Goezeella danbrooksi de Chambrier, Rego & Mariaux, 2004

Philippe V. Alves, Alain de Chambrier, José L. Luque & Tomáš Scholz, 2017, Reappraisal of Goezeella Fuhrmann, 1916 (Cestoda: Proteocephalidae), parasites of Neotropical catfishes (Siluriformes), with description of a new species from Pimelodella cristata (Heptapteridae), Revue suisse de Zoologie 124 (2), pp. 335-350 : 342

Goezeella danbrooksi de Chambrier, Rego & Mariaux, 2004

Figs 20, 21

Goezeella siluri . – Brooks & Deardorff, 1980: 15.

Holotype: USNM 1370061 (USNPC 74498), a wholemounted specimen (2 slides) – USNM 1370107 (USNPC 74544), fragments on 19 slides of serial cross- and frontal sections.

Type and only known locality: Magdalena River near San Cristóbal, Province of Bolívar, Colombia.

Type and only known host: Ageneiosus pardalis Lütken (= A. caucanus Steindachner ) ( Siluriformes : Auchenipteridae ).

Site of infection: Anterior intestine.

Prevalence of infection: Unknown.

Morphological

description:

Brooks

&

Deardorff

(1980).

Remarks: The description of this species, which was originally identified as G. siluri by Brooks & Deardorff (1980), was based on a single specimen, which is partially decomposed. However, de Chambrier et al. (2004a) observed several morphological differences between this specimen and G. siluri , such as the position of the vitelline follicles, which are ventrolateral in G. danbrooksi (vs. only ventral in G. siluri ), fewer testes (183-310 vs. 380-430), and the position of the vaginal sphincter (at a distance from the genital atrium in G. danbrooksi vs. terminal, i.e. close to the genital atrium in G. siluri ). Based on these differences, de Chambrier et al. (2004a) proposed the new name, G. danbrooksi , for the tapeworm from A. pardalis .

Brooks & Deardorff (1980) reported the vitelline follicles to be present both in the ventral and dorsal cortex. However, the study of the holotype including its histological sections revealed that the follicles are only on the ventral side of the cortex, reaching only to its lateral margin ( Figs 20, 21 ).

The study of the type material of G. danbrooksi also showed that some fibres of the inner longitudinal musculature are close together, thus somewhat resembling muscle bundles ( Figs 20, 21 ). However, the tissue of histological sections is partially decomposed and thus a new, well fixed material of the species has to be examined to reveal the actual structure of the inner longitudinal muscles of G. danbrooksi .

Figures

Figs 20 - 21. Goezeella danbrooksi de Chambrier, Rego & Mariaux, 2004 ex Ageneiosus pardalis (holotype, USNM 1370061). (20) Cross-section at middle part of proglottid. (21) ovary level. Abbreviations: do – dorsal osmoregulatory canal; lm – internal longitudinal musculature; ov – ovary; st – subtegumental muscle fibres; su – subtegumental cells; te – testes; tg – tegument; ut – uterus; vi – vitelline follicles; vo – ventral osmoregulatory canal.