Results 191 to 200 of about 2,889 (214)

The first record of the genus Helobdella (Hirudinoidea: Glossiphoniidae) from Australia, with a description of a new species, Helobdella papillornata

Hydrobiologia, 1998
The first species of the genus Helobdella in Australia is recorded from Victoria. Helobdella papillornata has all of the diagnostic features of the genus including: triannulate segments, one pair of eyes on somite II, diffuse salivary glands, five crop caeca, one annulus between the gonopores and one annulus between the anus and the caudal sucker.
Fredric R. Govedich, Ronald W. Davies
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Expression patterns of duplicated snail genes in the leech Helobdella

Development Genes and Evolution, 2017
snail gene family members are zinc-finger transcription factors with key roles in morphogenesis. Involvement of snail family genes in mesoderm formation has been observed in insects and mammals. The snail genes are also involved in cell motility, neural differentiation, cell fate, survival decision, and left-right identity. The functions of snail genes
Jin-Se, Kim, Hee-Jin, Kwak, Brenda Irene, Medina Jiménez, Soon Cheol, Park, Ping, Xiao, David A, Weisblat, Sung-Jin, Cho   +6 more
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Cell interactions in the developing epidermis of the leech Helobdella triserialis

Developmental Biology, 1984
In embryonic development of the leech Helobdella triserialis, each of the four paired ectodermal teloblasts contributes some progeny to a characteristic dorsal or ventral territory of the epidermis. To ascertain the relative roles of cell lineage and cell interactions in generating the highly regular epidermal distribution pattern of the various ...
S S, Blair, D A, Weisblat
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Establishment of segment polarity in the ectoderm of the leech Helobdella

Development, 2001
ABSTRACT The segmented ectoderm and mesoderm of the leech arise via a stereotyped cell lineage from embryonic stem cells called teloblasts. Each teloblast gives rise to a column of primary blast cell daughters, and the blast cells generate descendant clones that serve as the segmental repeats of their particular teloblast lineage.
E C, Seaver, M, Shankland
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Expression of actin mRNA in embryos of the leech Helobdella triserialis

The International Journal of Developmental Biology, 1998
A cDNA clone (Htr-actin) containing a 1.48 kb insert corresponding to actin was isolated from a stage 10-11 Helobdella triserialis cDNA library by cross hybidization to a Drosophila melanogaster actin clone. The cDNA is equivalent in size to the adult actin mRNA detected by Northern analysis.
C J, Wedeen, N B, Figueroa
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Microinjection of Helobdella (leech) embryos.

Cold Spring Harbor protocols, 2010
One advantage of using Helobdella (leech) embryos as an experimental system is their amenability for microinjection. Blastomeres ranging in size from the zygote (400 microm diameter) down to micromeres and primary blast cells (approximately 20 microm diameter) can be injected by pressure under a dissecting microscope.
David A, Weisblat, Dian-Han, Kuo
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The fine structure of the eye of the leech, Helobdella stagnalis

Journal of Cell Science, 1967
Abstract The eye of the rhynchobdellid leech, Helobdella stagnalis, has been examined with the electron microscope. The eye is composed of a cup of pigment cells surrounding a compact mass of photoreceptor cells. In addition to pigment granules, the pigment-cell cytoplasm is characterized by mitochondria, a Golgi complex, and profiles of
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Correction of the specific epithet in Helobdella serendipitous Saglam et al. 2018 (Annelida: Hirudinea) as Helobdella serendipitosa, in accordance with Latin grammar

Zootaxa
Saglam, Naim, Shain, Daniel H. (2025): Correction of the specific epithet in Helobdella serendipitous Saglam et al. 2018 (Annelida: Hirudinea) as Helobdella serendipitosa, in accordance with Latin grammar. Zootaxa 5647 (5): 499-500, DOI: 10.11646/zootaxa.5647.5.9, URL: https://doi.org/10.11646/zootaxa.5647.5 ...
NAIM SAGLAM, DANIEL H. SHAIN
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The occurrence of an Australian leech species (genus Helobdella) in German freshwater habitats as revealed by mitochondrial DNA sequences

Molecular Phylogenetics and Evolution, 2004
Bertram Brenig, U Kutschera
exaly   +2 more sources

Description of a new leech species from North America,Helobdella austinensisn. sp. (Hirudinea: Glossiphoniidae), with observations on its feeding behaviour

Zoosystematics and Evolution, 2013
U Kutschera, Dian-Han Kuo, David A Weisblat   +2 more
exaly