Showing papers by "Roy C. Anderson published in 1993"
1,091 citations
TL;DR: The following were found in shorebirds collected during late April and early May shortly after their arrival in Iceland; the new genus resembles Syncuaria, but males have an area rugosa and small caudal alae, females are didelphic and the vulva is distant from the anus.
Abstract: The following were found in shorebirds collected during late April and early May shortly after their arrival in Iceland. Voguracuaria lankesteri n. g., n. sp. was found in the oesophagus of eight of 20 whimbrels Numenius p. phaeopus. The new genus resembles Syncuaria, but males have an area rugosa and small caudal alae, females are didelphic and the vulva is distant from the anus. Also, Syncuaria spp. occupy the gizzard rather than the oesophagus. Skrjabinocerca europaea n. sp. was found in the oesophagus of six of 22 ringed plovers Charadrius h. hiaticula (type-host) and in one dunlin Calidris alpina schinzii. The new species is readily distinguished by the presence of a cuticular flange at the distal end of the left spicule, its slightly recurrent cordons and its longer right spicule. “Skrjabinocerca prima” previously reported from American avocets Recurvirostra americana in North America is recognised as a distinct species and named S. americana n. sp. Ancyracanthopsis shikhobalovi found in the gizzard of whimbrels and Viktorocara charadrii found in the gizzard of ringed plovers are redescribed. Other nematodes found in the birds were Chevreuxia revoluta, Cosmocephalus capellae, C. obvelatus, Echinuria sp., Streptocara sp., Ancyracanthopsis parvialatus, Schistorophus cornutus, S. cirripedesmi, Sciadiocara bihamata, Viktorocara limosae, Microtetrameres sp., Tetrameres sp., Stellocaronema skrjabini and Porrocaecum semiteres.
9 citations
TL;DR: The significance of precocity in the transmission of heteroxenous parasitic nematodes is reviewed and, whenever possible, related to the behaviour of definitive and intermediate hosts during transmission is outlined.
Abstract: The significance of precocity in the transmission of heteroxenous parasitic nematodes is reviewed. Precocity of nematodes in intermediate hosts manifests itself in the following ways depending on the species: (i) the unusually large size of the infective larva; (ii) the advanced development of the genital primordium in the infective larva; (iii) development to the fourth stage in the intermediate host; and (iv) development to the subadult stage (early fifth stage) in the intermediate host. Precocity apparently accelerates gamete and egg production in the definitive host when the behaviour of intermediate and definitive hosts restricts transmission to confined limits of space and time. Examples of precocity are outlined and, whenever possible, related to the behaviour of definitive and intermediate hosts during transmission.
7 citations
5 citations
TL;DR: A redescription is provided of Spirura infundibuliformis from the stomach of ground squirrels, Spermophilus richardsonii, in southern Alberta, Canada.
Abstract: A redescription is provided of Spirura infundibuliformis from the stomach of ground squirrels, Spermophilus richardsonii, in southern Alberta, Canada; Spirura leucurusi Babero, 1973 is regarded as ...
3 citations
TL;DR: A third-stage larva of Anisakis sp.
Abstract: A third-stage larva ofAnisakis sp. was found coiled and encapsulated on the mesentery of a 168 cm long coelacanth female (CCC no. 154) examined at Guelph in 1992. The larva was 8.4 mm in length and 300 μm in maximum width. The oesophagus was 820 μm and the ventriculus about 310 μm in length (Fig. 1a). The prominent excretory pore was 21 μm from the cephalic extremity (Fig. 1b). The tail was 105 μm in length and was terminated by a minute mucron (Fig. 1c). The larva is readily identified by the asymmetrical elevations on the cephalic extremity, the prominent excretory pore and duct near the cephalic extremity and the presence of a ventriculus.
1 citations