The Teratology of Spicules in Some Trichostrongyline Nematodes (Family Trichostrongylidae Leiper, 1912)

Revision of the genus Haemonchus Cobb, 1898 (Nematoda: Trichostrongylidae)

“…Almeida (1933;1935) pointed out that H. lunatus Travassos, 1914 was probably an anomalous form of H. contortus. Becklund (1960), Andrews (1970) and Santiago (1973) have discussed the anomalies of the spicules of H. contortus and other trichostrongyles. Becklund (1960) agreed with Almeida (1933;1935) and synonymized the two species.…”

Host-dependent variation in the morphology of female Ostertagia circumcincta (Stadelmann, 1894) Ransom, 1907, a nematode parasite of sheep

“…Structural changes in male worms may be less dramatic but Lancaster (1968), from reports as well as his own personal observations, found that there is variability of the genital cone in the genus Ostertagia s. str. Spicules also have shown varying degrees of aberrant development (for example, see Andrews, 1970). Taken in conjunction with the natural morphometric changes it is perhaps not surprising that some worms do not appear to fit the known criteria and become recorded as a new species, at least for a time.…”

A host-parasite checklist of helminths of wild ruminants in New Zealand

“…As far as the health of wild ruminants in New Zealand is concerned, the role of helminth parasites has not been an important one nor, as indica ted by Andrews (1969b), has the presence of these parasites yet posc:d a serious threat to the health of domestIc ruminants. However, the farming of some wild ruminant species has become more widespread in recent years and this, together with the potential these, animals have for harbouring domestic stock parasites, indicates the need for some further additions to the literature on the parasites of wild ruminants in this country.…”

“…Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. Terms & Conditions of access and use can be found at http://www.tandfonline.com/page/terms-and-conditions INTRODUCTION THE available literature on parasites of wild ruminants in New Zealand has tended to aim at a particular host species or a particular group of parasites -e.g., Sweatman and Williams ( 1962) on the taeniids of wild ruminants, Andrews (1964) on the arthropod and helminth parasites of red deer. The present work arises from a broader study of the parasites of wild ruminants, pa~ts of which have already been pubhshed (Andrews, 1969a(Andrews, , b, 1970a.…”

“…Terms & Conditions of access and use can be found at http://www.tandfonline.com/page/terms-and-conditions INTRODUCTION THE available literature on parasites of wild ruminants in New Zealand has tended to aim at a particular host species or a particular group of parasites -e.g., Sweatman and Williams ( 1962) on the taeniids of wild ruminants, Andrews (1964) on the arthropod and helminth parasites of red deer. The present work arises from a broader study of the parasites of wild ruminants, pa~ts of which have already been pubhshed (Andrews, 1969a(Andrews, , b, 1970a. The fir~t of these papers, a key to the wild rummant parasites, will be complemented by the present work which consists of a checklist and notes on cross-infection between wild and domestic ruminants.…”