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Acarologia

A quarterly journal of acarology, since 1959Publishing on all aspects of the Acari

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A NEW GENUS IN THE SUBFAMILY NOTHOPODINAE WITH

DESCRIPTIONS OF FOUR NEW SPECIES FROM EAST AFRICA

(ACARI : ERIOPHYOIDEA : ERIOPHYIDAE)

BY B. A. ABOU-A WAD * AND E. M. EL-BANHA WY *

TAXONOMY

ERIOPHYIDAE

KENYA

TANZANIA

ABSTRACT: A new genus, Neojloracarus and four new species: Neojloracarus guajavae infesting Psidium guajava L., Phyllocoptes lantanae infesting Lantana camara L., Aculus didymbotryae infesting Cassia didymbotrya L., and Vasates rhois infesting Rhus sp. are described from Kenya and Tanzania. Relationships of the new genus and species with the related ones and nature of damages are discussed.

TAXONOMIE

ERIOPHYIDAE

KENYA

TANZANIE

REsuME: Un genre et quatre especes nouveaux, Neojloracarus guajavae n.g .. , n. sp., infestant Psidium guajava L., Phyllocoptes lantanae n. sp. infestant Lantana camara L., Aculus didymbotriae n. sp. infestant Cassia didymbotria L., et Vasates rhois n. sp. infestant Rhus sp., sont decrits du Kenya et de la Tanzanie. Les relations des genre et especes nouveaux avec les formes apparentees et la nature des dommages sont discutees.

Genera of the subfamily Nothopodinae Keifer, 1956 are classified according to presence or absence of dorsal shield tubercles, dorsal shield tubercles either ahead of rear shield margin and directing setae up and centrad or on rear shield margin and setae divergently to rear, forecoxae either separate or fused across short or moderately long sternal line, first setiferous coxal tubercles and setae either present or absent, and foretibia either completely fused with tarsi or distinct slightly. According to these definitions Neofloracarus gen. n. reported in this work is close to genus Floracarus Keifer which is belonging to Nothopodinae. Also, within the subfamily Phyllocoptinae there are 3 new species belonging to genera Phyllocoptes Nalepa, 1889, Aculus Keifer, 1959, and Vasates Shimer, 1869 recorded from the same locality. These genera, however, have been reported from different geogra­phical localities on economic plants such as Mora­ceae"Rosaceae, Solanaceae, Myrtaceae, Anacardia-

ceae, and Fabaceae, and all known as vagrant fusiform pests causing damage. Type materials are in the author's collection.

FAMILY ERIOPHYIDAE NALEPA

SUBFAMILY NOTHOPODINAE KEIFER

lVeoj7oracarus gen. n.

This genus is close to Floracarus Keifer, 1953 in ~aving the dorsal shield tubercles and lacking tibia segments on legs. It can be distinguished by dorsal setae ahead of rear shield margin. It is defined as follows:

Body fusiform; rings sub equal dorsoventrally.

* Plant Protection Department, National Research Centre, Dokki Cairo, A.R.Egypt.

Acarologia, t. XXXIII, fase. 2, 1992.

- 158

Rostrum median. Dorsal shield nearly circular with short anterior lobe. Dorsal tubercles ahead of rear shield margin, directing setae upwards and medially. Legs without normal segmentation, fore­

. tibial and hindtibial segments absent, tarsus with one seta on hindlegs ; featherdaw simple. Anterior coxae broadly connate . First coxal tubercles and setae absent. Abdomen with all standard setae except accessory setae. Female genital converflap with longitudinal ribs.

GENOTYPE : Neojloracarus guajavae sp. n.

Neoj1oracarus guajavae sp. n.

(Fig. 1)

FEMALE : 140-177 fJ.m long, 50-57 fJ.m wide; fusi­form; flattened dorso-ventrally, pale yellowish. Rostrum about 23 fJ.m long, projecting down; chelicera about 17 fJ.m long, antapical seta 3 fJ.m long. Dorsal shield 39 fJ.m long, 58 fJ.m wide, nearly circular, with short an anterior lobe; shield area

. unornamented with incomplete median and undu-

FIG. I : Neofloracarus gllajavae n.g., n. sp.

