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Figure 5 in Cytological evidence for automictic thelytoky in parthenogenetic oribatid mites (Acari, Oribatida): Synaptonemal complexes confirm meiosis in Archegozetes longisetosus

Figure 5 Archegozetes longisetosus. Peripheral oocyte of a tritonymph, showing oocyte extension and dense bundle of microtubuli passing the vicinity of the nuclear envelope. Nuclear envelope with numerous nuclear pores. Abbreviations: MT: microtubuli, NP: nuclear pores.

Figure 4 in Cytological evidence for automictic thelytoky in parthenogenetic oribatid mites (Acari, Oribatida): Synaptonemal complexes confirm meiosis in Archegozetes longisetosus

Figure 4 Archegozetes longisetosus.Ovary of a 5 day old tritonymph: a – Overview, parasagittal plane; b – detail of central region; c – detail

Figure 3 in Cytological evidence for automictic thelytoky in parthenogenetic oribatid mites (Acari, Oribatida): Synaptonemal complexes confirm meiosis in Archegozetes longisetosus

Figure 3 Archegozetes longisetosus.Synaptonemal complexes in oocytes of a two day old tritonymph: a-c: Three pachytene nuclei; d-g details: Synaptonemal complexes in longitudinal (d), (e), and transversal (f), (g) section. Abbreviations: CE: central element, LE: lateral element, SC: synaptonemal complex, TE: transversal element.

Figure 2 in Cytological evidence for automictic thelytoky in parthenogenetic oribatid mites (Acari, Oribatida): Synaptonemal complexes confirm meiosis in Archegozetes longisetosus

Figure 2 Archegozetes longisetosus.Germ cells in meiotic prophase of a two day old tritonymph: a – Pachytene cell with SC attached to the nuclear envelope; b – putative later stage with prominent nucleoli, from more peripheral region of the ovary. Abbreviations: AP: attachment

Figure 6 in Cytological evidence for automictic thelytoky in parthenogenetic oribatid mites (Acari, Oribatida): Synaptonemal complexes confirm meiosis in Archegozetes longisetosus

Figure 6 Archegozetes longisetosus: a – Vitellogenetic oocyte from the ovary of an adult female; b – Nuclear envelope with numerous nuclear

Figure 1 in Cytological evidence for automictic thelytoky in parthenogenetic oribatid mites (Acari, Oribatida): Synaptonemal complexes confirm meiosis in Archegozetes longisetosus

Figure 1 Archegozetes longisetosus.Overview of the arrangement of germ cells and somatic tissue in the ovary of a two day old tritonymph: a – Rostro-medially; b – centrally in the ovary. Abbreviations: BL: basal lamina, NP: nuclear pores, OE: oocyte extension, SC: synaptonemal complex, ST: somatic tissue.

Fig. 5 in The effect of X-rays on cytological traits of Tuta absoluta (Lepidoptera: Gelechiidae)

Fig. 5. Eupyrene spermatozoa in the bursae copulatrices of females mated either with irradiated or with non-irradiated males. (a) Normal eupyrene spermatozoon; (b) abnormal eupyrene spermatozoon. Bar = 100 µm. Arrowhead indicates distinctive angle observed in abnormal eupyrene spermatozoa.

Fig. 6 in The effect of X-rays on cytological traits of Tuta absoluta (Lepidoptera: Gelechiidae)

Fig. 6. Ratio of normal, abnormal, and uncertain eupyrene spermatozoa relative to total eupyrene spermatozoa (mean ± SE) measured afer completion of copula.

Fig. 2 in The effect of X-rays on cytological traits of Tuta absoluta (Lepidoptera: Gelechiidae)

Fig. 2. Cytogenetic analysis of the F1 generation of irradiated males. (a) Male mitotic metaphase with chromosomal fragments and fusions; (b) male pachytene complement with chromosomal multivalents; (c) male metaphase I with multivalents and chromosomal fragments.Bar = 10 µm. Arrowheads indicate chromosomal fragments;arrow indicates multivalents;and asterisks indicate chromosome fusion.

