Sphedanolestes albipilosus, Ishikawa, Tadashi, Cai, Wanzhi & Tomokuni, Masaaki, 2007
|
publication ID |
https://doi.org/ 10.5281/zenodo.175172 |
|
DOI |
https://doi.org/10.5281/zenodo.6248687 |
|
persistent identifier |
https://treatment.plazi.org/id/03B0B778-E96C-FF9F-FF79-FD8BFA30B78D |
|
treatment provided by |
Plazi |
|
scientific name |
Sphedanolestes albipilosus |
| status |
sp. nov. |
Sphedanolestes albipilosus View in CoL sp. nov.
( Figs. 1–7 View FIGURE 1 View FIGURE 2 View FIGURE 3 – 7 )
Male. Body ( Fig. 1 View FIGURE 1 ) mostly blackish, covered with whitish decumbent setae on head and thorax. Venter of head, lateral areas anterior to eyes, longitudinal stripe on anterior lobe of head, small spot between ocelli, humeri and lateral margins of pronotum, middle along posterior margin of pronotum, apex of scutellum, and lateral areas of coxal cavities pale yellow. Antennae dark brown. Rostrum yellowish brown, darkened at base of first segment. Coxae and trochanters dark brown, brownish yellow ventrally; femora yellowish brown, with both ends dark; tibiae brown, darkened apically, each with an inconspicuous pale annulation subbasally; tarsi dark. Hemelytra ( Fig. 1 View FIGURE 1 ) brown, with yellow bases. Abdomen pale yellow, with dark longitudinal stripe on each side; second laterotergite with brown spot; fifth, sixth, and seventh laterotergites each with a dark spot. Pygophore pale yellow, with elliptic spots laterally and longitudinal dark stripe ventrally.
Head ( Fig. 3 View FIGURE 3 – 7 ) covered with erect setae intermixed with short, decumbent setae, about 1.7 times as long as width across eyes, about 1.1 times as long as pronotum; anteoculus 0.83 times as long as postoculus. Eyes 0.5 times as wide as interocular space in dorsal view. Proportional lengths of first to fourth antennal segments 7: 3: 3: 4, those of first to third rostral segments 7: 10: 2.
Pronotum ( Fig. 3 View FIGURE 3 – 7 ) 0.85 times as long as humeral width, slightly protuberant posteriad at posterior angles, with a conical tubercle on each anterolateral angle; anterior lobe 0.6 times as long as posterior lobe, with some linear markings composed of short, decumbent setae; posterior lobe furnished with erect setae intermixed with short, decumbent setae, and with straight posterior margin. Hemelytra ( Fig. 1 View FIGURE 1 ) exceeding apex of abdomen by onetenth of its length; coria covered with short, decumbent setae. Legs furnished with fine, suberect setae intermixed with longer erect setae; fore femora densely covered with short erect setae ventrally.
Abdomen furnished with suberect and curved setae. Pygophore dorsoapically with pair of small, conical, apically obtuse projections ( Fig. 4 View FIGURE 3 – 7 ). Parameres weakly constricted at apical third, inwardly curved in apical part, rounded at apex, furnished with erect setae of variable length ( Fig. 5 View FIGURE 3 – 7 ). Phallus with a longitudinal sclerite ( Fig. 7 View FIGURE 3 – 7 , ls) on each ventrolateral side; endosoma provided basally with large, membranous, saclike lobe ( Figs. 6–7 View FIGURE 3 – 7 , msl) on each side, armed dorsobasally with pair of apically acute, spoonlike sclerites ( Figs. 6–7 View FIGURE 3 – 7 , ss), and with several conical projections in apical part.
Female. Almost the same as male ( Fig. 2 View FIGURE 2 ). Third antennal segment 0.8 times as long as second segment. Ninth abdominal tergite pale yellow, with a central dark marking. First valvifers darkened marginally; first valvulae blackish.
Measurements (mm; holotype, and paratypes in parentheses). Body length 8.75 (8.35–8.90 in males, n=29; 8.95–9.75 in females, n=25). Head length 1.85, width across eyes 1.08; length of anteoculus 0.62, of postoculus 0.72; antenna length 6.96; rostrum length 2.22. Length of pronotum 1.65, width across humeri 2.00; length of anterior pronotal lobe 0.60, of posterior pronotal lobe 1.04. Hemelytron length 5.90. Lengths of femur, tibia, and tarsus of proleg 3.00, 3.44, and 0.58; of mesoleg 2.77, 2.88, and 0.60; of metaleg 3.70, 4.55, and 0.66, respectively.
Type series. Holotype: ɗ (NSMTIHe7816), “[ Japan] the Ryukyus, Ishigakijima Is., Mt. Omotodake, 24. V. 2000, Tadashi Ishikawa” ( NSMT). Paratypes: Mt. Omotodake, Ishigakijima Is., Japan, 2ɗ (NSMTI He 7817, 7818, 2.vi.1973, Y. Kurosawa ( NSMT), 3Ψ, 17.v.1993, Y. Nakatani ( TUA), 2ɗ, 4Ψ, 2.vi.1999, T. Ishikawa ( TUA), 11ɗ, 9Ψ, 24.v.2000, T. Ishikawa ( CAU, TUA), 1Ψ, 24.v.2000, H. Mizushima ( TUA), 1ɗ, 1Ψ, 13.vi.2002, T. Tsuru ( TUA), 3ɗ, 1Ψ, 11.vi.2003, T. Ishikawa ( TUA), 8ɗ, 4Ψ, 6.v.2003, T. Kurihara ( ELEU). Nadaragawa Riv., Iriomotejima Is., Japan, 1Ψ, 9.v.1998, K. Takahashi ( TUA); Funaura, Iriomotejima Is., Japan, 1ɗ (NSMTIHe 7819), 18.iv.1998, K. Takahashi ( NSMT). Habong, Nantou Hsien, Taiwan, 1Ψ, 22.vii.1994, K. Matsumoto ( TUA).
Distribution. Japan, Ryukyu Islands (Ishigakijima Is., Iriomotejima Is.); China, Taiwan (Nantou Hsien).
Remarks. In general appearance, this new species is very similar to Sphedanolestes subtilis ( Jakovlev, 1893) known from mainland China, but it can be distinguished from the latter by the body shorter than 10.0 mm, the fourth antennal segment distinctly longer than the third segment, the abdomen with a dark longitudinal stripe only on each side; in S. subtilis , the body is a little longer, ranging 10.0–11.0 mm, the fourth antennal segment is as long as the third segment, and dark transverse stripes are present on the abdomen beneath throughout.
Biology. Despite of the repeated surveys made by our colleagues and ourselves almost throughout the Ryukyu Islands, Sphedanolestes albipilosus has been found exclusively from Mt. Omotodake in Ishigakijima Island and, with the exception of two individuals from Iriomotejima Island. On Mt. Omotodake the adults appear only in a short period from May to June within an extremely restricted area around the top (526 m alt.), where they were often found on leaves of trees and grasses under plentiful sunshine. It is likely that the population density of this species is maintained relatively high at least in this area.
Etymology. From the Latin, albipilosus , referring to the white setae on the head and thorax; an adjective.
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.