D) Dorsal view of mite; DA) Anterior dorsal shield; F) Featherclaw; V) Ventral view of mite; GM) Male genitalia; GFI) Female genitalia and anterior section of mite; L) Legs of adult mite.

lating admedian lines at central shield area, two cross curved lines connecting the admedians; median and admedian lines surrounding anteriorly and posteriorly with connecting undulating circular line. Dorsal tubercles 21 [Lm apart, small in size, well ahead of rear shield margin, the seta 6 [Lm

long, directed medially. Forelegs 19 [Lm long; femur 8 [Lm long; genu 2 [Lm long, seta 25 [Lm long; tibia absent; tarsus 6 [Lm long, outside seta about 17 [Lm long. Claw 5 [Lm long; axis of featherclaw undivided, 4-rayed on each side. Hindlegs 17 [Lm

long; femur 7 [Lm long; genu 2 [Lm long, seta 8 [Lm

long; tibia absent; tarsus 6 [Lm long, inside seta absent, outside seta about 17 [Lm long. Claw 6 [Lm

long. Coxae smooth; 1st setiferous coxal tubercles and setae absent; anterior coxae broadly connate ; seta of coxae 11 measuring 17 [Lm long and arising from small tubercle. Sternalline present. Abdomen with about 45 tergites and 57 sternites; posterior margins of sternites beset with round micro tuber­cles. Lateral thanosomal seta 17 [Lm long, on about sternite 9; 1st ventral seta 20 [Lm long, on sternite 22 ; 2nd ventral seta 6 [Lm long, on sternite 34 ; 3rd ventral or telosomal seta 15 [Lm long, on 6th ring from rear. The thanosome with about 39 [Lm tergi­tes and 51 sternites. Telosomal rings with fine striations ventrally. Caudal seta about 43 [Lm long; accessory seta absent. Female genitalia 12 [Lm long, 16 [Lm wide, with 8 longitudinal ribs; genital seta 6 [Lm long.

MALE: 195 [Lm long, 57 [Lm wide. Male genitalia 8 [Lm long, 12 [Lm wide; genital seta 5 [Lm long.

TYPE LOCALITY : Nairobi, Kenya. Collected March 15, 1986. (Holotype, allotype slides and 5 paratype slides).

HOST: Psidium guajava L., guava, (Myrtaceae). RELATION TO HOST: vagrant species, preferring

the lower surfaces and causing rusting symptoms.

REMARKS: It is interest to note that guava trees are infested with three different species of eriophyid mites: Aceria biopsidia Keifer (1969), Venezuela; Abacarus uructae Keifer (1972), Colombia; and Rhynacus haramotonis Keifer (1974), Hawaii. This new mite is the 4th species.

159 -

Phyllocoptes ialltallae sp. n.

(Fig. 2)

FEMALE.: 193-273 [Lm long, 70-85 [Lm wide; elon­gate spindleform, white to light yellow. Rostrum about 22 [Lm long, projecting down, chelicera about 17 [Lm long, antapical seta 3 [Lm long. Shield 44 [Lm

long, 60 [Lm wide, oval. Anterior shield lobe projec­ting shortly over rostrum base but pointed in side view. Shield design of absence median line; complete undulating admedian lines; admedian lines connecting anteriorly at about t with two incomplete parallel submedian curved lines, exten­ding to rear, forming faint cells at sides of shield; third incomplete submedian line curving around outside of tubercles, connecting between admedian lines at about two thirds and rear margin. Shield laterally with faint broken longitudinal lines and dots at rear. Dorsal tubercles 18 [Lm apart, ahead of rear margin; dorsal setae 5 [Lm long, projecting up and centrad. Forelegs 30 [Lm long; femur 10 [Lm

long; genu 6 [Lm long, seta about 29 [Lm long; tibia 5 [Lm long, seta 6 [Lm long, tarsus 7 [Lm . long, outside seta about 19 [Lm long. Claw 6 [Lm long, with large knob at tip; featherclaw 4-rayed. Hin­dlegs 28 [Lm long; femur 9 [Lm long; genu 5 [Lm

