Descripción morfométrica y citogenética de Blatticola chydaeus sp. N. (nematoda, thelastomatidae), un parásito de Anurogryllus muticus (de geer, 1773) (orthoptera, gryllidae) en Argentina

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Fecha
10/2023
Editorial
Asociación Peruana de Helmintología e Invertebrados Afines
Revista
Neotropical Helminthology
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Institución organizadora
ISSN
2218-6425
eISSN
1995-1043
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Español
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Resumen
Blatticola chydaeus n. sp. (Nematoda, Thelastomatidae), es un parásito de Anurogryllus muticus (De Geer, 1773) (Orthoptera, Gryllidae) en Argentina, se describe al parásito morfométrica y citognéticamente. Se caracteriza porque la hembra posee una cutícula anillada hasta la mitad del cuerpo, boca rodeada por ocho papilas cefálicas, estoma corto con dos placas y un diente, anfidio piriforme, esófago dividido en tres partes, corpus anterior, istmo y bulbo basal valvado. El poro excretor ubicado posterior al bulbo basal, el anillo nervioso situado al comienzo del istmo esofágico, el intestino más ancho anteriormente, huevos ovales de cáscara lisa en vista apical muestran una sección triangular. Apéndice caudal corto y cónico, con ala anal. Vulva protuberante, vagina larga y posterior. El macho tiene una papila preanal, una papila simple y un par de papilas postanales. Una espícula, corta y sencilla, sin gubernáculo. El apéndice caudal corto, cónico y puntiagudo. El estudio citogenético reveló cromosomas acrocéntricos muy pequeños. Esta nueva especie muestra cromosomas bivalentes 3 y 3 + X, la determinación sexual no se da por haplodiploidía, el cromosoma sexual es X.
Blatticola chydaeus n. sp. (Nematoda, Th elastomatidae), parasitizing Anurogryllus muticus (De Geer, 1773) (Orthoptera, Gryllidae) in Argentina is morphometric and cytogenetic described. It is characterized by the female with cuticle annulated up to the middle of the body, the mouth surrounded by eight cephalic papillae, the stoma short with two plates and one tooth, the amphid pore shaped, the esophagus divided into three parts, anterior cylindrical corpus, isthmus distinct, and basal bulb valvated, the excretory pore located posterior to the basal bulb, the nerve ring situated at the beginning of the esophagic isthmus, the intestine broadest anteriorly, the egg oval, smooth shell, in apical view show a triangular section. Th e tail appendage is short and conic and presents anal alae. Th e vulva is protruding, the vagina is long and posterior. Th e male has one preanal papilla, one simple papilla, and one pair of postanal papillae. One spicule, short and simple, without gubernaculum. Th e tail appendage is short, conic, and pointed. Th e cytogenetic study revealed very small acrocentric chromosomes, this new species shows 3 and 3+X bivalent chromosomes, the sexual determination is not given by haplodiploidy, the sexual chromosome was assumed to be X.
Blatticola chydaeus n. sp. (Nematoda, Th elastomatidae), parasitizing Anurogryllus muticus (De Geer, 1773) (Orthoptera, Gryllidae) in Argentina is morphometric and cytogenetic described. It is characterized by the female with cuticle annulated up to the middle of the body, the mouth surrounded by eight cephalic papillae, the stoma short with two plates and one tooth, the amphid pore shaped, the esophagus divided into three parts, anterior cylindrical corpus, isthmus distinct, and basal bulb valvated, the excretory pore located posterior to the basal bulb, the nerve ring situated at the beginning of the esophagic isthmus, the intestine broadest anteriorly, the egg oval, smooth shell, in apical view show a triangular section. Th e tail appendage is short and conic and presents anal alae. Th e vulva is protruding, the vagina is long and posterior. Th e male has one preanal papilla, one simple papilla, and one pair of postanal papillae. One spicule, short and simple, without gubernaculum. Th e tail appendage is short, conic, and pointed. Th e cytogenetic study revealed very small acrocentric chromosomes, this new species shows 3 and 3+X bivalent chromosomes, the sexual determination is not given by haplodiploidy, the sexual chromosome was assumed to be X.
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