Neduba cascadia Cole, Weissman, & Lightfoot, 2021

Cole, Jeffrey A., Weissman, David B., Lightfoot, David C., Ueshima, Norihiro, Warchałowska-Śliwa, Elżbieta, Maryańska-Nadachowska, Anna & Chatfield-Taylor, Will, 2021, A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini), Zootaxa 4910 (1), pp. 1-92 : 42-44

publication ID

https://doi.org/ 10.11646/zootaxa.4910.1.1

publication LSID

lsid:zoobank.org:pub:69A0204C-15B4-4566-AA27-E3817087130A

DOI

https://doi.org/10.5281/zenodo.4465031

persistent identifier

https://treatment.plazi.org/id/039C87AE-7D5F-FFEC-FF47-03F27498FC29

treatment provided by

Plazi

scientific name

Neduba cascadia Cole, Weissman, & Lightfoot
status

sp. nov.

Neduba cascadia Cole, Weissman, & Lightfoot View in CoL , sp. n.

Fig. 9 View FIGURE 9 (distribution), Fig. 17 View FIGURE 17 (male and female habitus, calling song, male and female terminalia, karyotype), Plate 1 View PLATE 1 F–H (live habitus), Plate 4H View PLATE 4 (male calling song), Plate 7E View PLATE 7 (male ventral sclerite), Plate 11H View PLATE 11 (female subgenital plate).

Common name. Cascade Shieldback.

History of recognition. None.

Type material. HOLOTYPE MALE: USA, OR, Jackson Co., Wildcat Campground , Hyatt Lake Complex , Cascade-Siskiyou National Monument, 42.18283N, 122.44775W, 1531 m, 27-29-VII-2016, JA Cole, JAC000002023 [specimen barcode], DNA218 [genomic], SING0616 [DNA extraction], JCR160727_02 [recording], 125 [teeth], 3.7 [mm stridulatory file length], tegmen in gelcap below specimen, deposited in CAS, Entomology type #19708. GoogleMaps

PARATYPES (n = 12): 5♁, same data as holotype, LACM GoogleMaps ; 4♁, same data as holotype, CAS GoogleMaps ; 1♁, same data as holotype, JAC; 1♀ GoogleMaps , same data as holotype except 28-VIII-2019, DB Weissman & DC Lightfoot, CAS; 1♀ GoogleMaps , Woodruff Meadow , 30 mi. SW Crater L., 42.885125N, 122.509206W, 6-VIII-1960, JR Helfer, CAS GoogleMaps .

Measurements. (mm, ♁n = 7, ♀ n = 1) Hind femur ♁18.05–18.95 ♀ 19.91, pronotum total length ♁9.20–9.81, ♀ 8.85, prozona length ♁3.01–4.65, ♀ 4.55, metazona dorsal length ♁5.10–6.80, ♀ 4.30, pronotum constriction width ♁2.07–2.30, ♀ 2.55, metazona dorsal width ♁6.50–7.25, ♀ 6.49, head width ♁4.10–4.68, ♀ 5.02, ovipositor length ♀ 16.00.

Distribution. Southern Cascade and Siskiyou mountain ranges of southern Oregon.

Habitat. Understory and edges of coniferous forest.

Seasonal occurrence. Scant records are from mid-July through late August. Adult activity probably lasts from midsummer through fall until first frosts.

Stridulatory file. (n = 4) length 3.4–3.7 mm, 125–133 teeth, tooth density 36.7 ± 2.1 (33.8–38.8) teeth/mm.

Song. (n = 6) Typical Convexa Clade “zwee-zwee” song type but with a significantly slower PTR of 1.8± 0.1 s- 1 (ANCOVA P = 1.08×10 -5) and longer MPTL of 498.2 ± 65.5 ms (ANCOVA P = 4.27×10 -11) than all other Convexa Clade taxa. PTF is 13.9 ± 2.2 kHz.

Karyotype. (n=2) 2n♁ = 26 (2m + 22t + Xt +Yt) T19-16, S19-90, paratopotype.

Recognition. The male ventral sclerite of N. cascadia has a blunt apex with scattered large tubercles and a short lateral process that blends into the shaft by an obtuse angle. This contrasts with N. convexa and N. longiplutea , both distributed to the south, which have the ventral sclerite apex low if not flat and a long lateral process with numerous fine tubercles that are arranged in rows. N. steindachneri to the north has a mushroom-shaped ventral sclerite with few large tubercles and a blunt, recurved lateral process. The female subgenital plate is unique among the Convexa Clade in having straight apical margins. The slow PTR separates the song of N. cascadia from all other Carinata Group species; N. steindachneri to the north has the fastest PTR in this species Group.

Etymology. cascadia , reflecting the southern Cascade Range distribution.

Notes. The distribution of this species lies between that of N. steindachneri to the north and N. convexa to the south. Further studies are needed to determine the limits of the ranges of northern Carinata Group taxa. Museum specimens from intermediate localities are nymphs and are only tentatively identified as this species. The calling songs and genitalia of all three species differ, so sympatry may be expected if these differences confer reproductive isolation. That calling song extremes of PTR occur in two species with adjacent ranges suggests prezygotic reproductive isolation mediated by calling song.

Material examined. In addition to type material (above), QUESTIONABLE PLACEMENT (n = 3): USA, OR , Jackson Co., 2♀ nymphs, Little Applegate River , 42.198722N, 123.045356W, 701 m, 6-VIII-1950, B Malkin, CAS GoogleMaps ; 1♀ nymph, Union Creek , 42.906905N, 122.445598W, 7-31-VIII-1950, B Malkin, CAS GoogleMaps .

CAS

California Academy of Sciences

LACM

Natural History Museum of Los Angeles County

JAC

University of Jodhpur

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Orthoptera

Family

Tettigoniidae

Genus

Neduba

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