Neurisothrips saki, Mound, 2020

Mound, Laurence A., 2020, Diversity in the Hawaiian endemic genus Neurisothrips (Thysanoptera, Thripidae), Zootaxa 4779 (2), pp. 215-229 : 226

publication ID	https://doi.org/ 10.11646/zootaxa.4779.2.4
publication LSID	lsid:zoobank.org:pub:7EB0A1A9-3F04-4ADB-9387-494010AFECFA
DOI	https://doi.org/10.5281/zenodo.3851285
persistent identifier	https://treatment.plazi.org/id/0392C25E-FFE6-FFF9-DA9A-FF2D26E52D55
treatment provided by	Plazi
scientific name	Neurisothrips saki
status	sp. nov.

Treatment

Neurisothrips saki View in CoL sp. n.

( Figs 10, 14 View FIGURES 1–14 , 21 View FIGURES 15–23 , 30 View FIGURES 24–32 , 37 View FIGURES 33–38 , 49 View FIGURES 39–49 )

Female. Body and legs mainly light brown, all tarsi and fore tibiae yellowish; antennae mainly brown, segments III variable brownish yellow; fore wing and clavus brown ( Fig. 10 View FIGURES 1–14 ) but with broad sharply pale area distal to clavus apex extending fully across wing. With the character states of the genus: Head transverse with mouth cone long and extending beyond the fore coxae ( Fig. 37 View FIGURES 33–38 ); ocellar setae pair III long, po setae pair I absent, pair IV slightly longer than an ocellus ( Fig. 14 View FIGURES 1–14 ). Pronotum transversely reticulate, one pair of anteromarginal setae, 3–5 discal setae, midlateral pair long. Mesonotum with narrow transverse reticulations. Metanotal median setae arise behind anterior margin ( Fig. 21 View FIGURES 15–23 ), sculpture transverse at anterior, medially with converging closely spaced striae. Fore wing veinal setae relatively widely spaced, about 14 on first vein and 11 on second vein ( Fig. 10 View FIGURES 1–14 ). Tergites with irregular transverse reticulation laterally, without a group of setae; tergite X without a longitudinal split.

Measurements (holotype female in microns). Body length 1060. Head, length 35; width across eyes 115; ocellar setae III 60; po setae IV 20. Pronotum, length 100; width 160; pa setae 55. Metanotum median setae length 30. Fore wing length 600. Antennal segments III–VII length 40, 35, 35, 40, 23.

Male. Similar to female but smaller; tergite IX median setal pair arising posterior to lateral setae and to campaniform sensilla; sternites III–VII with small circular pore plate medially ( Fig. 30 View FIGURES 24–32 ).

Measurements (paratype male in microns). Body length 900. Ocellar setae III 45; po setae IV 15. Pronotal pa setae 40.

Specimens examined. Holotype female, Hawaii , Volcano National Park (19° 25’N, - 155° 17’W), from Cibotium expanding crozier, 6.vii.2016 (A.Wells), in BPBM. GoogleMaps

Paratypes: 6 females 2 males taken with holotype; Hawaii, Toms Trail, 7 females beaten from vegetation including Cibotium , 9.vii.2016. Oahu, Kaala Summit, 14 females from Cibotium expanding croziers, 29.vii.2016 (LAM 6315); Puu Lanipo Trail, from Cibotium chamissoi terminals, 2 females 2 males, 18.xi.1945, 2 females, 22.v.1946 (Sakimura); Mt Tantalus , 2 females from Cibotium chamissoi terminals, 30.vi.1946 (Sakimura).

Comments. In addition to the type series listed above, there are further specimens of this species from Cibotium fronds in the Bishop Museum (slide-mounted by F.A.Bianchi), and in the USNM collection at Beltsville, Maryland (slide-mounted by J.D.Hood). Although most specimens studied are brown, the mid and hind tibiae are yellow in some specimens. However, a few specimens have been studied in which the body is largely yellow, with light brown shadings on the head, metanotum and tergite III, and antennal segments I–II clear yellow. It is possible that these yellow individuals represent a further new species, but both colour forms have been found on the Puu Lanipo Trail, Oahu. Since no structural differences can be found between them the yellow and brown individuals are here considered to be conspecific. This species is particularly unusual within the genus, for the longitudinally striate metanotum ( Fig. 21 View FIGURES 15–23 ), the few discal setae laterally on the abdominal tergites ( Fig. 49 View FIGURES 39–49 ), the unusually long mouth cone, and the habit of living on the very young tissues of a tree fern .