpen Gap, 35°41.98’N 82°23.52’W, 1600 m, in forest litter, Picea , Fagus , Betula (V.I.Gusarov) , 25.vi.2001; 8 specimens, Blue Ridge Parkway, 18 km E Weaverville, 35º42.78’N 82º21.89’W, 1720 m, in forest litter, Picea , Betula (V.I.Gusarov) , 25.vi.2001 (all – KSEM and SPSU); Yancey Co.:, Black Mountains, vii; 2, 4, Mt. Mitchell, 14001800 m (E.D.Quirsfeld), 1724.vi.1939 (all – AMNH); 141 specimens, Mt.Mitchell (W.Suter), 12.vi.1973; 73 specimens, Mt.Mitchell near Blue Ridge Parkway, 1500 m (W.Suter), 17.vi.1973; 118 specimens, Mt.Mitchell, 1700 m (S.Peck), 9.iv.1967;, Mt.Mitchell, balsam fir litter above spring near summit (W.Suter), 31.v1973 (all – FMNH); 20 specimens, 16 km S Burnsville, Mt.Mitchell State Park, N slope of Mt. Mitchell, 35°46.19’N 82°15.97’W, 1920 m, in forest litter, Abies (V.I.Gusarov) , 25.vi.2001; 15 specimens, 21 km S Burnsville, Road 128, 35°43.42’N 82°16.97’W, 1600 m, in forest litter, Picea , Abies , Betula , Acer (V.I.Gusarov) , 25.vi.2001 ,, ditto but 35°43.32’N 82°17.29’W, 3.vi.2001; 15 specimens, Road 128, 19 km S Burnsville, Mt.Mitchell State Park, 35°44.71’N 82°16.83’W, 1800 m, in forest litter, Picea , Betula (V.I.Gusarov) , 25.vi.2001; 6 specimens, Road 128, 17 km S Burnsville, Mt.Mitchell, 35°45.92’N 82°16.26’W, 1920 m, in forest litter, Abies (V.I.Gusarov) , 25.vi.2001;, 17 km S Burnsville, Mt.Mitchell, near summit, 35°45.58’N 82°15.51’W, 2050 m, in forest litter, Picea rubens , Abies fraseri (V.I.Gusarov) , 3.vi.2001; Yancey Co. / Buncombe Co.: 19 specimens, 19 km S Burnsville, Blue Ridge Parkway, Balsam Gap overlook, 35°44.86’N 82°19.94’W, 1650 m, in forest litter, Picea , Abies , Betula , Acer (V.I.Gusarov) , 25.vi.2001 (all – KSEM and SPSU).
One of the paratypes of G. bicarinata listed by Lohse and Smetana (1988: 275) (not found in CNCI) must also belong to G. alticola (1 specimen, Buncombe Co.: base of Mt. Mitchell at Blue Ridge Parkway, about 1650 m (A.Smetana), 3.vi.1986). Two of the paratypes of G. carteriensis listed by Pace (1997: 106) (not examined) must also belong to G. alticola (2, Yancey Co.: Mt. Mitchell, 1800 m (P.Debs), 17.iv.1974). These assertions are based on the results of my extensive collecting efforts which demonstrated that G. bicarinata is restricted to the Great Balsam Mountains – Pisgah Ridge massif, G. carteriensis is restricted to the Bald Mountains and the Roan Mountain massif while G. alticola is the only species of Geostiba which occurs in the Great Craggy Mountains Black Mountains massif.
Mislabeled material., United States: Alabama: Blount Co.: 1 mi. SE Blount Springs (S.Peck), 5.iv.1967 ( FMNH). This male is identical with the types of G. alticola and other specimens from the Black Mountains massif in all external characters and in genitalia. Geostiba alticola is a wingless species restricted to the Great Craggy Mountains Black Mountains massif in the Southern Appalachians and occurs only above 1500 m. The altitude of the locality in Alabama is about 200 m. I consider the Alabama specimen to have been mislabeled. It is worth noting that four days later, on April 9, 1967, Stewart Peck collected a long series of G. alticola on the Mount Mitchell. Apparently one specimen was misplaced and mixed up with a sample from Alabama. Geostiba alticola does not occur in Alabama.
