A Method of Rearing Bark- and Cambium-Feeding Beetles with particular Reference to Hylobius warreni Wood (Coleoptera: Curculionidae)

1958 ◽  
Vol 90 (7) ◽  
pp. 425-428 ◽  
Author(s):  
G. L. Warren
Keyword(s):  
Life History ◽  
Root System ◽  
Related Species ◽  
Jack Pine ◽  
Closely Related Species ◽  
Inner Bark ◽  
History Of ◽  
Biological Differences

Hylobius warreni Wood is a recently described weevil that was originally confused with Hypomolyx piceus (DeGeer, 1957). The larvae attack the inner bark and cambium of the root system of jack pine, Pinus bankisiana Lamb., and other conifers (Warren, 1956). The life history of this insect is being studied to determine biological differences between it and a closely related species, Hylobius pinicola (Couper). This information is also essential in order to continue detailed studies on the effect of site and other factors on the abundance of H. warreni (Warren, 1956a). The first requirement for fulfilling these objectives is the development of a satisfactory rearing technique.

A comparative study of the life histories of Nematodirus battus and N. filicollis, nematode parasites of sheep

Parasitology ◽  
1959 ◽  
Vol 49 (3-4) ◽  
pp. 374-386 ◽  
Author(s):  
R. J. Thomas
Keyword(s):  
Life History ◽  
Intestinal Mucosa ◽  
Related Species ◽  
Life Histories ◽  
Basic Pattern ◽  
Culture Methods ◽  
Closely Related Species ◽  
Nematode Parasites ◽  
History Of ◽  
Comparative Description

1. The life history of N. battus is described, and a comparative description of the life history of N. filicollis is given.2. The life histories of these two species are compared with those of N. spathiger and N. helvetianus, two closely related species, and are shown to follow the same basic pattern, with minor variations in timing which appear to be specific in nature, and not related to differences in culture methods or host species.3. The pathogenesis of Nematodirus species is discussed and related to the migration of larvae into the intestinal mucosa during development.

Studies on the Life History of Brachylaimus oesophagei Shaldybin, 1953 (Digenea: Brachylaimidae)

1969 ◽  
Vol 43 (1-2) ◽  
pp. 79-98 ◽  
Author(s):  
J. W. Lewis
Keyword(s):  
Life History ◽  
Digestive Gland ◽  
Related Species ◽  
Life Histories ◽  
Common Shrew ◽  
Sorex Araneus ◽  
Morphological Features ◽  
Closely Related Species ◽  
History Of ◽  
The Common

1. Brachylaimus oesophagei Shaldybin, 1953 from the common shrew, Sorex araneus castaneus Jenyns is described and compared with that of Shaldybin (1953) and a closely related species B. fulvus Dujardin, 1843.2. Despite unsuccessful attempts in hatching the egg of B. oesophagei, some morphological features of the miracidium are described and compared with previous studies on brachylaimid miracidia. Neither flame cells nor epidermal plates have been observed in miracidia of this family and present observations confirm this.3. A description is given of the cercaria and metacercaria of B. oesophagei from the kidney of the hollowed snail Zonitoides excavatus (Bean) at Aberystwyth, but no sporocysts or cercariae were found in the digestive gland.4. Previous work on brachylaimid life histories is discussed, together with a resumé of the life history of B. oesophagei.

scholarly journals A revision of the Elachista regificella Sircom -complex (Lepidoptera: Elachistidae)

2001 ◽  
Vol 12 (3) ◽  
Author(s):  
Lauri Kaila ◽  
Bengt Bengtsson ◽  
Ivars Šulcs ◽  
Jari Junnilainen
Keyword(s):  
Life History ◽  
Great Britain ◽  
Host Plant ◽  
Central Europe ◽  
Related Species ◽  
Host Plants ◽  
Closely Related Species

The Elachista regificella complex (Elachistidae) is revised and considered to consist of three closely related species: E. regificella Sircom, presently only recorded from Great Britain, E. geminatella (Herrich-Schäffer), stat. rev. (= E. nieukerkeni Traugott-Olsen, syn. nov.) and E. tengstromi nom. nov. (= E. magnificella Tengström, 1848, nec Duponchel, 1843). The latter two species are widely distributed e.g. in Central Europe, the range of E. tengstromi extending to Japan. The species are diagnosed and illustrated. Life history records indicate that the species have, at least to some extent, different host plant preferences: Luzula sylvatica is recorded as the host plant of E. regificella and E. geminatella, of which the latter probably exploits other host plants as well. L. pilosa is the only known host plant of E. tengstromi in Europe, with further host plants recorded in Japan. Neotypes are designated for Elachista regificella Sircom and Poeciloptilia geminatella Herrich-Schäffer.

