Identification of glandular and poroidal idionotal systems inMacrocheles perglaber F. & P. (Acari: Macrochelidae)

Abstract

Based on a silver nitrate reduction treatment of adult and immature Macrocheles perglaber, certain of the dorsal cuticular openings were found to be sites of glandular secretion and were designated as crobylophores. Reactivity tests showed an ontogenetic progression of dorsal gland activity, with those of tested larvae being non-reactive at all pore sites. Six pairs of glands were identified on the adult dorsum on the basis of reduction reactions.

Two new species of Gaeolaelaps (Acari: Mesostigmata: Laelapidae) from Iran, with a revised generic concept and notes on significant morphological characters in the genus

“…Among ventral pore-like structures (including poroids and gland pores), the pair of 'preanal' pores gv3, located on the ventrianal shield (or on or near the anal shield in other groups), is commonly used for species identification of phytoseiids and virtually always included in species descriptions. However, despite the work of Athias-Henriot and of others (particularly Redmond, 1987 andJohnston &Moraza, 1991), many (if not most) species descriptions of Phytoseiidae (e.g. see Denmark & Evans, 2011) and of other mesostigmatan families lack any detailed account of the 'pores' (often mentioned as such, without distinguishing true pores and poroids) on the idiosoma other than gv3 (in the case of phytoseiids), and those are often incompletely illustrated.…”

“…The two notation systems could be reconciled in the future, and correspondence in notation established. The system suggested by Hirschmann (1960) and Hirschmann & Wiśniewski (1982) for Digamasellidae may also have its use (and see Evans & Till (1979) for an outline of Hirschman's system; note that Krantz & Redmond (1987) appear to have used the Evans & Till (1979) notation for their own study), but unfortunately does not distinguish between poroids and true (gland) pores. In any case, comparative study of gland pores and proprioceptors (poroids) across mesostigmatan taxa may give us useful insight in their relationships, as implied by Athias-Henriot's research (e.g.…”

“…Distinction of idiosomal pore-like structures as glandular openings (gland pores or solenostomes) versus poroids (proprioceptors or stress receptors, often called 'lyrifissures') were distinguished based on previous work by Athias-Henriot (1969b, 1975 on various Mesostigmata and by Krantz & Redmond (1987) on Macrochelidae, and their notation generally follows that of Athias-Henriot (1975) for the dorsal idiosoma, and Athias-Henriot (1971) for the ventral idiosoma. There are discrepancies in notation of dorsal structures between Athias-Henriot (1975) and Beard (2001) (respectively, homologous setae with different names are idl1=idl2, id5=id1a) and more substantial ones with Athias-Henriot's earlier publications (e.g.…”

A new genus of mites of the subfamily Platyseiinae associated with Azteca ant galleries in Cecropia trees in Costa Rica (Acari: Mesostigmata: Blattisociidae)

“…Leg lengths are taken from the base of the coxa to the apex of the tarsus excluding the pretarsus. Distinction of pore-like structures on the idiosomatic integument as either poroids (lyrifissures) or glandular openings (solenostomes), as distinguished morphologically by Athias-Henriot (1969, 1971, 1975 and physiologically by Krantz & Redmond (1987), is presented stylistically in the illustrations; gland pores are shown in circular form, while poroids are shown in elliptical form as in Figure 1A. Notation for pore-like structures of the peritrematal region follows that of Johnston & Moraza (1991).…”

A new genus and species of Epicriidae (Acari, Mesostigmata) from eastern North America

“…Idiosomal setal notation follows Lindquist and Evans (1965), with modifications for the caudal region as given by Lindquist (1994) and Lindquist and Moraza (1999). The system of abbreviations for designating dermal glands and lyrifissures is based on Johnston and Moraza (1991) and Krantz and Redmond (1987). The system used to describe the chaetotaxy of tarsus I is based on Evans (1963).…”