long, seta 11 [Lm long; tibia 5 [Lm long, without seta; tarsus 7 [Lm , outside seta about 21 [Lm long. Claw 6 [Lm long, with large knob at tip; feather­claw 4-rayed. Anterior coxae contiguous poste­riorly at two thirds, with two setae on each; coxal setae I wider apart than setae 11, which located at the base of sternal line; posterior coxae contigous with anterior ones and each with a single setae, measuring about 30 [Lm long .. , All coxae blank. Tergites 50 in number, without micro tubercles ; sternites about 75 in number, heavily tuberculated with micro rounded tubercles: Lateral thanosomal seta 17 [Lm long, above and behind genital seta, on about sternite 9; 1st ventral seta 57 [L~ long, surpassing second ventral seta, on abouts'ternite 26; 2nd ventral seta 19 [Lm long, on about sternite 45; 3rd ventral or telosomal seta 26 [Lm long, on 6th ring from rear. The thanosome with 44 tergites and about 69 sternites. Telosome with microstria­tions ventrally. Caudal seta arise from a small lobe

- 160-

FIG. 2 : Phyl/ocoples lanla/we sp. n.

DA) Anterior dorsal shield; F) FeathercIaw; SA) Side view of anterior section of mite ; GFI) Female genitalia and anterior section of mite; ES) Side skin structure ; S) Side view of adult mite

behind the last tergite, and measures about 54 fLm long; accessory seta absent. Female genitalia 17, fLm 21 fLm wide, without longitudinal ribs, but faint lines on covertflaps ; seta 10 fLm long, airsing from small tubercle.

MALE: Unknown. TYPE LOCALITY: Nairobi, Kenya. Collected March

15, 1986. (Holotype slide and 9 paratype slides). HOST: Lantana camara L. (Verbenanceae). RELATION TO HOST : Leafs vagrants among the

dense compound hairs, prefering the lower surfaces and causing rusting symptoms.

REMARKS : P. lantanae is similar to P. calisorbi Keifer (1965), but differs in the design of dorsal shield; 1st ventral seta surpassing the 2nd ventral seta; tergites without micro tubercles, and nature of injury to the host. Calisorbi forms erineum, the new species is a leaf vagrant. L. camara as a preferable host plant are also infested with two other species : Eriophyes lantanae Cook (1909), distortion of flo­wer buds, Cuba, and Rhynacus kraussi Keifer (1962), vagrant, Calif., Colombia.

Aculus didymbotryae sp n.

(Fig. 3)

- 161

FEMALE: 195-205 fLm long, 63-68 fLm wide, elon­gate fuiform, yellowish. Rostrum 21 fLm long, pro­jecting down, chelicera 14 fLm long, antapica1 seta 3 fLm long. Shield 35 fLm long, 55 fLm wide, sub­triangular; anterior lobe over rostrum acute. Shield design an indication of an incomplete median line; admedian lines sinuate, arising from tip of anterior lobe, ext"nds divergently backwards the rear shield margins; median and admedians are connected

posteriorly to each other by transverse line forming anchor-shaped caudally; submedian lines sinuate, arising from the sides of anterior shield, run backwards and bifurcated, inner fork free, outer fork connected with dorsal tubercles on rear shield margin; admedian and submedian lines are connec­ted anteriorly t to each other by two short diagonal lines; sides of shield with faint broken lines; dorsal tubercles at rear shield margin, 20 fLm apart; dorsal setae 26 fLm long. Forelegs 32 fLm long; femur 8 fLm long; genu 5 fLm long, seta 20 fLm long; tibia 7 fLm long, seta 6 fLm long; tarsus 6 fLm long, outside seta about 20 fLm long. Claw 8 fLm long, loosely curved, without clear knob at tip. Featherclaw 7-rayed.

