A new free-living nematode species, Terschellingia didistalamphida sp. nov. (Nematoda: Linhomoeidae), with female intersexuality from West Bengal, India

Opuscula Zoologica Instituti Zoosystematici et Oecologici Universitatis Budapestinensis Pub Date : 2023-01-01 DOI:10.18348/opzool.2023.5.159

Tanuka Das, Tandrani Das, Tiasi Ghosh Jana, Goutam Ghosh

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Abstract

A new species of free-living soil nematode, Terschellingia didistalamphida sp. nov., is described from paddy field in West Bengal, India. It is characterized by moderate body length (L=1.0–3.5 mm), possesses two amphids, only four cephalic setae. Amphideal fovea distant from the anterior end, stoma small and narrow, pharynx with well-developed terminal bulb. Females with amphidelphic ovaries. Males with paired testes, ventrally arcuate, short and stout spicules, gubernaculum with clearly developed dorso-caudal apophysis. Tail long and filiform, similar in both sexes. Fourteen female intersexes of Terschellingia didistalamphida sp. nov., with a prominent female reproductive structure and a less conspicuous male reproductive system, were found. These female intersexes are with well-developed vulva and prominent spicules, however, lack apophysis. A checklist for known cases of intersex across various nematode orders has been appended.

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文章标题印度西孟加拉邦一新种雌雄间性散居线虫(线虫纲:蛛科)

报道了印度西孟加拉邦稻田土壤线虫一新种didistalamphida sp. nov.。它的特点是中等体长(L= 1.0-3.5 mm)，有2个两栖类，只有4个头状刚毛。圆角状中央凹离前端很远，气孔小而窄，咽具发育良好的顶芽。具有两性卵巢的雌性。雄具成对的睾丸，腹弓，短而粗壮的针状体，带明显发育的背-尾突。尾巴长而丝状，两性相似。共发现14只雌雄间虫，雌性生殖结构突出，雄性生殖系统不太明显。这些雌性雌雄间性者外阴发育良好，针状体突出，但缺少突突。已附上了一份已知的跨各种线虫目的双性人病例清单。

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Opuscula Zoologica Instituti Zoosystematici et Oecologici Universitatis Budapestinensis

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