68 COMPARATIVE PARASITOLOGY, <strong>67</strong>(1), JANUARY <strong>2000</strong> Copyright © 2011, The Helminthological Society of Washington
increase in the number of cuticular ridges, (2) rotation of the axis of orientation, and (3) lengthening of the genital cone. This line was divided into 3 genera: Carolinensis in the Palearctic Region, Hassalstrongylus in the Nearctic Region, and Stilestrongylus in the Neotropical Region. But evolution being gradual, the generic separations are necessarily arbitrary, and the geographic localities overlap in the Americas. Carolinensis is also present in North America, and Hassalstrongylus is present in South America. The phyletic position of the new species is interesting since it possesses some characteristics of the genus Hassalstrongylus: a high number of cuticular ridges (13-16 in Carolinensis vs 19-25 in Hassalstrongylus), disappearance of the gradient of size of the cuticular ridges, which tends to an equalization of their size and the appearance of a new symmetry in relation to the axis of orientation, and a relatively developed genital cone. According to Durette-Desset (1974), Hassalstrongylus musculi (Dikmans, 1935) was an example of an intermediary species between the genera Hassalstrongylus and Stile strongylus. Carolinensis tuffi seems to be an intermediary between the genera Carolinensis and Hassalstrongylus. The species Boreostrongylus romerolagi Gibbons and Kumar (1980) was described from a Mexican lagomorph, Romerolagus diazi (Ferrari Arez, 1893), and was automatically transferred to the genus Carolinensis, since Boreostrongylus was considered a synonym of Carolinensis by Durette-Desset (1983). However, this species is very different from the other species of the genus and can be classified in the genus Paraheligmonella Durette-Desset, 1971, particularly because of its synlophe: the left and right ridges are hypertrophied; a lateromedial gradient in the size of the ridges is present; and the axis of orientation is inclined 45° to the sagittal axis (Gibbons and Kumar, 1980). We thus propose a new combination: Paraheligmonella romerolagi (Gibbons and Kumar, 1980) comb. n. (=Boreostrongylus romerolagi Gibbons and Kumar, DURETTE-DESSET AND SANTOS—CAROLINENSIS TUFF/ SP. N. 69 1980; = Carolinensis romerolagi (Gibbons and Kumar, 1980), Durette-Desset, 1982). Acknowledgments We wish to thank Drs. D.W. Tuff, J.T. Baccus, and J.M. Kinsella for their advice during the course of this study and comments on the manuscript. Additional thanks are due to Dr. Baccus for obtaining permission from the Texas Parks and Wildlife Department for use of the study site, obtaining the scientific collecting permit, and securing funding for the collection of the specimens. Thanks are due to Kevin Schwausch, T Wayne Schwertner, and Todd Pilcik for assistance in trapping and handling rodents and to the staff of Colorado Bend <strong>State</strong> Park, especially Robert Basse. Literature Cited Dikmans, G. 1935. New nematodes of the genus Longistriata in rodents. Journal of Parasilology 25: 72-81. Durette-Desset, M. C. 1969. Etude du systeme des aretes cuticulaires de trois Nematodes Heligmosomes: Longistriata kinsellai n.sp., L. seurati Travassos et Darriba, 1929, L. hokkaidensis Chabaud, Rausch, et Desset, 1963, parasites de Rongeurs. Annales de Parasitologie Humaine et Comparee 44:617-624. . 1971. Essai de classification des Nematodes Heligmosomes. Correlations avec la paleobiogeographie des holes. Memoires du Museum National d'Histoire Naturelle, Nouvelle serie, Serie A, Zoologie 69:1-126 . 1974. Nippostrongylinae (Nematoda: Heligmosomidae) nearctiques. Annales de Parasitologie Humaine et Comparee 49:435-450. . 1983. Keys to Genera of the Super-Family Trichostrongyloidea. CIH Keys to the Nematode Parasites of Vertebrates, No. 10, R.C. Anderson, and A.G. Chabaud, eds. Commonwealth Agricultural Bureau, Farnham Royal, Buckinghamshire, England, 1-86. . 1985. Trichostrongyloid nematodes and their vertebrate hosts. Reconstruction of the phylogeny of a parasitic group. Advances in <strong>Parasitology</strong> 24: 239-306. , and A. G. Chabaud. 1981. Nouvel essai de Figures 1-8. Carolinensis tuffi sp. n. in Peromyscus pectoralis from Texas, drawings based on paratypes. 1. Male, anterior extremity, right lateral view. 2. Female, head, apical view. 3. Female tail, disappearance of cuticular ridges. 4. Female, posterior extremity, left lateral view. 5. Male synlophe at mid body. 6. Female synlophe at mid body. 7. Male, genital cone and membrane, ventral view. 8. Male, caudal bursa, ventral view. V = ventral side; R = right side. Scales in micrometers. Copyright © 2011, The Helminthological Society of Washington
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January 2000 Number 1 Comparative P
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Comp. Parasitol. 67(1). 2000 pp. 1-
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children. This means, to most of th
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liese, 1995; Marcogliese and Cone,
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ural and human alterations of ecosy
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ternationally and locally; (2) be i
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justify the inclusion of parasites
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phy to understand faunal structure
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Eucestoda) coincided with the diver
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Table 1. Previous helminth records
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hyrae from a collection of lizards.
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WEST ET AL.—RESEARCH NOTES 123 Ta
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1987, and from these only a sample
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snakes are part of their diet. The
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Comp. Parasitol. 67(1), 2000 pp. 12
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Table 2. Published records of helmi
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, , B. K. Sullivan, and Q. A. Truon
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were larvae. Still, we have conclud
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and their habitats. These low paras
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e eligible for election to office.
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New business. Presentation of notes
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Name: MEMBERSHIP APPLICATION 143 AP
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*Edna M. Buhrer *Mildred A. Doss *A