Amblycorypha carolina Spooner & Forrest, 2023

Forrest, Timothy G., Scobie, Micaela, Brueckner, Olivia, Bintz, Brittania & Spooner, John D., 2023, Geographic variation in the calling songs and genetics of Bartram's round-winged katydid Amblycorypha bartrami (Tettigoniidae, Phaneropterinae) reveal new species, Journal of Orthoptera Research 32 (2), pp. 153-170 : 153

Amblycorypha carolina Spooner & Forrest sp. nov.

Figs 2 , 7 -16

Material examined. -

Holotype: USA • ♂; South Carolina, Georgetown, Hobcaw Barony, Kings Rd ; 33.3480°N, 79.227°W; 5 Jun. 2009; T.G. Forrest and L.D. Block leg.; Anb-M04-2009; DNA (MS-034) NCBI accession SAMN31929333; REC (2009 Tape02 PGM 1023); UNCA to be transferred to FSCA.

Allotype: USA • ♀; South Carolina, Georgetown, Hobcaw Barony, Kings Rd ; 33.3480°N, 79.2271°W; 5 Jun. 2009; T.G. Forrest and L.D. Block leg.; Anb-F03-2009; DNA (MS-004) NCBI accession SAMN31929331; REC (2009 Tape02 PGM 1024 duet with M06), REC (2009 Tape02 PGM 1025 duet with M02); UNCA to be transferred to FSCA.

Paratypes: (16♂, 16♀) USA • 1♀, 1♂; South Carolina, Aiken Co ; 14 May 2008; J.D. Spooner leg.; UNCA to be transferred to FSCA • 1♀; South Carolina, Aiken Co ; 24 May 2008; J.D. Spooner leg.; UNCA to be transferred to FSCA • 1♀, 1♂; South Carolina, Aiken Co ; 30 May 2008; J.D. Spooner leg.; UNCA to be transferred to FSCA • 2♀, 3♂; South Carolina, Aiken Co ; 4 Jun 2008; J.D. Spooner leg.; UNCA to be transferred to FSCA • 1♂; South Carolina, Aiken Co ; 27 May 2019; T.G. Forrest leg.; UNCA to be transferred to FSCA • 2♀, 1♂; South Carolina, Edgefield Co ; 21 May 2008; J.D. Spooner leg.; UNCA to be transferred to FSCA • 3♂; South Carolina, Edgefield Co ; 24 May 2010; J.D. Spooner leg.; UNCA to be transferred to FSCA • 6♀, 1♂; South Carolina, Edgefield Co ; 5 Jun. 2007; J.D. Spooner leg.; UNCA to be transferred to FSCA • 3♀, 5♂; South Carolina, Georgetown Co ; 5 Jun. 2009; T.G. Forrest and L.D. Block leg.; UNCA to be transferred to FSCA .

Other specimens. -

4♂, 4♀ from Walker et al. 2003: USA • 2♂; South Carolina, Aiken Co; 17 Jun. 68; J.D. Spooner leg.; FSCA • 1♀; South Carolina, Aiken Co; 10 Jul. 87; J.D. Spooner leg.; FSCA • 1♂; South Carolina, Aiken Co; 7 Jun. 88; J.D. Spooner leg.; FSCA • 1♂; South Carolina, Aiken Co; 21 Jun. 88; J.D. Spooner leg.; FSCA • 1♀; South Carolina, Aiken Co; 14 Jun. 93; J.D. Spooner leg.; FSCA • 1♀; South Carolina, Aiken Co; 21 Jun. 93; J.D. Spooner leg.; FSCA • 1♀; South Carolina, Edgefield Co; 7 Jun. 88; J.D. Spooner leg.; FSCA.