The life history of Pleurogenoides malampuzhensis sp. nov. (Digenea: Pleurogenidae) from amphibious and aquatic hosts in Kerala, India

2013 ◽  
Vol 88 (2) ◽  
pp. 230-236 ◽  
Author(s):  
R. Brinesh ◽  
K.P. Janardanan
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Related Species ◽  
Growth And Development ◽  
Systematic Position ◽  
Patent Period ◽  
Hoplobatrachus Tigerinus ◽  
Life Cycle Stages ◽  
Muscle Tissues ◽  
History Of

AbstractThe life-cycle stages of Pleurogenoides malampuzhensis sp. nov. infecting the Indian bullfrog Hoplobatrachus tigerinus (Daudin) and the skipper frog Euphlyctiscyanophlyctis (Schneider) occurring in irrigation canals and paddy fields in Malampuzha, which forms part of the district of Palakkad, Kerala, are described. The species is described, its systematic position discussed and compared with the related species, P. gastroporus (Luhe, 1901) and P. orientalis (Srivastava, 1934). The life-cycle stages, from cercaria to egg-producing adult, were successfully established in the laboratory. Virgulate xiphidiocercariae emerged from the snail Digoniostoma pulchella (Benson). Metacercariae are found in muscle tissues of dragonfly nymphs and become infective to the frogs within 22 days. The pre-patent period is 20 days. Growth and development of both metacercariae and adults are described.

Molecular markers reconstruct the invasion history of variable leaf watermilfoil (Myriophyllum heterophyllum) and distinguish it from closely related species

2011 ◽  
Vol 13 (7) ◽  
pp. 1687-1709 ◽  
Author(s):  
Ryan A. Thum ◽  
Matthew P. Zuellig ◽  
Robert L. Johnson ◽  
Michael L. Moody ◽  
Charles Vossbrinck
Keyword(s):  
Molecular Markers ◽  
Related Species ◽  
Invasion History ◽  
Closely Related Species ◽  
History Of

The Breeding Evidence Indicating Two Genetic Types of Females of Ips tridens Mannerheim) (Coleoptera: Scolytidae)

1964 ◽  
Vol 96 (1-2) ◽  
pp. 117-118 ◽  
Author(s):  
G. R. Hopping
Keyword(s):  
Sex Ratio ◽  
Related Species ◽  
Mortality Factor ◽  
Unexpected Result ◽  
Closely Related Species ◽  
Inner Bark ◽  
Genetic Types ◽  
Stage Of Development ◽  
Gallery System ◽  
Entrance Hole

Members of the genus Ips are polygamous. The male excavates the entrance hole and a small nuptial chamber between the inner bark and sapwood. The females then enter and each excavates an egg gallery starting from the nuptial chamber. The number of females per gallery system ranges from 1 to 5 but the most common number is 3. This sex ratio of approximately 3 ♀ ♀: 1 ♂ has been attributed to some mortality factor more lethal to the males in some stage of development. Breeding of isolated pairs under laboratory conditions was carried out primarily to determine the variability between individuals from the same brood and between individuals from different broods. The objective was to resolve the complex of closely related species in the Ips tridens–I. engelmanni group. An unexpected result was a clarification of the sex ratio problem.

scholarly journals Evolutionary Patterns in the Genus Homo

2021 ◽  
Vol 21 (01) ◽  
Author(s):  
Nisar A. Shar
Keyword(s):  
Related Species ◽  
Homo Sapiens ◽  
Demographic History ◽  
Human Intelligence ◽  
Evolutionary Patterns ◽  
Closely Related Species ◽  
Genus Homo ◽  
Wide Range ◽  
History Of

