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1 April 2013 A New Species of Trichosomoididae (Nematoda) from Skin of Red Snapper, Lutjanus campechanus (Perciformes: Lutjanidae), on the Texas–Louisiana Shelf, Northern Gulf of Mexico
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Abstract
Eggs and larvae of Huffmanela oleumimica n. sp. infect red snapper, Lutjanus campechanus (Poey, 1860), were collected from the Texas–Louisiana Shelf (28°16′36.58″N, 93°03′51.08″W) and are herein described using light and scanning electron microscopy. Eggs in skin comprised fields (1–5 × 1–12 mm; 250 eggs/mm2) of variously oriented eggs deposited in dense patches or in scribble-like tracks. Eggs had clear (larvae indistinct, principally vitelline material), amber (developing larvae present) or brown (fully developed larvae present; little, or no, vitelline material) shells and measured 46–54 μm (x̄ = 50; SD ± 1.6; n = 213) long, 23–33 (27 ± 1.4; 213) wide, 2–3 (3 ± 0.5; 213) in eggshell thickness, 18–25 (21 ± 1.1; 213) in vitelline mass width, and 36–42 (39 ± 1.1; 213) in vitelline mass length with protruding polar plugs 5–9 (7 ± 0.6; 213) long and 5–8 (6 ± 0.5; 213) wide. Fully developed larvae were 160–201 (176 ± 7.9) long and 7–8 (7 ± 0.5) wide, had transverse cuticular ridges, and were emerging from some eggs within and beneath epidermis. The new species differs from its congeners by having eggs <65 μm in total length and that have a brown eggshell when fully developed, an envelope throughout development, and irregularly-dispersed eggshell spines plus a larva >110 μm long with transverse cuticular ridges. The eggs lack a spindle-shaped envelope, polar filaments, and eggshell ridges. This is the first report of a species of Huffmanela from a snapper (Lutjanidae) or from the Gulf of Mexico. A table of egg and larval characteristics, hosts, and localities for Huffmanela spp. is provided.
Carlos F. Ruiz, Candis L. Ray, Melissa Cook, Mark A. Grace and Stephen A. Bullard "A New Species of Trichosomoididae (Nematoda) from Skin of Red Snapper, Lutjanus campechanus (Perciformes: Lutjanidae), on the Texas–Louisiana Shelf, Northern Gulf of Mexico," Journal of Parasitology 99(2), (1 April 2013). https://doi.org/10.1645/GE-3249.1
Received: 24 June 2012; Accepted: 1 September 2012; Published: 1 April 2013
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