Fig. 4 in The effect of X-rays on cytological traits of Tuta absoluta (Lepidoptera: Gelechiidae)

Fig. 4. Apyrene to eupyrene sperm ratios in irradiated and non-irradiated males. (a) Apyrene to eupyrene sperm ratio in males irradiated at different X-ray doses (mean ± SE); (b) ratio of normal eupyrene bundles relative to total sperm bundles (mean ± SE); (c) ratio of deformed eupyrene bundles relative to total sperm bundles (mean ± SE). Columns with different letters in graph are statistically different (P <0.05).

Fig. 3 in The effect of X-rays on cytological traits of Tuta absoluta (Lepidoptera: Gelechiidae)

Fig. 3. Cytogenetic analysis of eupyrene and apyrene sperm in Tuta absoluta. (a) Normal eupyrene sperm bundle; (b) apyrene sperm bundle; (c) deformed eupyrene sperm bundle. Bar = 100 µm. Arrow indicates eupyrene sperm nuclei; arrowhead indicates micronuclei.

Fig. 1 in The effect of X-rays on cytological traits of Tuta absoluta (Lepidoptera: Gelechiidae)

Fig. 1. Cytogenetic analysis of non-irradiated T. absoluta individuals. (a) Female mitotic metaphase; (b) male mitotic metaphase; (c) female pachytene complement with a WZ bivalent identified according to W-chromosome heterochromatin; (d) male pachytene complement; (e) a highly polyploid female nucleus of Malpighian tubule cells with a large sex chromatin body; (f) a male nucleus of Malpighian tubule cells without W chromatin. Bar = 5 µm (a,b); 10 µm (c,d); 20 µm (e,f). Arrowheads indicate largest chromosomes of the complement, i.e., W and Z sex chromosomes; and arrow indicates sex chromatin.

Fig. 18 in Hybridization Between Parthenogenetic Lizards (Aspidoscelis neomexicana) and Gonochoristic Lizards (Aspidoscelis sexlineata viridis) in New Mexico: Ecological, Morphological, Cytological, and Molecular Context

Fig. 18. Electrophoretic phenotypes of five proteins as expressed on separate gels. PEPA, a dimeric enzyme, for three lizards. LDH1, a tetrameric enzyme, for three lizards. ESTD, a dimeric enzyme, for three lizards. sMDH, a dimeric enzyme, for four lizards. TF, a monomeric enzyme, for six lizards; white dots mark the three isozymes from the hybrid. Letters below gel identify allozymes based on alleles present (table 13). Lanes for individual lizards are labeled beside the gel (with genotype) as follows: I, A. inornata; M, A. tigris marmorata; N, A. neomexicana; NC, A. neomexicana from Conchas Lake; NF, A. neomexicana from Fort Sumner; N 3 S, the hybrid; S, A. sexlineata viridis. Anode is to the right, ^ indicates relative position of sample applications.

Fig. 17 in Hybridization Between Parthenogenetic Lizards (Aspidoscelis neomexicana) and Gonochoristic Lizards (Aspidoscelis sexlineata viridis) in New Mexico: Ecological, Morphological, Cytological, and Molecular Context

Fig. 17. Karyotype of a triploid whiptail lizard (AMNH R151739; 3n 5 69) from Conchas Lake, San Miguel County, New Mexico. This is a hybrid between A. neomexicana 3 A. sexlineata viridis. The three haploid genomes (two rows of chromosomes each) are arranged to illustrate ancestry of the hybrid, as follows: A. tigris marmorata (top) 3 A. inornata (middle), which were inherited from the diploid maternal parent of the hybrid (A. neomexicana), and A. sexlineata viridis (bottom), from the paternal parent. Bar 5 10 mm.

