Development of Turgida turgida (Rudolphi, 1819) in the common field cricket (Acheta pennsylvanicus Burmeister)

Abstract

Several species of orthopterans and coleopterans were experimentally infected with Turgida turgida. The common field cricket, Acheta pennsylvanicus, was the most suitable host. Eggs of T. turgida usually hatched in the ileum of crickets. Larvae were observed in the wall of the ieum 4 h postinfection. Larvae became encapsulated in the gut wall and moulted twice. At 30 °C the first moult occurred 5 days and the second one 10 days after infection. Larvae are described in detail. The intensity of T. turgida in crickets could be augmented by challenge infections.

Scanning electron microscopy observations of the hedgehog stomach worm, Physaloptera clausa (Spirurida: Physalopteridae)

“…The broad papilla may represent a distinct type of sensory structure [23]. Like P. rara and P. bispiculata , and in contrast to P. praeputialis , T. turgida has paired phasmids [11,22,43]. In the present study, the pattern of the cuticle of male P. clausa at the cloacal region was different and covered with small cuticular ridges.…”

“…In 2001, Matey et al speculated that the general arrangement of male caudal papillae in T. turgida is the same as in P. praeputialis , P. rara , and P. bispiculata [23]. The unique feature of male T. turgida is the presence of the 22 nd broad caudal papilla, which had already been observed by Gray and Anderson in 1982 [11], who considered it a sessile papilla. The broad papilla may represent a distinct type of sensory structure [23].…”

7.21 Order Spirurida

“…7.211 F;Poinar & Vaucher 1972, Poinar & Quentin 1972. 7.211 H; a species from lizards, in Poinar & Vaucher (1972); two species from mammals, in Lincoln & Anderson (1975), Gray & Anderson (1982b)]. Each lateral lobe has a conical membranous apex (future external lateral tooth) and two internal points, whereas each subdorsal and subventral lobe has a labial papilla and four small internal points.…”

The first description of eggs in the male reproductive system of Physaloptera bispiculata (Nematoda: Spiruroidaea)

“…The spirurid nematodes, in the adult stage, are obligatory parasites of vertebrates and require one or more intermediate arthropod hosts (Stunkard, 1953). Insects serve as the intermediate host of species of the genus Physaloptera Rudolphi, 1819 (Gray & Anderson, 1982), while reptiles and amphibians serve as paratenic hosts (Widmer, 1970). Nematodes of the Physaloptera genus have been reported as parasites of amphibians, reptiles, birds and mammals, mainly in the stomach but sometimes also in the small intestine (Ortlepp, 1922(Ortlepp, , 1937.…”