Gryllus bryanti Morse

Weissman, David B. & Gray, David A., 2019, Crickets of the genus Gryllus in the United States (Orthoptera: Gryllidae: Gryllinae), Zootaxa 4705 (1), pp. 1-277 : 40-41

Gryllus bryanti Morse

Bahama Island Field Cricket

Figs 17 , 22 , Table 1

Although not known from the United States, this cricket is endemic to the Bahama Islands, which are less than 80 km away from the closest US location along the Florida coast. Since our earlier publication ( Weissman et al. 2019), we have documented this cricket on a third island in the Bahamas: San Salvador, 24.122279° -74.45678°, 23-i-2019, 1♂, N. Lee, deposited CAS.

Recognition characters and song. Known only from 3 islands in the Bahamas. Body color as in Fig. 22 . Song ( Fig. 22 ) at 25°C typically with widely spaced single pulses delivered at 7–15/10 seconds at a pulse rate of 0.8– 2.1.

DNA. GBM05, from Andros Island, multilocus appears ( Fig. 6 , p. 28 ) to be one of several Gryllus near the base of a continental North American species group, distinct from the Afro-Eurasian G. bimaculatus and G. campestris Linnaeus. We interpret this result cautiously, however, as we lack DNA samples for other geographically nearby species G. jamaicensis Walker , G. mandevillus Otte & Perez-Gelabert , and G. bermudensis Caudell (probably most closely related to G. firmus [ Kevan 1980]).

Figures

FIGURE 6. Phylogenetic arrangement of taxa redrawn from Gray et al. (2019). Taxa in grey text are either not considered here because they are not US Gryllus, or are considered only briefly (Pet Store Group; G. bryanti).

FIGURE 17. ITS2 gene tree. G. brevicaudus samples: S03-8 (G5); S16-1 (G3354, G3393); G. insularis samples: Guadalupe Island, Baja California Norte, Mexico; G. bryanti samples: Andros Island, Bahamas; G. alexanderi sample: Clarion Island, Colima, Mexico.

FIGURE 22. Left Panel: G. bryanti (on left) vs. sympatric G. assimilis (right), both from Bahamas. Note head wider than pronotum in G. bryanti. Right Panel: Three second waveform of typical single-pulse chirp calling song of G. bryanti (neotype male, GBM08, Andros Island, at 25 °C).

FIGURE 28. Five second waveforms of calling songs of (A) G. pennsylvanicus and (B) G. firmus. G. pennsylvanicus (R04-110) Whatcom Co., WA (S04-91), at 25°C. G. firmus: (R03-255) Gainesville, FL (S03-85), at 25°C.