Nybelinia Poche, 1926

Jr, Joaber Pereira & Boeger, Walter A., 2005, Larval tapeworms (Platyhelminthes, Cestoda) from sciaenid fishes of the southern coast of Brazil, Zoosystema 27 (1), pp. 5-25 : 10

Genus Nybelinia Poche, 1926

Nybelinia bisulcata ( Linton, 1889) ( Fig. 3A, B )

HOST. — Umbrina canosai (NH) (LH = 23.0-31.5; P = 3.45; MI = 1.25; MA = 0.04).

SITE OF INFECTION. — Coelomic cavity.

SPECIMENS DEPOSITED. — CHIOC 33788 a-b, 33789; MNHN-C-IX-144 (JJ 1014-8-1).

DESCRIPTION

Measurements (based on three specimens): scolex 1.86 ± 0.74 (1.05-2.53) long.Bothridia 0.92 ± 0.34 (0.55-1.23) long. Bulbs 0.46 ± 0.19 (0.25-0.62) long, 0.13 ± 0.06 (0.05-0.17) wide. Velum 0.23 ± 0.10 (0.12-0.31) long, appendix 0.44 ± 0.44 (0.25- 0.63) long. Hooks 13 μm ± 1.52 (12-15) long.

REMARKS

The adult of this species has a wide geographical distribution, having been previously recorded from the coast of Rio Grande do Sul in Notorhynchus pectorosus (Garman, 1884) by São Clemente et al. (1991) and São Clemente & Gomes (1992). This is the first record of its plerocercoid larval stages.

The larvae examined in the present study are about three times longer than the scolex of the adult specimens described by São Clemente & Gomes (1992). Great variations in the dimensions of the scolex are also mentioned by these authors and by Stunkard (1977). Palm & Walter (2000) report that vouchers of different species of Nybelinia , Heteronybelinia and Mixonybelina were deposited in the National Helminthological Collection, Beltsville, USA, by Linton under the name of N. bisulcata and for that reason they indicate that N. bisulcata is a species inquerenda. Dollfus (1942) revised these specimens and transferred the species to Nybelinia , since it was originally described as Rhynchobothryum. Linton (1890), however, refers to this species as Tetrarhynchus bisulcatum while stating that it was described in 1886 (see Rhynchobothrium bisulcatum in Linton, 1889: pl. IV). This document,

Figures

FIG. 3. — A, B, Nybelinia bisulcata (Linton, 1889); A, larva in toto; B, basal armature; C, D, Dollfusiella sp.; C, larva in toto; D, hooks