Geostiba (Sibiota) graveyardensis Pace, 1997,
publication ID |
http://doi.org/ 10.5281/zenodo.155701 |
publication LSID |
lsid:zoobank.org:pub:B36587A1-248A-4194-8424-46C9BBA15606 |
persistent identifier |
http://treatment.plazi.org/id/5B50E916-FF85-393D-4D2D-FBEDFE81FE5C |
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Plazi |
scientific name |
Geostiba (Sibiota) graveyardensis Pace, 1997 |
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3. Geostiba (Sibiota) graveyardensis Pace, 1997 ( Figs. 7293View FIGURES 72 76View FIGURES 77 80View FIGURES 81 93)
Geostiba (Ditroposipalia) graveyardensis Pace, 1997: 102 .
Material. UNITED STATES: North Carolina: Haywood Co.: 2 specimens, Graveyard Fields at Blue Ridge Parkway, 22 km SE Waynesville, right bank of the river, 35 ° 19.2 'N 82 ° 50.7 'W, 1550 m, in forest litter by the river, Picea , Betula , Rhododendron (V.I.Gusarov), 20.ix. 2001; 48 specimens, Black Balsam Knob Road N of Blue Ridge Parkway, 21 km SSE Waynesville, 35 ° 19.1 'N 82 ° 52.6 'W, 1800 m, in forest litter, Picea (V.I.Gusarov) , 20.ix. 2001 (all KSEM and SPSU).
Type locality. UNITED STATES: North Carolina: Haywood Co.: Graveyard Fields at Blue Ridge Parkway ( Pace 1997).
Diagnosis. Geostiba graveyardensis can be distinguished from other Nearctic species of Geostiba by having small eyes (temple length to eye length ratio 2.83.8), pronotal pubescence of type V, reduced wings, short elytra (pronotum length to elytron length ratio 1.3), the presence of two short parallel carinae in the middle of abdominal tergum 7 in front of posterior margin, the shape of the aedeagus ( Figs. 77 85, 87 93View FIGURES 77 80View FIGURES 81 93) and the shape of the spermatheca ( Fig. 86View FIGURES 81 93).
Geostiba graveyardensis is closely related to G. bicarinata but differs in the following: the apex of median lobe in lateral view bent ventrally ( Figs. 79 80View FIGURES 77 80, 59 60View FIGURES 57 60), in ventral view with apical process ( Figs. 77 78View FIGURES 77 80, 57 58View FIGURES 57 60).
Description. Length 1.92.3 mm. Brown or dark brown, elytra and apex of abdomen often lighter, antennae light brown, legs and mouthparts brownish yellow. Body parallelsided.
Head as wide as long, surface on disk with fine isodiametric microsculpture, puncturation very fine, distance between punctures equal to 34 times their diameter. Temple length to eye length ratio 2.83.8. Antennal article 2 longer than article 3, article 4 slightly transverse, 510 transverse, last article longer than 9 and 10 combined (as in Fig. 16View FIGURES 8 17).
Pronotum slightly transverse, width 0.410.44 mm, width to length ratio 1.1, wider than head (pronotal width to head width ratio 1.2); microsculpture and puncturation as on head. Pronotal pubescence of type V. 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 slightly raised in both sexes. 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 37 times their diameter. Tergum 7 without white edge.
Male tergum 7 with two medial carinae in front of posterior margin. Male tergum 8 with two or four weak and short carinae in front of posterior margin, posterior margin convex ( Fig. 72View FIGURES 72 76). Male sternum 8 with convex posterior margin ( Fig. 73View FIGURES 72 76).
Female tergum 8 with convex posterior margin ( Fig. 74View FIGURES 72 76), posterior margin of sternum 8 concave medially ( Figs. 7576View FIGURES 72 76).
Aedeagus as in Figs. 77 85, 87 93View FIGURES 77 80View FIGURES 81 93. Apex of median lobe in ventral view with apical process ( Figs. 7778View FIGURES 77 80), in lateral view bent ventrally ( Figs. 7980View FIGURES 77 80), distal diverticula of internal sac with numerous denticles ( Figs. 81, 84, 9192View FIGURES 81 93), in ventral view narrow ( Figs. 8485View FIGURES 81 93), in lateral view broad ( Figs. 9192View FIGURES 81 93).
Spermatheca as in Fig. 86View FIGURES 81 93.
Distribution. Known from the Graveyard Ridge and Black Balsam Knob in the Great Balsam Mountains – Pisgah Ridge massif (North Carolina) ( Figs. 338View FIGURE 338, 340View FIGURE 340).
Natural History. Geostiba graveyardensis was collected by sifting forest litter at altitudes from 1500 m to 1800 m in pure conifer or mixed forest with red spruce ( Picea rubens ).
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) graveyardensis Pace, 1997
Gusarov, Vladimir I. 2002 |
Geostiba (Ditroposipalia) graveyardensis
Pace 1997: 102 |