A New Montane Species of Spiny Pocket Mouse (Rodentia: Heteromyidae: Heteromys) from Northwestern Costa Rica Author Anderson, Robert P. Author Timm, Robert M. text American Museum Novitates 2006 2006-03-16 3509 1 1 39 http://www.bioone.org/perlserv/?request=get-abstract&doi=10.1206%2F0003-0082(2006)3509%5B1%3AANMSOS%5D2.0.CO%3B2 journal article 3674 10.1206/0003-0082(2006)3509[1:ANMSOS]2.0.CO;2 2f8c7065-6e4b-46b1-89af-809f51afdcf2 0003-0082 4735318

TABLE 2 Descriptive Statistics for Adults in Age Class 4 of Heteromys desmarestianus from La Selva and H. nubicolens from Monteverde and Cerro Cacao in Northwestern Costa Rica a

	La Selva	Monteverde	Cerro Cacao
a Mean ± standard error, sample size, and observed range (minimum–maximum) are given for external measurements, mass, cranial measurements, and three derived ratios. Units are millimeters unless otherwise noted. La Selva (localities 18, 19), Monteverde (localities 30–32; all on the Pacific slope or crest of the Cordillera de Tilarán), and Cerro Cacao (locality 28) constituted the geographic samples (see appendix 1).
Total length	265, 1	318.9 ± 4.1, 17	329.3 ± 3.5, 15
	(265)	(291–347)	(300–351)
Head-and-body length	131, 1	143.2 ± 2.2, 27	150.3 ± 1.5, 15
	(131)	(104–163)	(140–158)
Tail length	134, 1	175.1 ± 2.6, 17	179.1 ± 2.7, 15
	(134)	(153–192)	(155–197)
Tail/head-and-body ratio, × 100 (%)	102.3, 1	122.8 ± 3.9, 17	119.2 ± 1.8, 15
	(102.3)	(105.1–179.8)	(106.9–131.4)
Hind foot length	35, 1	38.9 ± 0.3, 26	38.7 ± 0.4, 15
	(35)	(35–41)	(36–42)
Ear length	17, 1	17.8 ± 0.2, 27	18.3 ± 0.3, 14
	(17)	(16–21)	(17–20)
Mass (grams)	62, 1	79.4 ± 2.2, 26	104.9 ± 3.5, 14
	(62)	(61–109)	(90–136)
Occipitonasal length	36.512 ± 0.123, 121	38.346 ± 0.210, 28	39.183 ± 0.376, 13
	(32.71–39.74)	(36.48–40.49)	(35.72–41.02)
Zygomatic breadth	16.359 ± 0.059, 85	17.413 ± 0.110, 24	17.831 ± 0.227, 8
	(15.20–17.83)	(16.40–18.31)	(16.52–18.51)
Rostral length	16.590 ± 0.069, 121	17.786 ± 0.125, 27	18.270 ± 0.234, 13
	(14.51–18.45)	(16.61–19.29)	(15.82–19.11)
Nasal length	15.365 ± 0.070, 121	15.999 ± 0.154, 28	16.265 ± 0.213, 13
	(13.21–17.25)	(13.89–17.78)	(14.25–17.41)
Least interorbital constriction	9.919 ± 0.038, 121	9.222 ± 0.088, 28	9.419 ± 0.093, 13
	(8.75–11.11)	(8.37–10.19)	(8.78–10.04)
Squamosal breadth	15.449 ± 0.036, 121	15.971 ± 0.061, 28	15.746 ± 0.075, 13
	(14.40–16.35)	(15.43–16.61)	(15.19–16.26)
Maxillary toothrow length	5.237 ± 0.020, 121	5.516 ± 0.041, 28	5.268 ± 0.050, 13
	(4.63–5.78)	(5.02–5.85)	(4.97–5.51)
Interparietal width	9.270 ± 0.044, 121	9.906 ± 0.079, 28	9.425 ± 0.102, 13
	(8.03–10.23)	(9.14–10.84)	(8.88–10.00)
Interparietal length	5.274 ± 0.037, 121	4.858 ± 0.094, 28	4.999 ± 0.169, 13
	(4.29–6.40)	(3.82–5.98)	(3.94–6.11)
Parietal breadth	14.387 ± 0.038, 121	13.712 ± 0.064, 28	13.878 ± 0.092, 13
	(13.26–15.50)	(12.85–14.45)	(13.21–14.60)
Skull depth	11.212 ± 0.025, 121	11.636 ± 0.044, 28	11.635 ± 0.060, 13
	(10.43–11.99)	(11.00–12.09)	(11.07–11.88)
Least interorbital constriction/	27.171 ± 0.069, 121	24.045 ± 0.171, 28	24.048 ± 0.217, 13
occipitonasal length ratio, × 100 (%)	(25.20–28.79)	(22.41–26.06)	(22.76–25.48)
Parietal breadth/	39.429 ± 0.100, 121	35.787 ± 0.250, 28	35.444 ± 0.300, 13
occipitonasal length ratio, × 100 (%)	(36.68–41.56)	(32.63–38.94)	(33.69–37.34)