Table 1 in First Records Of The Eastern Red Bat (Lasiurus Borealis) In Arizona, Utah, And Western New Mexico

Table 1. Summary of skull and external measurements (mm) for male Eastern Red Bats (Lasiurus borealis; n = 5) and male Western Red Bats (Lasiurus frantzii; n = 8) used in this study as reference specimens (see Appendix for specimen details), along with measurements of four individuals originally suspected and subsequently confirmed to be Eastern Red Bats from western parts of North America in Arizona, New Mexico, and Utah. GSL represents greatest skull length (not including teeth). Maxillary toothrow was measured from posterior border of upper M3 to anterior border of canine. M3 represents upper last molar and M1 represents upper first molar. Zygomatic breadth represents greatest width across lateral borders of zygomatic processes. Dentary length was measured from posterior border of mandible to anterior border of dentary (not including incisors). Total length of skin and tail length was taken from measurements recorded on skin tag by collector. Forearm length was measured by us from dry study skins. MSB represents the Museum of Southwestern Biology, Albuquerque, New Mexico whereas BYU represents the M. L. Bean Life Science Museum at Brigham Young University, Provo, Utah. NM stands for New Mexico, AZ stands for Arizona, and UT stands for Utah. GSLMaxillary toothrowWidth upper M3Width upper M1Zygomatic breadthDentary lengthTotal length skinTail lengthForearm length dryEastern Red BatsAverage12.524.441.341.579.289.37102.847.238.10Range11.98–12.984.30–4.711.18–1.571.42–1.789.04–9.609.31–9.5397–11144–5335.42–39.40Western Red BatsAverage11.694.051.221.458.768.7710546.639.01Range11.42–11.903.92–4.201.13–1.291.29–1.548.52–9.208.49–9.1196–11743–5236.30–40.20Questioned batsMSB 296442 (NM)12.614.671.481.769.489.971164239.97MSB 30894 (NM)12.004.521.491.749.289.50944035.90MSB 161561 (AZ)11.994.491.381.519.299.661004937.15BYU 13319 (UT)12.294.271.411.579.059.19/9.33a954438.03 aSpecimen has different lengths for each side of dentary, thus both sides are reported; the larger side has an expanded area of ossified bone possibly representing a prior injury.