Textrema hopkinsi gen. et sp. n. (Digenea: Cryptogonimidae) from the Largemouth Bass of Central Texas

Abstract

Textrema hopkinsi gen. et sp. n. is described from Micropterus salmoides from central Texas. Textrema is most similar to the genus Multigonotylus but differs in having a single gomotyl. The new genus is placed in the family Cryptogonimidae.

New Data on Pseudomagnivitellinum ictalurum (Trematoda)

“…Additionally, 1) the ovary does not abut against or overlap with the ventral sucker; rather, it is displaced posteriorly from the ventral sucker; 2) the excretory vesicle is I-shaped, although this is not obvious in most specimens; 3) the vitelline follicles are very large and extend from just anterior of the ventral sucker to the anterior region of the posterior testis. In these respects, the new specimens are all but indistinguishable from the holotype drawn in Dronen and Underwood (1980) and the current examination of the paratypes (Table 1; Figs. 1-5).…”

“…In the same work, Pojmańska et al (2008) considered the genus incerta sedis and provided a summary of its diagnosis and a redrawn figure from the original description (Pojmańska et al, 2008, fig. 66.13; Dronen and Underwood, 1980, fig. 1).…”

“…Table 1 summarizes the metrics measured by Dronen and Underwood (1980) and those from the specimens reported herein. The new specimens fall within the range of body size reported by Dronen and Underwood (1980) but do not include any at the largest end of that range. Most of the newly collected specimens contained eggs (Figs.…”

“…ABSTRACT Pseudomagnivitellinum ictalurum Dronen and Underwood, 1980 (Trematoda), was originally described from black bullheads ( Ameiurus melas ) from roadside ditches in the Brazos River watershed in Texas, U.S.A. New specimens of this species were collected from the type host from Little Pine Island Bayou east of the type locality in the Neches River watershed in Texas. The newly collected specimens confirm the species-level taxon as one similar to members of Magnivitellinum Kloss, 1966, but with an oral sucker larger than the ventral sucker, an ovary displaced posteriorly from the ventral sucker, and probably an I-shaped excretory vesicle.…”

“…If that is the case, most of the growth of adult worms must be in elongating the posterior half of the body to accommodate the large number of eggs in the uterus (Fig. 4; see also Dronen and Underwood, 1980, fig. 1).…”