Discovery and Description of the “Davtiani” Morphotype for Teladorsagia boreoarcticus (Trichostrongyloidea: Ostertagiinae) Abomasal Parasites In Muskoxen, Ovibos moschatus, and Caribou, Rangifer tarandus, from the North American Arctic: Implications for Parasite Faunal Diversity

Hoberg, Eric P.; Abrams, Arthur; Pilitt, P. A.; Kutz, Susan

doi:10.1645/ge-2898.1

Cited by 6 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is especially true in groups such as parasitic nematodes, where genus diagnosis is frequently based on male morphology (i.e. Nematoda, Oxyurida: Ainsworth, ; Rhabditida: Hoberg et al ., ). For example, in oxyurid nematodes, Ainsworth () identified male dimorphism in two species of Skrjabinodon nematodes, with morphological differences between male morphs consistent between the two species.…”

Section: Introductionmentioning

confidence: 97%

“…For example, in oxyurid nematodes, Ainsworth () identified male dimorphism in two species of Skrjabinodon nematodes, with morphological differences between male morphs consistent between the two species. Male dimorphism is also quite common in Ostertagiinae nematodes (Hoberg & Abrams, ; Grillo et al ., ; Hoberg et al ., ). In one representative of this group, Teladorsagia circumcincta , the frequency of morphological polymorphism is primarily density dependent, with minor male morphs more likely to occur in high intensity infections, their intensity being positively correlated with that of the larger morph (Craig et al ., ).…”

Section: Introductionmentioning

confidence: 97%

“…Alternative male phenotypes have been reported for a variety of species across different taxa, from invertebrates (i.e. arthropods: Buzatto et al ., ; nematodes: Hoberg et al ., ) to vertebrates (i.e. birds: Horton et al ., ; fishes: Cogliati et al ., ; reptiles: Calsbeek et al ., ).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evolution of alternative male morphotypes in oxyurid nematodes: a case of convergence?

Jorge

Perera

Roca

et al. 2014

J of Evolutionary Biology

View full text Add to dashboard Cite

Male dimorphism has been reported across different taxa and is usually expressed as the coexistence of a larger morph with exaggerated male traits and a smaller one with reduced traits. The evolution and maintenance of male dimorphism are still poorly understood for several of the species in which it has been observed. Here, we analyse male dimorphism in several species of reptile parasitic nematodes of the genus Spauligodon, in which a major male morph (exaggerated morph), which presents the traditional male morphological traits reported for this taxon, coexists with a minor morph with reduced morphological traits (i.e. reduced genital papillae) resembling more closely the males of the sister genus Skrjabinodon than Spauligodon major males. Because of the level of uncertainty in the results of ancestral state reconstruction, it is unclear if the existence of male dimorphism in this group represents independent instances of convergent evolution or an ancestral trait lost multiple times. Also, although the number of major males per host was positively correlated with the number of females, the same did not hold true for minor males, whose presence was not associated with any other ecological factor. Nevertheless, the existence of male dimorphism in Spauligodon nematodes is tentatively interpreted as resulting from alternative reproductive tactics, with differences in presence and number of individuals as indicators of differences in fitness, with the lower numbers of minor males per host likely maintained by negative frequency-dependent selection.

show abstract

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Evolution of alternative male morphotypes in oxyurid nematodes: a case of convergence?

Jorge

Perera

Roca

et al. 2014

J of Evolutionary Biology

View full text Add to dashboard Cite

show abstract

“…The genus Teladorsagia mainly complicates the taxonomy of parasitic nematodes, which indicates the need for further research in this area. Even less is known about the occurrence of cryptic species in other frequently occurring representatives of the Ostertagiinae, especially in M. marshalli due to its presence in several host species (Lichtenfels & Pilitt, 1989; Hoberg et al , 2012a, b). Similar doubts may also be related to the genus Ostertagia .…”

Section: Discussionmentioning

confidence: 99%

“…Hoberg et al (1999), who have focused primarily on the biodiversity among Arctic nematodes, also dealt with the polymorphism in Teladorsagia spp. They suggested that T. boreoarcticus Hoberg, Monsen, Kutz & Blouin, 1999 is dimorphic, but later the ‘davtiani’ morphotype for T. boreoarcticus was found (Hoberg et al , 2012a). Consequently, three morphotypes were recognized: (i) the major morph; (ii) minor morph A; and (iii) minor morph B, with the differences resembling those demonstrated between T. trifurcata and T. davtiani morphotypes of T. circumcincta (table 1).…”

Section: Overview Of Polymorphic Speciesmentioning

confidence: 99%

Insight into species diversity of the Trichostrongylidae Leiper, 1912 (Nematoda: Strongylida) in ruminants

2015

View full text Add to dashboard Cite

This paper focuses on the species diversity among the Trichostrongylidae Leiper, 1912 (Nematoda: Strongylida), and complexity of the family systematics. Polymorphism (subfamilies: Ostertagiinae, Cooperiinae and Haemonchinae), the presence of cryptic species (genus: Teladorsagia) and hybridization (genera: Cooperia, Haemonchus and Ostertagia) are presented and discussed, considering both morphological and molecular evidence. Some of these phenomena are common, nevertheless not sufficiently understood, which indicates the need for expanding the current state of knowledge thereof. Within the Trichostrongylidae, species distinction supported merely by morphological features is difficult, and requires confirmation by means of molecular methods. The parasitic nematode taxonomy is complicated mainly by the genus Teladorsagia, but complexity may also be expected among other Ostertagiinae (e.g. in the genera Ostertagia and Marshallagia). The data presented here show that the members of the Trichostrongylidae can significantly complicate unambiguous species identification. Hence, it is essential to consider the phenomena mentioned, to gather valid and comparable data on the biodiversity of this family.

show abstract

Parasites in Ungulates of Arctic North America and Greenland

Kutz

Ducrocq

Verocai

et al. 2012

Advances in Parasitology

View full text Add to dashboard Cite

Discovery and Description of the “Davtiani” Morphotype for Teladorsagia boreoarcticus (Trichostrongyloidea: Ostertagiinae) Abomasal Parasites In Muskoxen, Ovibos moschatus, and Caribou, Rangifer tarandus, from the North American Arctic: Implications for Parasite Faunal Diversity

Cited by 6 publications

References 32 publications

Evolution of alternative male morphotypes in oxyurid nematodes: a case of convergence?

Evolution of alternative male morphotypes in oxyurid nematodes: a case of convergence?

Insight into species diversity of the Trichostrongylidae Leiper, 1912 (Nematoda: Strongylida) in ruminants

Parasites in Ungulates of Arctic North America and Greenland

Contact Info

Product

Resources

About