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10 results for “Acrocercops”
Leaf miners (Acrocercops species) larvae performance on young leaves of Manilkara bidentata
Manilkara bidentata is attacked by a specialist leaf miner(Acrocercops sp.(microlepidoptera:gracillariidae). More than one larvae can be found per mine within a leaf. The purposes of this study is to determine the effect of group feeding for this species since larval density within a leaf vary from 1-14 larvae per mine (Angulo-Sandoval personal observation). This variation allows to determine the effect of larval density on the amount of leaf damage, larval survivorship and larval growth. Leaves with mines varied in area from 10 to 224 cm2 (mean = 85.7 cm2) and the number of larvae per leaf ranged from 1 to 14 (mean = 5.7 larvae/mine). There was no relation between the size of the leaf and the number of larvae found within the leaf. There was a relationship between the number of larvae in a blotch mine and amount of damaged tissue. Herbivory increases from approximately 10% for one larva per leaf to 50% in leaves with eight larvae. In leaves with more than eight larvae, herbivory decreased . There was an effect of initial larval density on percent larval survivorship.Survivorship was high (70%) in leaves with one to three larvae. In intermediate density (4-8 larvae per mine) 50% of larvae survived and in high densities (9 - 14 larvae per mine), only 22% survived. Even though there was a decrease in larvae number in high densities, the final number of larvae remained higher, compared with low or intermediate densities. A linear relationship was found between number of larvae present in the leaf and the time it took the larvae to complete their larval stage. Larvae in high density (> 9 larvae per mine) tended to develop faster (3-8 days) than larvae in low densities (5 - 10 days). Larval size upon emergence ranged from 8 to 12 mm (mean= 9.27) but there was no effect of larval density on the final larval size. The total number of surviving larvae varied according to the initial larval number and was highest in mines with eight individuals of which on average 4.7 su
Figure 3 in Distinct parasitoid communities associated with host races of the leaf-mining moth Acrocercops transecta on distantly related host plants (Juglandaceae and Ericaceae)
Figure 3. Lateral view of female Aneurobracon philippinensis.
Figure 2 in Distinct parasitoid communities associated with host races of the leaf-mining moth Acrocercops transecta on distantly related host plants (Juglandaceae and Ericaceae)
Figure 2. Map of Japan showing the sampling localities of Acrocercops transecta mines.
Data from: Differential introgression causes genealogical discordance in host races of Acrocercops transecta (Insecta: Lepidoptera)
Recently diverged populations often exhibit incomplete reproductive isolation, with a low level of gene flow continuing between populations. Previous studies have shown that, even under a low level of gene flow, genetic divergence between populations can proceed at the loci governing local adaptation and reproductive isolation but not at other neutral loci. A leaf-mining moth, Acrocercops transecta, consists of Juglans- and Lyonia-associated host races. The two host races differ in host preferences of ovipositing females and in larval adaptation to host plants but mate readily in the laboratory, producing fertile hybrids. The Juglans and Lyonia races are often sympatric in the wild, implying that gene introgression could occur in nature between the two host races. We tested this hypothesis by combining phylogenetic analyses with coalescent simulations, focusing on mitochondrial genes (COI and ND5) and the nuclear Tpi, Per and Ldh genes located on the Z-chromosome. The mitochondrial genes clearly distinguished the Lyonia race from the Juglnas race, whereas the Tpi, Per and Ldh genealogies did not reflect the two host races. Coalescent simulations indicated gene flow at the three Z-linked genes in both directions, whereas there was no introgression in the mitochondrial genes. The lack of introgression in mitochondrial genes suggests that female host preference is the primary force leading to the bifurcation of maternally inherited loci. Thus, the results show that a low level of gene flow coupled with the inflexible female host preference differentiates histories of divergence between maternally and biparentally inherited genes in this host race system.
FIGURE 3. Acrocercops gossypii, male. A in New species, new country distribution records, and a new generic combination of Afrotropical Acrocercopinae (Lepidoptera: Gracillariidae)
FIGURE 3. Acrocercops gossypii, male. A, adult, scale bar 1 mm; B, head, frontal view; C, genitalia, general view (aedeagus removed); D, aedeagus; E, cornuti; F, caudal part of abdominal pelt, gen. prep. VS563. Scale bar 0.1 mm.
Data from: Differential introgression causes genealogical discordance in host races of Acrocercops transecta (Insecta: Lepidoptera)
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Figure 4 in Distinct parasitoid communities associated with host races of the leaf-mining moth Acrocercops transecta on distantly related host plants (Juglandaceae and Ericaceae)
Figure 4. Modes of parasitism of parasitoids attacking Acrocercops transecta. (A) An ovipositing female of Aneurobracon philippinensis. Before finding host larvae, females track host mines by drumming with their antennae; (B) a final instar of A. transecta that is making a cocoon; (C) a dissected cocoon of A. transecta. A prepupa of A. transecta (upper side) is fed upon by a larva of An. philippinensis (under side); (D) a pupa of An. philippinensis in the cocoon made by A. transecta; (E) a pupa of Choeras sp. in the cocoon made by A. transecta; (F) a final instar of A. transecta parasitized by Pholetesor sp. A hole is visible on the right side of the second abdominal segment from which a Pholetesor sp. larva exits the host; (G) a cocoon of Pholetesor sp. formed inside its host's mine; (H) a Eulophidae larva feeding inside its host's body; (I) a Eulophidae pupa formed inside its host's mine.
Figure 1 in Distinct parasitoid communities associated with host races of the leaf-mining moth Acrocercops transecta on distantly related host plants (Juglandaceae and Ericaceae)
Figure 1. Leaf mines of Acrocercops transecta. (A) Three mines of the Juglandaceae race on a leaflet of Juglans mandshurica; (B) a mine of the Lyonia race on Lyonia ovalifolia.
Figures 2-8 from: Ahmad Z, Ghramh HA (2018) A new species of Chelonus (Areselonus) (Hymenoptera, Braconidae) from India reared from Acrocercops lysibathra (Meyrick) on Cordia latifolia Roxb. ZooKeys 737: 75-80. https://doi.org/10.3897/zookeys.737.20835
Figures 2-8 Chelonus spinigaster sp. n., female, holotype. 2 Fore wing 3 hind leg 4 antenna of female 5 antenna (of male) 6 metasoma, dorsal aspect 7 metasoma, lateral view 8 apex of metasoma, lateral aspect.
Figure 1 from: Ahmad Z, Ghramh HA (2018) A new species of Chelonus (Areselonus) (Hymenoptera, Braconidae) from India reared from Acrocercops lysibathra (Meyrick) on Cordia latifolia Roxb. ZooKeys 737: 75-80. https://doi.org/10.3897/zookeys.737.20835
Figure 1 Chelonus spinigaster sp. n., female, holotype, habitus, lateral aspect.
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