''N. fasciatus'' has 18-20 spines in pronotal ctenidium, but genal ctenidium are absent. It has an elongated body, with 3-4mm in length. | ''N. fasciatus'' has 18-20 spines in pronotal ctenidium, but genal ctenidium are absent. It has an elongated body, with 3-4mm in length. |