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BRIEF NOTES ON THE CYTOLOGY OF NEOTROPICAL COLEOPTERA. III. OLUPERODES ANTILLARUM BLAKEPSI = LYSATHIA LUDOVICIANA (FALL)VIRKKI N.1979; J. AGRIC. UNIV. P.R.; PRI; DA. 1979; VOL. 53; NO 1; PP. 100-101; 1 ILL.; NOTE DE RECHERCHEArticle

PRE-REDUCTION OF THE X CHROMOSOME IN LYCIDAE (COLEOPTERA: CANTHAROIDEA)VIRKKI N.1978; GENETICA; NLD; DA. 1978; VOL. 49; NO 2-3; PP. 229-232; BIBL. 11 REF.Article

OVARIOLE NUMBERS IN TWO PUERTO RICAN OEDIONYCHINA (COLEOPTERA)VIRKKI N.1979; J. AGRIC. UNIV. P.R.; PRI; DA. 1979; VOL. 53; NO 1; PP. 50-56; ABS. SPA; BIBL. 18 REF.; 1 ILL.Article

RESPONSE OF AN OEDIONYCHINA (COLEOPTERA) KARYOTYPE TO ACUTE GAMMA RADIATIONVIRKKI N.1979; J. AGRIC. UNIV. PUERTO RICO; PRI; DA. 1979; VOL. 63; NO 2; PP. 116-145; ABS. SPA; BIBL. 41 REF.; 19 ILL.Article

BRIEF NOTES ON THE CYTOLOGY OF NEOTROPICAL COLEOPTERA. II. APATE MONACHA F. (BOSTRYCHIDAE).VIRKKI N.1977; J. AGRIC. UNIV. PUERTO RICO; PUERTO RICO; DA. 1977; VOL. 61; NO 4; PP. 519-520; BIBL. 8 REF.Article

FURTHER CHRYSOMELIDS WITH AN X+Y SEX CHROMOSOME SYSTEM: MEGALOPODINAEVIRKKI N.1983; HEREDITAS; ISSN 0018-0661; SWE; DA. 1983; VOL. 98; NO 2; PP. 209-213; BIBL. 14 REF.Article

FLEABEETLES, ESPECIALLY OEDIONYCHINA, OF A PUERTO RICAN MARSHLAND IN 1969-72VIRKKI N.1980; J. AGRIC. UNIV. PUERTO RICO; PRI; DA. 1980; VOL. 64; NO 1; PP. 63-92; ABS. SPA; BIBL. 41 REF.Article

The sex chromosomes of Diconychina (Coleoptera, Alticinae): Xy+nX systemsVIRKKI, N.Cytobios. 1988, Vol 53, Num 212, pp 43-55, issn 0011-4529Article

DEMES OF A PUERTO RICAN FLEABEETLE, ALAGOASA BICOLOR (L.), DIFFERING IN MEAN BODY SIZE AND FOODPLANT ASSOCIATIONVIRKKI N; ZAMBRANA I.1980; J. AGRIC. UNIV. P.R; ISSN 0041-994X; PRI; DA. 1980; VOL. 64; NO 3; PP. 264-274; BIBL. 19 REF.Article

Proximal vs. distal collochores in Coleopteran chromosomesVIRKKI, N.Hereditas (Landskrona). 1989, Vol 110, Num 2, pp 101-107, issn 0018-0661Article

ON THE CYTOLOGY OF UMBONIA CRASSICORNIS (AMYST & SERVILLE) (HOMOPTERA: MEMBRACIDAE: HOPLOPHORIONINAE).ESCUDERO J; VIRKKI N.1976; J. AGRIC. UNIV. PUERTO RICO; PUERTO RICO; DA. 1976; VOL. 60; NO 2; PP. 238-247; ABS. ESP.; BIBL. 21 REF.Article

Banding of Oedionychina (Coleoptera: Alticinae) chromosomes: C- and Ag-bandsVIRKKI, N.1983, Vol 67, Num 3, pp 221-255Article

DEMES OF A PUERTO RICAN FLEABEETLE, ALAGOASA BICOLOR (L.), DIFFERING IN MEAN BODY SIZE AND FOODPLANT ASSOCIATIONVIRKKI N; ZAMBRANA I.1980; J. AGRIC. UNIV. P.R.; ISSN 0041-994X; PRI; DA. 1980; VOL. 64; NO 3; PP. 264-274; BIBL. 19 REF.Article

DISTRIBUTION OF NUCLEAR PORES AND PERINUCLEARDENSE SUBSTANCES IN SPERMATOCYTES I OF SOME OEDIONYCHINA FLEABEETLESVIRKKI N; KIMURA M.1978; BIOSYSTEMS; NLD; DA. 1978; VOL. 10; NO 3; PP. 213-225; BIBL. 2 P.Article

Silver staining of the elements of spermatogenesis in Oedionychina (Chrysomelidae: Alticinae)VIRKKI, N; DENTON, A.Hereditas (Landskrona). 1987, Vol 106, Num 1, pp 37-49, issn 0018-0661Article

Trends of karyotype evolution in neotropical oedionychina (Coleoptera:Chrysomelidae:Alticinae)VIRKKI, N; SANTIAGO-BLAY, J. A.Hereditas (Landskrona). 1993, Vol 119, Num 3, pp 263-283, issn 0018-0661Article

On the XO sex chromosome system of Aulacoscelis melanocera Stål (Aulacoscelinae: Chrysomelidae: Coleoptera)SANTIAGO-BLAY, J. A; VIRKKI, N.Hereditas (Landskrona). 1989, Vol 111, Num 2, pp 99-102, issn 0018-0661Article

Silver staining of the coleopteran Xyp sex bivalentVIRKKI, N; MAZZELLA, C; DENTON, A et al.Cytobios. 1991, Vol 67, Num 268, pp 45-63, issn 0011-4529Article

Structure, orientation, and segregation of the sex trivalent in Pyrophorus luminosus Ill. (Coleoptera, Elateridae)VIRKKI, N; FLORES, M; ESCUDERO, J et al.Canadian journal of genetics and cytology. 1984, Vol 26, Num 3, pp 326-330, issn 0008-4093Article

Cytology and systematical position of stylopids (= Strepsiptera)FERREIRA, A; CELLA, D. M; MESA, A et al.Hereditas (Landskrona). 1984, Vol 100, Num 1, pp 51-52, issn 0018-0661Article

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