Hexamermis paranaense new species (Nematoda, Mermithidae): a parasite of Diloboderus abderus (Coleoptera, Scarabaeidae) in Argentina

Abstract

ABSTRACT.A new species, Hexamermis paranaense n. sp. (Nematoda, Mermithidae), a parasite of larvae of Diloboderus abderus Sturm, 1826 (Coleoptera, Scarabaeidae) is described and illustrated. This new species is characterized by amphids small, amphidial opening pocket-shaped, the anterior portion of the vagina muscularized and slightly protruding with a descending branch forming a loop before joining the uterus, and three rows of genital papillae: the ventrolateral divided in two rows with eight papillae in the outer row and with six papillae in the inner one; the ventral row with four pairs and one single preanal papillae, and with two pairs, a triplete, one pair, a single and one pair postanal papillae. KEYWORDS.Hexamermis paranaense n. sp., Nematoda, Mermithidae, parasite, Scarabaeidae, Argentina. RESUMEN.Hexamermis paranaense sp. nov. (Nematoda, Mermithidae): parasito de Diloboderus abderus (Coleoptera, Scarabaeidae) en Argentina. Una nueva especie, Hexamermis paranaense sp. nov. (Nematoda, Mermithidae), parásito de larvas del gusano blanco, Diloboderus abderus Sturm, 1826 (Coleoptera, Scarabaeidae), se describe e ilustra. Esta nueva especie se caracteriza por poseer anfidos pequeños, con la apertura en forma de bolsillo, parte anterior de la vagina muscular, con una rama que desciende y forma un lazo antes de la conexión al útero, tres hileras de papilas genitales: la hilera de posición ventro-lateral dividida en dos hileras con ocho papilas en la hilera externa y con seis papilas en la interna; la hilera ventral con una papila, seguida de cuatro pares, todas en posición preanal y dos pares, interrumpidos por tres papilas, seguida de un par, una simple, y un par, todas de posición postanal.

A Worker-Like Female of Myrmica sabuleti (Meinert, 1861) (Hymenoptera: Formicidae: Myrmicinae) in a Pitfall Trap with Five Mermithids (Nematoda: Mermithidae) Protruding from the Gaster

“…The sequences we established are similar to ones from Agamermis and Hexamermis, which build a monophylum within the Mermithidae (Park et al, 2011;Kubo et al, 2016). Both Agamermis and Hexamermis have been reported from a broad range of insect hosts (e.g., Achinelly & Camino, 2008;Stubbins et al, 2016; and references therein) but, as far as we know, not from ants (Poinar, 2012 and Web of Science queries on 20 November 2018). However, despite the high similarity to Agamermis and Hexamermis, uncertainty remains, in that of the safely identified recent mermithid genera found in ants (Poinar, 2012), two (Allomermis, Pheromermis) are represented in GenBank (Nucleotide query of 21 November 2018) but not the other four (Agamomermis, Camponotimermis, Comanimermis, Meximermis).…”

First Report of Mermithidae (Enoplea: Mermithida) Parasitizing Adult Stable Flies in Japan

“…Additionally, Hexamermis sp. ( Achinelly and Camino, 2008 ) and Amphimermis sp. ( Baker and Poinar, 1994 ) parasitism has been reported in Coleoptera, Dermaptera, Diptera, Hemiptera, Homoptera, Hymenoptera, Lepidoptera, Odonata, and Orthoptera.…”

A new species of the genus Hexamermis Steiner, 1924 (Nematoda: Mermithidae) from northern Iran: a nematode with an unusual uterine morphology

“…Hexamermis Steiner 1924 has been widely used in studies where agricultural pests are infested by entomopathogenic nematodes (Achinelly & Camino 2008). The genus is classified under Mermithidae and characterized by a morphological pattern very similar to what is observed in Agamermis (Cobb et al 1923), with a very significant difference of presence ( vs absence) of tail tip appendage that is always preserved after final molt (Hernández-Crespo & Santiago-Álvarez 1997).…”