genus aegyptobia sayed (acar., tenuipalpidae) in the u.a.r., with a description of a new species

Genus Aegyptobia Sayed (Acar., Tenuipalpidae) in the U.A.R., with a Description of a new Species

By ABD EL TAWAB A. YOUSEF'

With I Figuir

Abstract

Up to this time two species of Aegyptobiu Sayed have been described. Aeg. trugBrdhz Sayed and Aeg. sulixi Zaher and Yousef were widely distributed allover the U.A.R., as the former was found on Thuju sp. and the latter inhabited Sulix sp. A new species, Aeg. suyedi n. sp., collected from Cupressus sempervirens in both Giza and Gaza strip, is described.

Key to the Aegyptobia species

Females, collected in U.A.R.

Mites of the genus Aegyptobia Sayed can be easily separated from other tenuipapids by the presence of three pairs of anal setae and four pairs of genito-anal ones in adult female and male respectively. I. Body broadly ovate; dorsum of propodosoma reticulate medio-dorsally;

dorsal propodosomals broadly lanceolate, coarsely serrate . . . . . . . . . . . . . . Aegyptobia salixi 2. & Y. Body elongate oval . . . . . . . . . . . 2

2. Rostral shield lacking; propodosoma with longitudinal striae dorsally; dorsal propodosomals setiform . . Aegyptobia tragdudhi Sayed Rostral shield present; propodosoma reticulated dorsally; dorsal propo- dosomals lanceolate, serrate . . . . Aegyptobia sayedi sp. n.

Aegyptobia tragardhi Sayed Synonyms

Aegyptobia tragdrdhi Sayed, 1950 Pentamerismus tragdrdhi (Sayed), 1954 This species is characterized by having a striated dorsum and a setiform

dorsal propodosomals. H o s t p 1 a n t : Thuja orientalis. L o c a 1 i t y: ZAHER and YOUSEF (1969) found it in Cairo, Giza, Port-Said and Alexandria. Also it was recorded on the same host in Sharkia. Gharbia and Assuit.

Plant Protection Laboratory, National Research Centre Dokki, U.A.R.

Genus Acgypiobiu Suyed zn the U.A.R. 135

Aegyptobia salixi 2. & Y

This s y c i e s can be recognized by its broadly ovate body and the reticulated dorsu!n ot: propodosoma. Also, the dorsal body setae broadly lanceolate, coarsely serrate. H L O c ,! 1 i t y: Z A H F I I a n d YOUSI 1: (1969) recorded i t in Giza, Cairo, Sharkia, Kalyoubia and I I hlcnia. The author noticed its occurrence in every part of the country where i t s

r p 1 3 n t : Saiix sp.

host \ V ~ S found.

Aegyptobia sayedi sp. n.d Diagnosis

This species can be recognized by having an elongate oval body and a long rostrum that reaches the middle of tarsus I. Propodosoma reticulated dorsally and with dorsal propodosomals lanceolate, serrate.

Female Palpus five segmented, the second is the longest with a rather long seta

and the first one is the shortest. The three other palpal segments nearly of the same length, the penultimate one with two setae, the terminal one bears a lateral short sensory rod and two short setae. Leg I and 11 each with a single sensory rod; femora, genua (patellae) and tibia, each bearing a dorsal lanceolate, serrate seta; tibia I and 11 each with a whiplike seta;

Aegyptobia sayedi sp. n., female - Lef?: Ventral view, Right: Dorsal view

This species is named in the honor of Dr. M. T. SAYED visitor Professor of Entomology, Faculty of Science, Ain-Shams University.

136 Abti tl 7'awdb A. \ 'oustf

claws well-developed with tenent hairs. Rostrum long extending t l l l the middle of tarsus I ; rostra1 shield bifurcate, consisting of two large lobes and two sinall ones.

Propodosoma with a dorsal reticulate pattern; three pairs of dorsal propodosomals present, broadly lanceolate, deeply serrate, the third pair is the smallest one. Two pairs of eyes located laterally, the anterior pair smaller than the posterior one.

Hysterosoma with a dorsal longitudinal striae mediodorsally, irregular ones mediolaterally and oblique ones laterally. Hysterosomals, one pair humural, five pairs dorsolaterals, four pairs dorsosublaterals, and three pairs dorsocentrals. The humeral and the first pair of dorsosublateral and dorso- central hysterosoinal nearly of the same length; the dorsocentrals decrease in length posteriorly; while dorsolaterals are nearly of the same size.

Venter of body smooth; propodosoma with a pair of long medioventral setae; hysterosoma with two pairs of setae, an anterior long one and a rather short posterior one. Opisthoina with a short pair of pre-genital setae; genital area with two pairs of setae; and anal area with three pairs of anal setae.

Body length 321.7 p; width 147.2 p. M a 1 e : Unknown. H o s t p 1 a n t : Cupressus semperwzrens L. L o c a l i t y : Giza and Gaza strip.

P a r a t y p e s : 6 females. Holotype female in the collection of the National Research Centre.

Acknowledgement

The author express his deepest gratitude to Dr. E. W. BAKER of U.S.D.A. for the confir- mation of the new species. Thanks are also due to Dr. H. S. SALAMA, Associate Professor of the National Research Centre, U.A.R. for revising the article.

Zusammenfassung

Genus Aegyptobia Sayed (Acar. , Tenuipalpidae) in der U.A.R. n i t Beschveibung einer neuen Art

Bisher waren 2 Arten yon Aegyptobia Sayed bekannt: Aeg . trug2rdhi Sayed an Thu ja sp. und Aeg . salixi 2. u. Y. an Salix sp. Eine neue Art, Aeg. sayedi n. sp. an Cupressus semper- wirens, wird beschrieben.

References

BAKER, E. W., and PRITCHARD, A. EARL, 1954: A key to mites of the genus Pentamerismus, with a description of three new species (Acarina: Phytopitalpidae). Wasmann Jour. Biol. 11, 353-366.

PRICHARD, A. EARL, and BAKER, E. W., 1958: The false spider mites (Acarina: Tenuipal- pidae). Univ. California Pubs. Ent., Vol. 14 (3), 175-274.

SAYED, M. T., 1950: Description of a =em genus and two new species of the family Tenuipalpidae Sayed (Acarina). Proc. Eighth. Internatl. Congr. Ent., pp. 1018-1021.

ZAHER, M. A., and YOUSEF, A. A., 1969: Three genera of family Tenuipalpidae (Acarina) in the U.A.R., with description of three nem species. Acarologia 11 ( 2 ) , 272-280.