Heth pivari n. sp. (Nematoda: Ransomnematoidea: Hethidae) from the indigenous North American millipede Narceus gordanus (Spirobolida: Spirobolidae), with keys for worldwide Heth spp. Author Phillips, Gary 0000-0003-1930-1009 Department of Entomology and Plant Pathology, University of Tennessee, 370 Plant Biotechnology Building, 2505 E J Chapman Drive, Knoxville, TN 37996 - 4560 USA. & https: // orcid. org / 0000 - 0003 - 1930 - 1009 Author Moulton, John K. 0000-0001-8760-3274 Department of Entomology and Plant Pathology, University of Tennessee, 370 Plant Biotechnology Building, 2505 E J Chapman Drive, Knoxville, TN 37996 - 4560 USA. & https: // orcid. org / 0000 - 0001 - 8760 - 3274 Author Bernard, Ernest C. 0000-0003-3359-1516 Department of Entomology and Plant Pathology, University of Tennessee, 370 Plant Biotechnology Building, 2505 E J Chapman Drive, Knoxville, TN 37996 - 4560 USA. & https: // orcid. org / 0000 - 0003 - 3359 - 1516 text Zootaxa 2020 2020-10-20 4861 4 486 514 journal article 9031 10.11646/zootaxa.4861.4.2 a15b3af7-16c7-492b-bf7b-d08a36b7f6a2 1175-5326 4416659 8B330C85-5B40-48EF-8C17-48332637C1C9

TABLE 3. Morphometric measurements of Heth pivari n. sp. males.

	Allotype	Paratype Males (n = 30) Mean SD		Range	CV
Measurements (µm)
Length	2,075	2,253	280	1,897–2,997	12.4
Maximum width	130	137	29	99–198	21.2
Esophagus length	596	622	28	567–681	4.5
Basal bulb length	138	135	3.1	130–144	2.3
Head to excretory pore	250	264	19	236–290	7.2
Ventral sucker length	20	22.5	3	18–29	13.3
Ventral sucker width	15	15.9	2.7	9–22	17
Ventral sucker to cloaca	219	248	32	202–330	12.9
Spicule arc	102	109	6.4	96–124	5.9
Gubernaculum arc	50	66	5.1	53–79	7.7
Cloaca head	1,916	2,086	271	1,752–2,815	13
Tail length	159	167	15	137–202	9
Ratios
a	16	16.8	2.5	13–24	14.9
b	3.9	3	0.35	2.6–3.9	11.7
c	13	13.5	1.4	11–17	10.4
c’	92	93	0.73	91–94	0.8