FIG. 3 : Aculus didymbotryae n. sp. DA) Anterior dorsal shield; SA) Side view of anterior section of mite; GFI) Female genitalia and anterior section of mite; S) Side view

of adult mite; F) Featherclaw; GM) Male genitalia; ES) Side skin structure.

- 162 Hindlegs 27 [Lm long; femur 7 [Lm long; genu 4 [Lm long, seta 13 [Lm long; tibia 6 [Lm long, without seta; tarsus 6 [Lm long, outside seta about 19 [Lm long. Claw 8 [Lm long, loosely curved, without clear knob at tip. Featherclaw 7-rayed. Coxae blank; anterior coxae contiguous at posterior two thirds with two setae on each; coxal se ate I wider apart than setae II; setae II at base of sternal ridge; posterior coxae contiguous with anterior ones, each with single seta; seta of second coxa about 23 [Lm long. Abdomen with 36 tergites and about 58 sternites. Rings completely micro tuberculate ; micro tubercle rounded, located on rear margin of annular rings, similar dorsally and ventrally, but varying in size. Lateral thanosomal seta 18 [Lm long, on about sternite 10; 1st ventral seta 38 [Lm long, on about sternite 20 ; 2 nd ventral seta 13 [Lm long, on about sternite 35 ; 3rd ventral or telosomal seta 25 [Lm long, on 6th ring from rear. The thanosome with 30 tergites and about 52 sternites. The last 9 rings with fine striations ventrally. Caudal seta arise from a moderate lobe behind the last tergite. Caudal seta about 55 [Lm long; acces­sory seta 4 [Lm long. Female genitalia 12 [Lm long, 20 [Lm wide; coverflap with 12 longitudinal ribs; seta 25 [Lm long.

MALE: 175-185 [Lm long, 61-63 [Lm wide, male genitalia 13 [Lm long, 15 [Lm wide; seta 20 [Lm long.

TYPE LOCALITY: Dar EI-Salam, Tanzania. Col­lected February 15, 1986. (Holotype, allotype slides and 11 paratype slides).

HOST: Cassia didymbotrya L. (Fabaceae). RELATION TO HOST: The mites are vagrant among

the dense compound hairs on the upper surfaces of new and well developed leaves in fairly large numbers, causing rustlike discoloration known as russeting.

REMARKS: A. didymbotryae resembles A. cassiae Mondal & Chakrabarti (1980) and A. cercidii Keifer (1965). It is distinguished by the nature of shield design, in addition, 7-rayed featherclaw, blank coxae, and tergites with rounded micro tuber­cles.

Vasates rhois sp. n.

(Fig. 4)

FEMALE: 175-187.5 [Lm long, 53-57.5 [Lm wide, spindleform; light yellow to yellowish white in colour. Rostrum about 23 [Lm long, curved down­wards, chelicera 21 [Lm long; antapical seta 3 [Lm long. Shield 45 [Lm long, 53 [Lm wide, subtriangular. Anterior shield lobe projecting shortly over rostrum base, but thick in side view. Shield design obsolete except for rear part of incomplete connecting admedian lines between dorsal tubercles, forming nearly V-shaped. Dorsal tubercles 29 [Lm apart, elongate, little ahead of rear shield margin, the seta 17 [Lm long, thick and directed caudad conver­gently. Forelegs 25 [Lm long; femur 9 [Lm long; genu 4 [Lm seta 19 [Lm long; tibia 4.5 [Lm long, seta 3 [Lm long; tarsus 5 [Lm long, outside seta about 16 [Lm long. Claw 7 [Lm long, loosely curved, with slight knob at tip. Featherclaw 4-rayed. Hindlegs 23 [Lm long; femur 8 [Lm long; genu 4 [Lm long, seta 5 [Lm long; tibia 3.5 [Lm long, without seta; tarsus 4.5 [Lm long, outside seta about 15 [Lm long. Claw 7 [Lm long, loosely curved, with slight knob at tip. Featherclaw 4-rayed. Coxa ornamented with lines of granules; anterior coxae with sternal line bet­ween. First setiferous coxal tubercles farther apart than second ones; posterior coxae contiguous with anterior ones, with single seta of about 38 [Lm long. Tergites much wider than sternites, 24 tergites and about 69 sternites present. Abdomen with microtu­bercles on sternites only; micro tubercles similar in size and beadlike, located on posterior margins. Lateral thanosomal seta about 17 [Lm long, on about sternite 10; 1 st ventral seta 40 [Lm long, surpassing 2nd ventral seta, on about sternite 27 ; 2nd ventral seta 22 [Lm long, on about sternite 41 ; 3rd ventral or telosomal seta 15 [Lm long, on 5th ring from rear. The thanosome with 19 rings dorsally and about 64 ventrally. Telosome with fine striations ventrally. Caudal seta about 45 [Lm long; accessory seta 3 [Lm long. Female genitalia 12 [Lm long, 22 [Lm wide, with about 12 irregular furrows which are either longitudinal or curved; seta about 13 [Lm long, arising from moderate tubercle.

