02224nas a2200277 4500008004100000022001400041245020800055210006900263260001500332300001200347490000900359520131100368653001301679653001701692653001701709653001401726653001801740653000801758653002301766653001301789653001301802100001901815700002201834700002401856856006601880 2020 eng d a1175-532600aHeth pivari n. sp. (Nematoda: Ransomnematoidea: Hethidae) from the indigenous North American millipede Narceus gordanus (Spirobolida: Spirobolidae), with keys for worldwide Heth spp.0 aiHeth pivarii n sp Nematoda Ransomnematoidea Hethidae from the i c20/10/2020 a486-5140 v48613 a

Forty-four specimens of the millipede Narceus gordanus Chamberlin, 1943 (Spirobolida: Spirobolidae) were collected from Alachua, Citrus, Hernando, and Marion counties in peninsular Florida. Morphometric data were recorded for each. Nematodes were dissected from the intestine of each individual and sorted into morphotaxa. Heth pivari n. sp. (Oxyuridomorpha: Ransomnematoidea: Hethidae) was found in 33 (75%) of dissected N. gordanus and examined with brightfield, differential interference contrast, phase contrast and scanning electron microscopies. LSU rDNA sequences of representative males and females of H. pivari n. sp. were analyzed and compared to sequences of nematodes in the infraorder Rhigonematomorpha. Heth mauriesi, an introduced species, also was sequenced. Females of H. pivari n. sp. differ from those of other Heth spp. in having smooth, button-like somatic and cervical papillae and shallow, shield-like cervical collars. Males have slit-like or narrowed, rather than circular, stomal openings. Heth pivari n. sp. is the first species of this genus found in an indigenous millipede north of Mexico. Keys based on female cervical ornamentation are provided to differentiate the 52 known Heth spp.

10a28S rDNA10abiogeography10acommensalism10aDiplopoda10aHeth mauriesi10akey10amolecular analysis10aNematoda10aTaxonomy1 aPhillips, Gary1 aMoulton, John, K.1 aBernard, Ernest, C. uhttps://www.biotaxa.org/Zootaxa/article/view/zootaxa.4861.4.2