Diagnosis. Geostiba alticola can be distinguished from other Nearctic species of Geostiba by having small eyes (temple length to eye length ratio 3.85.0), pronotal pubescence of type V or VI, directed posteriorly in a wide medial zone (wider in males), not just along the midline, reduced wings, short elytra (pronotum length to elytron length ratio 1.3), the absence of carinae on abdominal tergum 7, the shape of the aedeagus ( Figs. 267275, 277 283 View FIGURES 267 270 View FIGURES 271 283 ) and the shape of the spermatheca ( Fig. 276 View FIGURES 271 283 ).
Geostiba alticola differs from closely related G. carteriensis in having longer and more narrow (in lateral view) apex of the median lobe of aedeagus ( Figs. 269270 View FIGURES 267 270 , 292 293 View FIGURES 289 293 ) and the lateral sides of the apex less convex (in ventral view) ( Figs. 267268 View FIGURES 267 270 , 289 291 View FIGURES 289 293 ).
Description. Length 1.92.4 mm. Body uniformly light brown, in some specimens abdominal segments 36 darker. Body parallelsided.
Head as wide as long, surface on disk with fine isodiametric microsculpture, puncturation very fine, distance between punctures equal to 24 times their diameter. Temple length to eye length ratio 3.85.0. Antennal article 2 longer than article 3, article 4 subquadrate, 510 transverse, last article as long as 9 and 10 combined.
Pronotum as wide as long, width 0.390.44 mm, wider than head (pronotal width to head width ratio 1.1); microsculpture and puncturation as on head; pronotal pubescence of type V or VI (directed posteriorly in wide medial zone (wider in males), not just along midline). Elytra measured from humeral angle shorter than pronotum (pronotal length to elytral length ratio 1.3), wider than long (1.5), with fine isodiametric microsculpture and fine asperate puncturation, distance between punctures equals 23 times their diameter. Elytral suture behind scutellum very slightly raised. Wings reduced to short vestiges, shorter than elytra.
Abdominal terga with fine microsculpture of transverse meshes, with fine and sparse puncturation, puncturation becoming finer towards abdomen apex, on terga 35 distance between punctures equals 25 times their diameter. Tergum 7 without white edge.
Males with stronger impression on disc of head and along midline of pronotum than females. Male tergum 7 without carinae. Posterior margin of male tergum 8 slightly convex ( Fig. 262 View FIGURES 262 266 ). Posterior margin of male sternum 8 convex ( Fig. 263 View FIGURES 262 266 ).
Posterior margin of female tergum 8 convex ( Fig. 264 View FIGURES 262 266 ). Posterior margin of female sternum 8 concave medially ( Figs. 265266 View FIGURES 262 266 ).
Aedeagus as in Figs. 267275, 277283 View FIGURES 267 270 View FIGURES 271 283 . Apex of median lobe in lateral view strait ( Figs. 269270 View FIGURES 267 270 ), in ventral view apex outline emarginate basally ( Figs. 267268 View FIGURES 267 270 ). Distal diverticula of internal sac narrow ( Figs. 274275, 281282 View FIGURES 271 283 ).
Spermatheca as in Fig. 276 View FIGURES 271 283 .
Distribution. Known only from the Great Craggy Mountains – Black Mountains massif ( Figs. 338339 View FIGURE 338 View FIGURE 339 ).
Natural History. Geostiba alticola was collected in forest litter at altitudes above 1500 m in leaf litter mostly in pure conifer or mixed forest with red spruce ( Picea rubens ) and/or Fraser’s fir ( Abies fraseri ).
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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Geostiba (Sibiota) alticola Lohse & Smetana, 1988
Gusarov, Vladimir I. 2002 |
Geostiba alticola
Lohse 1988: 271 |
Geostiba bicarinata:
Pace 1997: 106 |
Lohse 1988: 273 |