Paradeontacylix sp.

Hutson, Kate S. & Whittington, Ian D., 2006, Paradeontacylix godfreyi n. sp. (Digenea: Sanguinicolidae) from the heart of wild Seriola lalandi (Perciformes: Carangidae) in southern Australia, Zootaxa 1151 (1), pp. 55-68 : 63

Paradeontacylix sp. ( Fig. 2B )

Material studied: single specimen from the heart of S. lalandi (Carangidae) from Killarney, Victoria (38º23’36’’S, 142º20’24’’E) and a single specimen from the heart of S. hippos (Carangidae) from Greenly Island, offshore from Port Lincoln, South Australia (34º38’29’’S, 134º47’28’’E).

Infection details: number of infected S. lalandi (at Killarney) = 1; prevalence 4%; intensity 1; host sizes 760 FL (460–790 FL, n = 25). This kingfish was also parasitised by a specimen of P. godfreyi n. sp. (see above). Number of infected S. hippos (at Greenly Island) = 1; prevalence 25%; intensity 1; host sizes 1160 FL (1120–1160 FL, n = 4). This Samson fish was also parasitised by a specimen of P. sanguinicoloides (see above).

Material deposited: 1 voucher specimen from S. lalandi from Killarney, Victoria ( SAMA AHC 28911) and 1 voucher specimen from S. hippos from Greenly Island, South Australia ( SAMA AHC 28912).

Remarks

Parasite specimens collected from the heart of S. lalandi at Killarney, Victoria and S. hippos at Greenly Island, South Australia were identified as an undetermined Paradeontacylix species. Further identification or formal description was precluded because of the limited number (n = 2) and quality of the specimens recovered. The single specimen from S. hippos is in good condition and the testicular field can be distinguished, but it is difficult to count the testes. Although the large posterior and transverse marginal tegumental spines are well preserved in the single specimen from S. lalandi , the internal features are difficult to distinguish. Both specimens possess large, pointed, slightly curved posterior tegumental spines 24 (11–39, n = 24) long arranged in 4 longitudinal rows each comprising 3 spines ( Fig. 2B , Table 1) and have a maximum number of 14–15 marginal tegumental spines in each transverse row (Table 1). Because of these similarities, we consider that these 2 specimens from different Seriola species belong to the same species, which may represent an undescribed Paradeontacylix species.

Figures

FIGURE 2. Large posterior tegumental spines (lpts) and medium posterior tegumental spines (mpts), ventral view of Australian Paradeontacylix species. A. Paradeontacylix godfreyi n. sp, holotype, showing claw­like large posterior tegumental spines arranged in 4 longitudinal rows each comprising 4 spines and medium posterior tegumental spines arranged in 2 to 3 longitudinal rows each comprising 4 spines on either side of large posterior tegumental spines. B. Paradeontacylix sp. (SAMA AHC 28912) showing pointed, slightly curved large posterior tegumental spines arranged in 4 longitudinal rows each comprising 3 spines and medium posterior tegumental spines arranged in 3 longitudinal rows each comprising 3 spines on either side of large posterior tegumental spines. Scale bars = 30 m.