Hemicycliophora undetermined

Subbotin, Sergei A., Chitambar, John J., Chizhov, Vlamidir N., Stanley, Jason D., Inserra, Renato N., Doucet, Marcelo E., Clure, Michael M, Ye, Weimin, Yeates, George W., Mollov, Dimitre S., Cantalapiedra-Navarrete, Carolina, Vovlas, Nicola, Berg, Esther Van Den & Castillo, Pablo, 2014, Molecular phylogeny, diagnostics, and diversity of plant-parasitic nematodes of the genus Hemicycliophora (Nematoda: Hemicycliophoridae), Zoological Journal of the Linnean Society 171 (3), pp. 475-506 : 493

HEMICYCLIOPHORA SP. 10

( FIGS 1E, K, Q, S 17; TABLES 1, S8)

A mixed population of H. californica and an unidentified Hemicycliophora sp. 10 were found in one sample collected in California, USA. The latter species was characterized by a straight or ventrally arcuate body; cuticular sheath loosely fitting body, lateral fields marked anteriorly by anastomoses as slanted lines connecting transverse striae, followed by a single, sometimes continuous longitudinal line extending from base of pharyngeal bulb to vulva, then continuing as breaks and anastomoses on postvulval area. Outside lateral fields annuli usually smooth or sometimes marked with irregularly scattered, short lines or scratches. Lip region hemispherical and marked by two lip annuli, first lip annulus larger than second one, labial disc not protruding. Vulval lips modified, about one to 1.5 annulus in length. Postvulval body area not contracted or slightly contracted immediately posterior to vulva. Tail cylindrical, then abruptly conical in posterior quarter, tapering uniformly or slightly offset dorsally to a short spike with a finely rounded terminus, or pyramidal, acute terminus. Annulations distinct on tail terminus.

Hemicycliophora sp. 10 is similar to H. californica but differs from it by longer body length (1017–1026 vs. 780–980 μm) and larger R (253–277 vs. 210–266). This species is clearly different from H. californica in the ITS and D2-D3 of 28S rRNA gene sequences.

Figures

Figure 1. Photomicrographs of specimens of populations of selected Hemicycliophora species. A–F, anterior region; G–L, lateral field; M–R, posterior region. A, G, M, Hemicycliophora conida (Washington State, USA); B, H, N, Hemicycliophora sp. 3 (Arizona, USA); C, I, O, Hemicycliophora sp. 8 (California, USA); D, J, P, Hemicycliophora raskii (California, USA); E, K, Q, Hemicycliophora sp. 10 (California, USA); F, L, R, Hemicycliophora californica (California, USA). Scale bars: A–F, M–R = 10 μm; G–L = 5 μm.