Fig. 16 in Hybridization Between Parthenogenetic Lizards (Aspidoscelis neomexicana) and Gonochoristic Lizards (Aspidoscelis sexlineata viridis) in New Mexico: Ecological, Morphological, Cytological, and Molecular Context

Fig. 16. Pattern of morphological distinctiveness expressed by the distribution of canonical variate scores derived from a linear canonical variate analysis of eight meristic characters in 49 A. neomexicana (Ơ), 26 A. sexlineata viridis (m 5? and M 5 /), 13 A. neomexicana 3 A. sexlineata viridis (v 5? and V 5 /), AMNH 144085 5 UADZ 3272 (3, assigned to the hybrid group as indicated by Walker et al., 1990), OMNH 35109 (1, assigned to the hybrid group as suspected by B.E. Leuck), and 26 A. tesselata C (n) from Conchas Lake, San Miguel County, New Mexico. Ellipses represent the 95% confidence limits of each group.

Fig. 10 in Hybridization Between Parthenogenetic Lizards (Aspidoscelis neomexicana) and Gonochoristic Lizards (Aspidoscelis sexlineata viridis) in New Mexico: Ecological, Morphological, Cytological, and Molecular Context

Fig. 10. Unusual dorsal pattern in OMNH 35109, a putative hybrid female, SVL 69 mm, of Aspidoscelis neomexicana 3 A. sexlineata viridis from South of Clabberhill Ranch (CL1*), Conchas Lake, San Miguel County, New Mexico.

Fig. 9 in Hybridization Between Parthenogenetic Lizards (Aspidoscelis neomexicana) and Gonochoristic Lizards (Aspidoscelis sexlineata viridis) in New Mexico: Ecological, Morphological, Cytological, and Molecular Context

Fig. 9. Life colors in three lizards used in genetic studies. A. Diploid Aspidoscelis neomexicana adult female, AMNH R151740, SVL 72 mm, Cove Campground (CL13), Conchas Lake, San Miguel County, New Mexico. B. Triploid Aspidoscelis neomexicana 3 A. sexlineata viridis hybrid male, AMNH R151739, SVL 74 mm, from South Recreation Area (CL2*), Conchas Lake, San Miguel County, New Mexico. C. Diploid A. sexlineata viridis adult male, AMNH R108142, SVL 69 mm, from Kiowa County, Colorado.

Fig. 3. A in Hybridization Between Parthenogenetic Lizards (Aspidoscelis neomexicana) and Gonochoristic Lizards (Aspidoscelis sexlineata viridis) in New Mexico: Ecological, Morphological, Cytological, and Molecular Context

Fig. 3. A relatively stable topographically and ecologically complex area located north of the Canadian River and east of Conchas Lake Dam as viewed from the south side of the river, San Miguel County, New Mexico. North of Canadian River (CL4); V near middle shows the area with openstructured mesquite, grassesweeds, and junipers along an unpaved road on the upper bench near a precipice from which individuals of Aspidoscelis neomexicana, A. tesselata C, and A. exsanguis, but not A. sexlineata viridis or A. tesselata D, have been collected; lower V shows bench near the river with dense mesquite, grasses, and weeds in which only individuals of A. neomexicana have been observed. The presence of Aspidoscelis neomexicana along the rocky precipice at CL4, from which it flees into the boulders below when threatened, makes this site the most unusual known to us for the species throughout its range.

Fig. 13. Subadult Aspidoscelis neomexicana 3 A in Hybridization Between Parthenogenetic Lizards (Aspidoscelis neomexicana) and Gonochoristic Lizards (Aspidoscelis sexlineata viridis) in New Mexico: Ecological, Morphological, Cytological, and Molecular Context

Fig. 13. Subadult Aspidoscelis neomexicana 3 A. sexlineata viridis hybrids from components of the South Recreation Area (CL2*), Conchas Lake, San Miguel County, New Mexico. A. UADZ 7561?, CL2J*, SVL 49 mm. B. UADZ 7556 /, CL2H*, SVL 49 mm. C. UADZ 7555 /, CL2H*, SVL 47 mm. D. UADZ 7452?, CL2H*, SVL 37 mm. E. UADZ 7448?, CL2H*, SVL 45 mm. F. UADZ 7455 /, CL2C*, SVL 48 mm.