January 1996 v" \r 1 =-- . 'C , .''--' ,. -r "• : ' -•-''. ' JOURNAL of The Helmintholpgical Society of Washington; ; , A semiannual journal of research devoted to -.'' ^ Helminthology and all branches of Parasitology ^Supported in part by the Brayton H. Ransom Memorial Trust Fund , '-v CONTENTS v _ -E. J:\yETZEL AND G. W. ESCH- Influence of Odonate Intermediate Host Ecology on the'lnfection Dynamics of Halipegus spp., Haematoloechus loitgiplexus, and Hae- matoloechus complexus (Trematoda: Djgenea) ..___ .... .. ..::. _., 1 E THOMAS, T- DEMEECs, AND E RENAUD. Pattern of Infection of Gammarus aequi- cauda (Amphipoda) with Metacercariae of Levinseniella tridigitata (Trematoda: jMicrophallidae) L „..:.. '.'.. ...y. „'„._ . lv_. J_ — 8 D., J. MARCOGLIESE. Larval Parasitic Nematodes Infecting Marine Crustaceans in Eastern Canada. 3. Hysterothylacium aduncum .„_...__ _xli l...r. „._ - 12 --S. MORAND, E. S. INANOVA, AND-C. VAUCHER. Dicelis keymeri sp. n. (Nematoda:- Drilonematidae) from the Earthworm Octolasium pseudptranspadanum Zicsi, / 197r;(Oligochaeta: Lumbricidae) '. ..;.....„._£: ^.^:_^...,.^..........^ .... ;19 R. A. FioRibLO AND W. E FONT. ^Helminth Community Structure of Four Species of '•f Lepomis (Osteichthyes: Centrarchidae) from an Oligohalirie Estuary in South- eastern Louisiana . -_^_1 Li-« . 24 O. M. AMIN AND M. D. DAILEY. Redescription of Dollfiisentis iieteracanthus (Acan- / thocephala:; Illiosentidae) from Bonefish, Albula vulpes, in^^ the West Indies ... 31 D. C: KRITSKY, L. R. VAN;.EVERY, ANETW. A. BOEGER. Nedtropical Monogenoidea. 27. Two New Species of Telethecium gen. n. from the Nasal Cavities of Central ; ^Amazonian Fishes and a Redescription-of Kritskyia moraveci Kohn, 1990 (Dae- •' -~ tylogyridae, Ancyrbcephiilinae) J I. ..I.". 35 R. B. TUCKER AND J. E. JOY. Relationships Between Glypthehnins pennsylvaniensis .- (Trematoda: Digeiiea) Infections and Host Size '. _..... .___: :ll_... L;.. 42 PURNOMO AND M. J. BANGS. Icosiella'iiitani sp. n. (FHarioidea: Onchoeercidae), a Parasite of Ratio cancrivora from South Kalimantan, Indonesia .... , 47 C. R.-BURSEY AND S. R. GOLDBERG. Pharyngodon lepidodactylus sp. n. (Nematoda: ', Pharyngpdonidae) from the Mourning Gecko, Lepidodactylus lu-gubris (Lacertilia: : ,. Gekkonidae), from Hawaii;.. .II _„.... ..._ .^..... 1:_... 51 1 ' (Continued on Outside Back Cover) Copyright © 2011, The Helminthological Society of Washington THE SOCIETY meets in October, November, February, April and May for the presentation and discussion of papers in any and all branches of parasitology or related sciences. All interested persons . are invited to attend. ,. _ -._•-' Persons interested in membership in the Helminthological Society of Washington may obtain ap- plication blanks-in recent issues of THE JOURNAL. A year's subscription to the Journal is included in the annual dues of $20.00 domestic and $22.00 foreign. 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Copyright © 2011, The Helminthological Society of Washington J. Helminthol. Soc. Wash. 63(1), 1996, pp. 1-7 Influence of Odonate Intermediate Host Ecology on the Infection Dynamics of Halipegus spp., Haematoloechm longiplexus, and Haematoloechus complexus (Trematoda: Digenea) ERIC J. WETZEL AND GERALD W. ESCH Department of Biology, Wake Forest University, P.O. Box 7325, Winston-Salem, North Carolina 27109 ABSTRACT: The prevalences and relative densities of Halipegus spp., Haematoloechus longiplexus, and Hae- matoloechus complexus metacercarial infections in anisopteran (dragonfly) and zygopteran (damselfly) odonate intermediate hosts were examined. These measures of infection were compared in relation to the ecological habits of the host species. Also, the extent of second intermediate host specificity was compared between the 2 species of Haematoloechus. Eighteen species (N = 934) of odonates were dissected and examined for metacer- cariae. Halipegus spp. generally had the highest prevalences and relative densities of infection when compared with Haematoloechus spp. in this system. Except for 1 host species, no significant differences in levels of infection were found between the 2 species of Haematoloechus in anisopterans. Haematoloechus longiplexus was a second intermediate host specialist, being found in anisopteran odonates only. In contrast, Haematoloechus complexus was a generalist and was found in both anisopteran and zygopteran hosts. Differences in infections among host species suggest that variations in odonate ecology are sufficient to influence the suitability of larval odonates to serve as intermediate hosts for these frog trematodes. KEY WORDS: Halipegus spp., Haematoloechus longiplexus, Haematoloechus complexus, odonate, host spec- ificity. Bush et al. (1993) argued for the increased con- ceans (the second intermediate host) (Thomas, sideration of invertebrate intermediate hosts 1939). Thomas concluded that metacercariae when investigating parasitic helminth commu- would then reside in the host's stomach until the nity dynamics. Traditionally, vertebrate defini- tadpole metamorphosed into an adult frog, at tive hosts have received most of the attention in which time the worm would migrate up the these analyses (Esch et al., 1990), although com- esophagus to the eustachian tubes, where it would munity studies of intramolluscan trematodes mature and live as an adult (Thomas, 1939). have received considerable attention recently However, unpublished field data from our lab- (Kuris, 1990;Sousa, 1990, 1993; Fernandez and oratory on the recruitment of this parasite into Esch, 199la; Williams and Esch, 1991; Snyder its definitive host (R. clamitans) suggest that H. and Esch, 1993; Esch and Fernandez, 1994; Laf- eccentricus metacercariae also can be found in ferty et al., 1994). Few studies have concentrated odonates, which presumably act as third inter- on parasites in invertebrate second or third in- mediate hosts. This would make the life cycle of termediate hosts, i.e., those that have a closer H. eccentricus similar to that of its congener, H. ecological association with the definitive host, occidualis. Thus, in habitats such as Charlie's because the parasites rely on predator-prey path- Pond, where both congeners could be present ways for transmission. within larval odonates, and because they are Halipegus occidualis Stafford, 1905, is a hem- morphologically indistinguishable, they are re- iurid trematode that uses odonate (Insecta: Odo- ferred to as Halipegus spp. for the purposes of nata; i.e., dragonfly and damselfly) naiads as third this study. intermediate hosts. Naiads infected with meta- Haematoloechus complexus Seely, 1906, and cercariae are ingested by the green frog, Rana H. longiplexus Stafford, 1902, are frog lung flukes clamitans, in