ABSTRACT The demographic history of Homo sapiens is complex; it involves a wide range of migrations and genetic adaptations. One of the closely related species to Homo sapiens is Neanderthals, which became extinct about 30,000 years ago. The aim of this research is to compare Homo sapiens with Neanderthals and chimpanzees to understand the patterns of inheritance and survival instincts of Homo sapiens. Results show that out of all selected groups of genes in this study, metabolism, and language genes are found to be the most evolving group of genes. This shows that these most evolving genes are contributing to the advancement of Homo sapiens. However, after comparing human intelligence genes with the primates, it is found that exonic regions are contributing more to the evolution of human intelligence hence, making Homo sapiens unique in terms of intelligence.

Evolutionary Ecology of Parental Investment and Larval Diversity

2018 ◽  
Keyword(s):  
Life History ◽  
Parental Investment ◽  
Related Species ◽  
Life History Theory ◽  
Evolutionary Ecology ◽  
Marine Organisms ◽  
Investment Strategies ◽  
Closely Related Species ◽  
Offspring Fitness ◽  
Marine Larvae

Marine larvae vary enormously in the amount of care (be it in the form of energy or other costly caregiving that increases offspring fitness) they receive from their parents. In contrast to terrestrial taxa, parental investment is less coupled to phylogeny in marine taxa, such that closely related species may have wildly different parental investment strategies. Such diversity demands explanation, and marine biologists have been fascinated by variation in parental investment for over 100 years. In this chapter, we review patterns in parental investment in space, review the theory of parental investment in life history theory, explore the key assumptions of life history theory as it pertains to parental investment, and then examine the evolutionary causes and ecological consequences of variation in parental investment for marine organisms.

scholarly journals Eversion and withdrawal of an intromittent organ before sexual maturation prepares male beetles for copulation

2017 ◽  
Vol 4 (8) ◽  
pp. 161029 ◽  
Author(s):  
Yoko Matsumura ◽  
Takuya Kubo
Keyword(s):  
Phylogenetic Tree ◽  
Sexual Maturation ◽  
Related Species ◽  
Evolutionary History ◽  
Active State ◽  
Surface Structures ◽  
Closely Related Species ◽  
Spermathecal Duct ◽  
History Of ◽  
Coiled State

Some species of criocerine beetles have a hyper-elongated part of the intromittent organ called a flagellum. In resting position, the flagellum is stored in a specialized internal sac in the intromittent organ. This specialized state of the flagellum and internal sac is indispensable during copulation for flagellar insertion into the female spermathecal duct for sperm transfer. However, the morphogenesis of the flagellum does not generate the active state of the flagellum; rather, the flagellum is generated in an inactive and completely coiled state. After eclosion, males of Lema coronata evert and withdraw the internal sac multiple times before sexual maturation, without mounting a female. This behaviour serves to uncoil the flagellum and guide it into the active state with the aid of surface structures on the internal sac. A closely related species, Lema dilecta , also has a long flagellum and undergoes the same behaviour to place the flagellum in the active position. However, some other species of criocerine beetles with much shorter flagella can attain the active state without exhibiting this behaviour. Based on a previously proposed phylogenetic tree, we discuss the evolutionary history of the hyper-elongation of the flagellum and associated behaviour.

A Note on the Life History of Cimberis elongatus (Lec.) (Coleoptera: Anthribidae)

1961 ◽  
Vol 93 (5) ◽  
pp. 406-408 ◽  
Author(s):  
J. B. Thomas ◽  
H. Herdy
Keyword(s):  
Life History ◽  
Bark Beetle ◽  
Pinus Banksiana ◽  
Jack Pine ◽  
Insect Damage ◽  
History Of ◽  
Shoot Damage

Insect damage to jack pine shoots (Pinus banksiana Lamb.) in the Lake Nipigon region of Ontario was first reported by Thomas and Lindquist (1956). Since then, a study of insects infesting jack pine shoots has shown that a bark beetle, Conophthorus sp., has been chiefly responsible for shoot damage. A secondary borer, Cimberis elongatus (Lec.), was usually associated with the bark beetle, and because little has been published on the biology of any of the anthribids, the general life history of C. elongatus is outlined here.

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