Activities of hexokinase, phosphofructokinase and pyruvate kinase in the body wall, pyloric caeca and tube feet of Asterias vulgaris: Evidence of body wall as a major source of glycolytic activity

Author(s):  
Naoyuki Saito ◽  
Stephen A. Watts
Zootaxa ◽  
2011 ◽  
Vol 2922 (1) ◽  
Author(s):  
MAGALI HONEY-ESCANDÓN ◽  
FRANCISCO A. SOLÍS-MARÍN ◽  
ALFREDO LAGUARDA-FIGUERAS

A new species of sea cucumber of the subgenus Selenkothuria Deichmann, 1958 is described. Holothuria (Selenkothuria) carere n. sp. was found in the Mexican Pacific, from intertidal to 6 m depth. The absences of ossicles in the body wall, as well as in the dorsal and ventral tube feet make this species unique among the species of this subgenus. Smooth straight rods with distal perforations and projections are present only in the dorsal and anal papillae, papillae at the base of the tentacles and in the tentacles. This species is distinctive within the subgenus. The shape of the ossicles shows some similarities with H. (S.) glaberrima Selenka, 1867.


Zootaxa ◽  
2012 ◽  
Vol 3304 (1) ◽  
pp. 63 ◽  
Author(s):  
MARIANO I. MARTINEZ ◽  
MARTÍN I. BROGGER

A new genus and a new species of dendrochirotid, Thandarum hernandezi gen. et sp. nov., is described from Buenos Airescoast in the Southwestern Atlantic. For this species is quite significant the body U shape, up to 14.08 mm (along thetrivium), with double row of podia restricted to the ambulacra. Other features are ossicles from body wall with buttonsand 4 pillar tables, tube feet with rods and end plate star-shaped; the introvert with rosettes and tentacles with rods. Thesecharacteristics require the recognition of a new genus, and the new species and represents the first sclerodactylid reported in Argentinean waters.


Zootaxa ◽  
2009 ◽  
Vol 2096 (1) ◽  
pp. 479-483
Author(s):  
ANTONINA ROGACHEVA ◽  
IAN A. CROSS ◽  
DAVID S. M. BILLETT

A new genus and species of laetmogonid holothurian (Elasipodida, Laetmogonidae), collected from around the Crozet Plateau in the Southern Indian Ocean, is described. It differs from other members of the family in that the body wall lacks the wheel-shaped calcareous deposits completely. Instead only rods are present. The genus is also distinguished by the combination of other morphological characters lacking in other known genera: absence of circum-oral and ventrolateral papillae together with development of midventral tube feet. All other members of the family Laetmogonidae are known to have wheel-shaped deposits, therefore diagnosis of the family is refined.


2016 ◽  
Vol 97 (6) ◽  
pp. 1267-1272
Author(s):  
Roberto Carlos Cerda ◽  
María Luján Flores ◽  
Hector Eliseo Zaixso ◽  
Osvaldo León Córdoba

The sea star Anasterias minuta broods the embryos in the oral region; embryos then block the mouth and prevent the parent from taking up nutrients during the brooding period. Here, we analysed content of carbohydrates in different organs as well as in eggs, embryos and juveniles of A. minuta. We found that these biochemical components are used mainly by the pyloric caeca and the body wall as reserve substances to endure the periods of reduced consumption rates of non-brooding females and males and the long-term starvation of brooding females. The ability to translocate carbohydrates from females to embryos and juveniles observed in other species of sea stars was not confirmed.


Zootaxa ◽  
2020 ◽  
Vol 4878 (3) ◽  
pp. 581-588
Author(s):  
FRANCISCO ALONSO SOLIS-MARIN ◽  
JUAN JOSE ALVARADO ◽  
CARLOS ANDRES CONEJEROS-VARGAS ◽  
ANDREA ALEJANDRA CABALLERO-OCHOA

Pentamera fonsecae n. sp. is described from seven specimens as a new species of Thyonidae from the Pacific coast of Costa Rica. It is distinguished from its congeners by having tables with ladder-shaped spires in the body wall, and tube feet with curved support tables of variable height and tables as those found in the body wall slightly smaller than those from the body wall. This species is distributed in Guanacaste, Costa Rica, from 28.5 to 40 m on muddy bottoms.


1997 ◽  
Vol 17 (4) ◽  
pp. 617-624 ◽  
Author(s):  
Philippe Moerman ◽  
Chris Van Geet ◽  
Hugo Devlieger
Keyword(s):  

Genetics ◽  
1994 ◽  
Vol 137 (2) ◽  
pp. 483-498
Author(s):  
J Ahnn ◽  
A Fire

Abstract We have used available chromosomal deficiencies to screen for genetic loci whose zygotic expression is required for formation of body-wall muscle cells during embryogenesis in Caenorhabditis elegans. To test for muscle cell differentiation we have assayed for both contractile function and the expression of muscle-specific structural proteins. Monoclonal antibodies directed against two myosin heavy chain isoforms, the products of the unc-54 and myo-3 genes, were used to detect body-wall muscle differentiation. We have screened 77 deficiencies, covering approximately 72% of the genome. Deficiency homozygotes in most cases stain with antibodies to the body-wall muscle myosins and in many cases muscle contractile function is observed. We have identified two regions showing distinct defects in myosin heavy chain gene expression. Embryos homozygous for deficiencies removing the left tip of chromosome V fail to accumulate the myo-3 and unc-54 products, but express antigens characteristic of hypodermal, pharyngeal and neural development. Embryos lacking a large region on chromosome III accumulate the unc-54 product but not the myo-3 product. We conclude that there exist only a small number of loci whose zygotic expression is uniquely required for adoption of a muscle cell fate.


1985 ◽  
Vol 260 (22) ◽  
pp. 12228-12233 ◽  
Author(s):  
H Takahashi ◽  
H Komano ◽  
N Kawaguchi ◽  
N Kitamura ◽  
S Nakanishi ◽  
...  

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