Dactylogyrids (Monogenoidea) Parasitizing Microlepidotus brevipinnis (Haemulidae) from the Pacific Coast of Mexico: Magnanchor raris n. gen., n. sp. and Supplementary Taxonomic Information for Mexicana bychowskyi Caballero and Bravo-Hollis 1959
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引用次数: 0
Abstract
As part of a marine ecology study aimed to discover the diversity of fish parasites, we described a new species representing Magnanchor n. gen. and provided new and supplementary morphometric information for Mexicana bychowskyi, both monogenoidean species collected from the gill lamellae of the humpback grunt Microlepidotus brevipinnis (Haemulidae) from the Pacific coast of Mexico. The new genus is proposed for its unique species, M. raris n. sp. which is characterized in having overlapping gonads (testis posterodorsal to the germarium), a copulatory complex consisting of counterclockwise coils of the copulatory organ that is unarticulated to the accessory piece, a haptor armed with two pairs of anchors (each with broad base and well differentiated roots), dorsal and ventral bars, a dextral vaginal aperture, and 6 pairs of hooks with uniform shank and upright acute thumb. Data on morphological and biometric variability of the six species of Mexicana (including illustrations of the haptoral structures of the present specimens of M. bychowskyi) previously described and/or reported parasitizing different haemulid hosts from the Pacific and Atlantic oceans in the Tropics are also provided. Due to the morphological similarities among the amphiamerican species of Mexicana, they could represent sister-species pairs in the Tropics. Magnanchor raris n. sp. and M. bychowskyi (type species of the genus) are the first dactylogyrids described and/or reported on M. brevipinnis.
Dactylogyrids (Monogenoidea) Parasitizing Microlepidotus brevipinnis (Haemulidae) from the Pacific Coast of Mexico：Magnanchor raris n. gen., n. sp.和 Mexicana bychowskyi 的补充分类信息 Caballero 和 Bravo-Hollis 1959
摘要 作为一项旨在发现鱼类寄生虫多样性的海洋生态学研究的一部分，我们描述了一个代表Magnanchor n. gen.的新物种，并为Mexicana bychowskyi提供了新的补充形态计量信息，这两个物种都是从墨西哥太平洋沿岸的驼背噜鹬Microlepidotus brevipinnis（Haemulidae）的鳃片中采集的单源寄生虫。新属的提出是因为其独特的物种 M. raris n. sp.其特点是性腺重叠（睾丸位于生殖器的后背），交配复合体由逆时针方向的交配器线圈组成，交配器线圈与附属物无关节连接，触角上有两对锚（每对锚都有宽大的基部和分化良好的根部）、背栅和腹栅、一个外侧的阴道孔和 6 对钩，钩柄一致，拇指直立锐尖。此外，还提供了以前描述和/或报道的寄生于热带地区太平洋和大西洋不同血吸虫宿主的六个墨西哥种的形态和生物特征变异数据（包括 M. bychowskyi 目前标本的触角结构插图）。由于墨西哥两栖种在形态上的相似性，它们可能是热带地区的姊妹种对。Magnanchor raris n. sp.和 M. bychowskyi（该属的模式种）是首次在 M. brevipinnis 上描述和/或报道的双触角虫。
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