- 163-

FIG. 4 : Vas'ates rllOis sp. n.

DA) Anterior dorsal shield; F) FeathercIaw; SA) Side view of anterior section of mite; GFI) Female genitalia and anterior section of mite ; D) Dorsal view of mite; GM) Male genitalia; S) Side view of adult mite.

MALE : 150 [Lm long, 45 [Lm wide. Male genitalia 9 [Lm long, 12 [Lm wide; seta about 10 [Lm long.

TYPE LOCALITY : Dar El-Salam, Tanzania. Col­lected February 15, 1986. (Holotype, allotype slides and 5 paratype slides).

HOST: Rhus sp. (Anacardiaceae). RELATION TO HOST : These mites are usually

found on the upper surface only, around mid-vein of leaves, together with eggs and young ones. In some cases, severe rustings of leaves turned to pale brown were observed.

REMARKS : Position of dorsal tubercles, 4-rayed

featherclaw and the nature of coxae design bring V. rhois sp. n. close to V. physenae Keifer (1973). However, the present new species remains distinct by its shield design in addition to other characters in detail.

ACKNOWLEDGEMENT

We would like to thank Mr. Ehab H. YOUSEF, African fund expert in Tanzania who devoted himself for several weeks to collect and ship the

specimens on this own. Also, thanks are due to Prof. Dr. H. S. SALAMA, President of the National Research Centre, Cairo, for including this work under umbrella of N.R.C. interest.

REFERENCES

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KElFER (H. H.), 1953. - Eriophyid Studies XXI. - Bull. Calif. Dept. Agr., 42 : 65-79.

KElFER (H. H.), 1956. - Eriophyid Studies XXIV. -Bull. Calif. Dept. Agr., 44 : 159-163.

KElFER (H. H.), 1959. - Eriophyid Studies XXVII. -Occas. Paper. Calif. Dept. Agr., 1 : 1-18.

KElFER (H. H.), 1962. - Eriophyid Studies B - 5. Calif. Dept. Agr. : 1-20.

164 -KEIFER (H. H.), 1965. - Eriophyid Studies B - 13. -

Calif. Dept. Agr. : 1-20.

KEIFER (H. H .), 1969. - Eriophyid Studies C - 2. -ARS-USDA : 1-20.

KElFER (H. H.), 1972. - Eriophyid Studies C - 7. -ARS-USDA : 1-24.

KElFER (H. H.), 1973. - Eriophyid Studies C - 8. -ARS-USDA : 1-24.

KEIFER (H. H.), 1974. - Eriophyid Studies C - 9. -ARS-USDA : 1-24.

MONDAL (S.) and CHAKRABARTI (S.), 1980. - Studies on the eriophyid mites (Acarina, Eriophyoidea) of India. VI. - Orient. Insects., 14 : 453-459.

NALEPA (A.), 1988. - Acarina, Eriophyidae. - Das Tierreich, 4 : 45.

SHIMER (H.), 1869. - Description of two Acarians bred from the white maple Acer dasycarpum. - Trans. Am. Entomol. Soc., 2 : 319-320.

Paru en Juillet 1992.