Histology and ultrastructure of the glands associated with the porose areas on the gnathosoma ofRhipicephalus evertsi evertsi before and during oviposition

Gothe, R.; Göbel, E.; Neitz, A.W.H.

doi:10.1007/bf01270461

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…During oviposition, this long cellular duct surrounded by sheath cells associates with each pore of the porose areas. Duct cells forming the cellular duct correspond to the proximal cells of Rhipicephalus evertsi evertsi (Gothe et al, 1987). In the duct cells just beneath the valve, microtubules extending downward from the cuticular structures (the flap-like structure and the cuticular projection) may play a mechanical role in closing and opening the valve.…”

Section: ) Porose Areas and Their Accessory Glandsmentioning

confidence: 99%

“…Secretions in the cytoplasm are discharged into the secretory canaliculi by exocytosis, secretions in the canaliculi are released into the duct lumen via the narrow part of the junction of the secretory and duct cells, and are released from pores of the porose areas. Secretory cells of accessory glands correspond to the distal cells of R. evertsi evertsi (Gothe et al, 1987). In B. microplus a single acinus connects with each pore of the porose areas through a duct (Booth et al, 1984a), but in H. longicornis 6-8 acini are connected with each pore.…”

Section: ) Porose Areas and Their Accessory Glandsmentioning

confidence: 99%

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Reproduction in a Metastriata Tick, Haemaphysalis longicornis (Acari: Ixodidae)

Matsuo¹,

Okura²,

Kakuda³

et al. 2013

J. Acarol. Soc. Jpn.

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The superfamily Ixodoidea includes two major families: the Ixodidae called "hard tick" and Argasidae called "soft tick". Furthermore, Ixodidae is classified into Prostriata (Ixodidae: Ixodes), and Metastriata (Ixodidae except for Ixodes) based on their reproductive strategies. That is, species in each group have characteristic reproductive organs and systems. Ticks are important as vectors of various pathogens. Haemaphysalis longicornis belonging to the Metastriata is characterized by having both the parthenogenetic and bisexual races, and is widely distributed in Australia, New Zealand, New Caledonia, the Fiji Islands, Japan, the Korean Peninsula and northeastern areas of both China and Russia. This species is known as a vector of rickettsiae causing Q fever, viruses causing Russian spring-summer encephalitis, and protozoa causing theileriosis and babesiosis. H. longicornis, the most dominant tick in Japanese pastures, is very important in agricultural and veterinary sciences because this species also transmits piroplasmosis caused by Theileria and Babesia parasites among grazing cattle. We present here an overview reproduction in the bisexual race of H. longicornis.

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Section: ) Porose Areas and Their Accessory Glandsmentioning

confidence: 99%

Section: ) Porose Areas and Their Accessory Glandsmentioning

confidence: 99%

Reproduction in a Metastriata Tick, Haemaphysalis longicornis (Acari: Ixodidae)

Matsuo¹,

Okura²,

Kakuda³

et al. 2013

J. Acarol. Soc. Jpn.

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Ixodes ricinus (Linnaeus, 1758): Integument

Starck

2023

Microscopic Anatomy of Animals

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The integument of Ixodes ricinus consists of the single‐layered epidermis and the cuticle. The integument differentiates into hard and soft body surface, the interarticular/intersegmental folds, cuticular sensory organs, setae, and epidermal glands with their excretory ducts (including salivary glands and salivary ducts). The enormous amount of food taken up by adult females during feeding requires specialized morphological features of the integument to accommodate the volume changes of the body (i.e. a combination of expandable cuticle/epidermis, proliferation of epidermis cells, and production of new cuticle). The morphology of the integument of Ixodes ricinus males and females is documented in this contribution and its functional features are discussed.

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J¹,

Gothe²

2000

Experimental and Applied Acarology

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The process of oviposition in D. reticulatus was observed and found to be a sequence of exactly coordinated, interlocking events independent of the phase of oviposition. The average period of oviposition in the investigated ticks was 31.6 days at 20 degrees C and 95% relative humidity. The number of eggs deposited on each day increased until reaching a maximum on the fifth day of oviposition and then decreased continuously. As a result, most of the eggs were deposited during the initial phase of oviposition. The total number of eggs was proportional to the ticks' weight replenishment. Egg-laying commenced with the lowering of the capitulum and the simultaneous spread of the pedipalps which were lowered to the body wall embracing the genital aperture on both sides. Immediately afterwards the cuticular sac of Gene's organ was pushed out and retracted several times. At the cuticular sac's maximum extension, the vestibulum vaginae prolapsed, forming the ovipositor as an extended tube which handed over an egg to the two horns of the cuticular sac after a brief, but intensive, contact with the cuticular sac. Then the vestibulum vaginae invaginated, the pedipalps closed, and the cuticular sac was retracted. Finally, the egg was transported onto the dorsal area of the tick by means of a vigorous rising of the capitulum. During the course of oviposition most of the events, especially the period of egg embracement by the cuticular sac, were prolonged, as was the total time for laying one egg. Similarly, the intervals between successive egg-laying processes increased continuously. The number of eggs deposited was not dependent on the functional ability of Gene's organ, as shown by similar numbers of deposited eggs from ticks with and without mechanical blocking of the cuticular sac. But the participation of the organ in the process of oviposition proved to be a prerequisite for the viability of the eggs. Larvae developed and hatched only from those eggs which were deposited from ticks with an undisturbed Gene's organ. In comparison, eggs without contact to the cuticular sac of Gene's organ dried up and shrivelled immediately after being deposited and did not hatch. Consequently, it strongly suggests, together with the results from other studies, that Gene's organ covers the eggs with a secretion that prevents the loss of water.

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Histology and ultrastructure of the glands associated with the porose areas on the gnathosoma ofRhipicephalus evertsi evertsi before and during oviposition

Cited by 5 publications

References 8 publications

Reproduction in a Metastriata Tick, Haemaphysalis longicornis (Acari: Ixodidae)

Reproduction in a Metastriata Tick, Haemaphysalis longicornis (Acari: Ixodidae)

Ixodes ricinus (Linnaeus, 1758): Integument

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