Size measurements (mm). -

Holotype: PrnL: 6.1, PrnW: 4.4, TegL: 28.0, TegW: 8.9, HwEx: 2.2, FemL: 28.2, and TibL: 29.7 mm ( Fig. 16 ). Allotype: PrnL: 6.7, PrnW: 4.4, TegL: 26.4, TegW: 7.5, HwEx: NA, FemL: 28.9, TibL: 29.0, OviL: 8.8.

Etymology. -

This species is named for its geographic location within South Carolina, north of the Savannah River and south of the Pee Dee River.

Common name. -

Carolina round-winged katydid.

Differential diagnosis. -

Members of this species are best distinguished from other members of the Amblycorypha rotundifolia species group and from A. bartrami , in particular by calling song. Syllable rates as a function of temperature are ~5.8s-1 at 25°C ( Fig. 8 ) and differ from all other eastern members of the Amblycorypha rotundifolia complex. Although the syllable rates of A. carolina are similar to A. parvipennis from the western USA, A. carolina have significantly longer tegminal lengths and hindwing exposure (Table 2 ). Calling songs of A. carolina have a sustained series of about 25 syllables compared to more than 100 syllables in the sustained portion of songs from Florida A. bartrami ( Fig. 7 ). Series that preceded the main, sustained series also tend to have fewer syllables than Florida A. bartrami (2-4 vs 5-6, respectively Fig. 7 ).

Description. -

Individuals are typically green and have all attributes of members of the Amblycorypha rotundifolia complex of Amblycorypha ( Walker et al. 2003). Female size measurements (x -̄ ± SE in mm, N) are on average PrnL: 6.60 ± 0.07, 17; PrnW: 4.12 ± 0.08, 17; TegL: 26.6 ± 0.47, 13; TegW: 8.12 ± 0.25, 15; FemL: 27.6 ± 0.40, 15; TibL: 28.7 ± 0.40, 14; OviL: 9.93 ± 0.25, 17. Males size measurements are on average PrnL: 6.03 ± 0.09, 17; PrnW: 4.00 ± 0.09, 17; TegL: 26.2 ± 0.44, 17; TegW: 8.21 ± 0.17, 17; FemL: 27.1 ± 0.42, 15; TibL: 28.2 ± 0.34, 15 (Table 2 ). Male calling songs are composed of several series of single syllables with initial series having 2 to 4 syllables leading up to a sustained final series with about 25 syllables ( Figs 2 , 7 ). During the sustained portion of the final series the syllable rates are about ~5.8s-1 at 25°C. Syllable rates change with temperature following the linear relationship: rate=0.293(temp)-1.467 ( Fig. 8 ).

Figures

Fig. 2. A-C. Oscillograms (30 s) of calling songs of 3 male A. nr bartrami from Aiken Co., South Carolina. Songs consist of a long duration, sustained main series of syllables preceded by several shortduration series of 1 - 5 syllables; D. Oscillogram of 15 syllables highlighted in C; E. Oscillogram and spectrogram showing the fine temporal structure and frequency content of 3 syllables highlighted in D.

Fig. 7. Mean (+ / - SE) number of syllables as a function of the temporal relationship between series in male calling song from populations of supposed Amblycorypha bartrami (GA & AL: green, NC: blue, FL: red, SC: orange) and A. parvipennis (black). Triangles (X = 0) represent the mean number of syllables in the sustained main series of songs averaged over the number of males shown in parentheses. Circles are the means for each series preceding the main series with the number of males contributing to the average indicated in parentheses.

Fig. 8. Syllable rate as a function of temperature for populations of Amblycorypha bartrami (GA & AL: green, NC: blue, FL: red, AL: pink, SC: orange) and A. parvipennis (black). Solid symbols are recordings from our research and open symbols are recordings from other published work (Walker et al. 2003 for A. bartrami and A. parvipennis, Shaw et al. 1990 for A. parvipennis).

Fig. 16. Holotype of Amblycorypha carolina, Carolina round-winged katydid. A. Dorsal view; B. Lateral view. Scale bars: 5 mm.