La tératologie des Tiques

Abstract

Historique.-Ce n'est que fort tard que l'on signale des anoma lies chez les Tiques. C'est en effet seulement en 1899 que Neumann décrit les trois premiers cas tératologiques connus : la présence d'un oeil surnuméraire chez un Hyalomma sp., l'absence de la pre mière patte gauche chez un Amblyomma sp. et l'atrophie de la qua trième patte droite chez un Ixodes hexagonus. Chose curieuse, la première, et en même temps la plus intéressante de ces monstruo sités, n'a été observée qu'une fois depuis. Le premier monstre double n'est signalé qu'en 1909 par Warburton et Nuttall et le premier gynandromorphe en 1916 par Teresa Joan. Les documents que nous possédons ne remontent donc pas à plus de cinquante ans, alors qu'il existe des descriptions de mons truosités chez les Insectes depuis le début du XIXe siècle et chez les Crustacés depuis 1844. Même pendant cette courte période, les documents ne se succèdent pas à des intervalles très rapprochés : les publications les plus importantes sont celles de Warburton et

External morphological anomalies in ixodid ticks from Thrace, Turkey

“…The percentage of anomalous specimens studied is concordant with the results of other researchers (Tovornik 1987;Latif et al 1988;Buczek 1995;Guglielmone et al 1999;Nowak-Chmura 2012). Environmental factors such as temperature, RH (Siuda 1981;Buczek 1988Buczek , 1991Buczek , 2000, pollution Kittler 2011), and chemical agents including insecticides (Robinson 1944;Buczek et al 2013), retinoic acid (Belozerov 2003(Belozerov , 2004, iodine compounds (Buczek 1993), sulfuric acid and ethyl quinone (Campana-Rouget 1959) were reported to lead to anomalies in both natural and experimental populations. Moreover, host resistance to tick infestation is known to change the morphology of subsequent tick development stages (Estrada-Peña 2001).…”

“…External morphological anomalies which are seen much more frequently in ixodid ticks are generally grouped in two categories: General and local anomalies. While the formerincludes asymmetry, and bifurcation of the idiosoma, dwarfism, gigantism and gynandromorphism, the latter is related tooligomely, atrophy (brachymely), symely, heterosymely, anisomely, schistomely, ectomely, ectromely, polymelyand heteromorphose (heteromorphosis) of legs, deformities of certain mouthparts, Haller's sensory organ and anus structure, oligomely of the porose area and chelicera, anomaly in the form and course of the anal groove (Campana-Rouget 1959;Haarløv 1962;Buczek et al 1991, 2004Buczek 1995Leonovich and Belozerov 2004;Dergousoff and Chilton 2007;NowakChmura 2012). However, anomalies in the structure of internal organs also can be seen in ticks (Laptev 1963;Latif et al 1988).…”

A Case of Gynandromorphism in <I>Amblyomma oblongoguttatum</I> (Acari: Ixodidae)

“…Fifty-eight cases of gynandromorphism have been reported in Ixodidae during this century, in the following genera: Hyalomma (21 cases), Amblyomma (15), Rhipicephalus (8), Boophilus (5), Ixodes (5), Hemaphysalis (2), and Dermacentor (2) (see lists by Dias 1953, Campana-Rouget 1959, Gothe 1967, Homsher and Yunker 1981, Caeiro and Simõ es 1989, Clarke and Rechav 1992, Vinabal et al 1994, Keirans and Lane 1997. Except for one case (Oliver and DelÞn 1967), all others occurred naturally.…”

A case of abnormal size in eggs and larvae of the Taiga tick, Ixodes persulcatus (Acari: Ixodidae)

“…Giant eggs were only observed in egg batches laid by long-day females (in two out of five batches) and never in egg batches laid by short-day females (all eight of these batches contained only normal eggs (Linley and Craig, 1994). Numerous data on abnormalities and deformations in ixodid ticks (Campana-Rouget, 1959), including those in recent publications (Alekseev and Dubynina, 1993), mainly concern adult ticks. There is no information available on any abnormalities of eggs in ixodid ticks.…”