Dolichodorus heterocephalus

Zeng, Yongsan, Ye, Weimin, Tredway, Lane, Martin, Samuel & Martin, Matt, 2012, Taxonomy and morphology of plant-parasitic nematodes associated with turfgrasses in North and South Carolina, USA, Zootaxa 3452, pp. 1-46 : 16

Dolichodorus heterocephalus

( Fig. 4 F–I)

Measurements. See Table 7 .

Remarks. Dolichodorus heterocephalus was described from specimens collected from fresh water at Silver Springs, Florida, and Douglas Lake, Michigan, by Cobb (1914). It was reported from Massachusetts ( Paracer 1968) and New Jersey ( Hutchinson et al. 1961). It is also known from South Africa ( Heyns 1971) and Italy (D'Errico et al. 1977). Golden et al. (1986) designated a lectotype of D. heterocephalus and presented detailed morphometric data from its type locality and several other populations including ones from Sanford and Gainesville, Florida, and East Wareham, Massachusetts, which revealed some differences in morphometrics among populations. Perry (1953) reported that D. heterocephalus caused severe stunting accompanied by depleted root systems of celery and corn in Florida. In the current study, D. heterocephalus was only found in a bermudagrass tee in Beaufort County, SC. The morphological features did not differ from the original and other populations ( Cobb 1914; Orton Williams 1974b). The morphometrics of the identified population matched the type population in Gainesville, Florida ( Golden et al. 1986), except for a slightly smaller range in body lengths for males and females, and a greater a value for females. This is the first record of D. heterocephalus from turfgrasses in SC.

Figures

FIGURE 4. Micrographs of Belonolaimus longicaudatus and Dolichodorus heterocephalus from turfgrasses in NC and SC. All scale bars = 20 µm. A. Pharyngeal region of B. longicaudatus. B. Vulva region of B. longicaudatus. C. Female tail of B. longicaudatus. D, E. Male tails of B. longicaudatus. F. Pharyngeal region of D. heterocephalus. G. Vulval region of D. heterocephalus. H. Female tail of D. heterocephalus. I. Male tails of D. heterocephalus.