Fatkullina imitata n. sp., second species of a unique cheilostome bryozoan genus with reversed-polarity zooidal budding, and new family Fatkullinidae

Zootaxa ◽  
2018 ◽  
Vol 4508 (1) ◽  
pp. 68 ◽  
Author(s):  
ANDREI V. GRISCHENKO ◽  
DENNIS P. GORDON ◽  
TARAS B. MOROZOV
Keyword(s):  
Sea Of Okhotsk ◽  
Type Species ◽  
Western Kamchatka ◽  
The Sea Of Okhotsk ◽  
New Family ◽  
Reversed Polarity ◽  
Western Kamchatka Shelf ◽  
Upper Slope

A second species of the unique cheilostome bryozoan genus Fatkullina, with reversed-polarity zooidal budding, has been discovered. Fatkullina imitata n. sp. is described from the western Kamchatka shelf and upper slope of the Sea of Okhotsk. It differs from the type species, F. paradoxa, by the combination of orificial characters, the convex distal third of the frontal shield, and predominantly crimson coloration of dry colonies. A new family, Fatkullinidae, is erected to accommodate Fatkullina (as the type genus) and also Stomacrustula, Pachyegis and Lepralioides. The origin of reversed polarity zooidal budding is considered to arise as a consequence of the unique T-shaped geometry of the ancestrula and transverse daughter zooid followed by spiral budding of periancestrular and succeeding generations of zooids within the zone of astogenetic change. 

Polysertularella polyseriata, a new genus and species of hydroid (Hydrozoa; Leptothecata; Sertulariidae) from the Sea of Okhotsk

Zootaxa ◽  
2011 ◽  
Vol 3107 (1) ◽  
pp. 59
Author(s):  
ALEXANDER ANTSULEVICH
Keyword(s):  
Differential Diagnosis ◽  
Sea Of Okhotsk ◽  
Type Species ◽  
New Genus ◽  
New Genera ◽  
New Genus And Species ◽  
The Sea Of Okhotsk ◽  
The Family ◽  
Stem Type ◽  
A New Species

Polysertularella polyseriata, gen. et sp. nov., a hydroid referable to family Sertulariidae, is described from the eastern part of the Sea of Okhotsk. The new taxa is characterized by: multi-serial (5–8 rows) placement of hydrothecae on both stem and branches; a hydrothecal rim with four small cusps; an operculum with four equal flaps similar to but more flattened than that of Sertularella. Gonothecae are transversely corrugated and resemble those of many species assigned to Sertularella and Symplectoscyphus. They arise from hydrothecae-like tubes on the basal part of the stem and are disposed in opposite pairs, as in species of Synthecium.Sertulariidae, the largest family in Hydrozoa and with representatives from marine environments worldwide, is relatively well known. Discovery of new genera in the family is relatively infrequent. A diagnosis of a new genus and a description of a new species are given in this paper.Diagnosis. Sertulariidae with erect, branched colonies, with branches resembling hydrocaulus. Hydrothecae arranged in 5–8 longitudal rows along hydrocaulus and branches; hydrothecal rim with four very low cusps separated by shallow embayments; operculum of four equal triangular valves, flattened rather than pyramidal; hydranth with abcauline caecum. Gonothecae oval with strong transverse corrugations and rings, occurring in opposite pairs on lower part of stem. Type species. Polysertularella polyseriata, sp. n., designated herein. Notes and differential diagnosis. In most genera of Sertulariidae, hydrothecae have an alternate to opposite biserial arrangement on branches, and especially on the stem. A few genera in the family, including Abietinaria Kirchenpauer, 1884, Thuiaria Fleming, 1828, Sertularia Linnaeus, 1758, and Staurotheca Allman, 1888 include some species with multi-serial rows of hydrothecae on branches and very rarely on the stem as well. The nominal genus Selaginopsis Allman, 1876, originally established for sertulariids having hydrothecae in more than two longitudinal rows, is no longer recognized as valid in some works because of its artificial composition and differences among included species in operculum structure (Peña-Cantero et al., 1997). However, no species with a multiserial arrangement of hydrothecae and four-flapped operculum (resembling Sertularella) has been known in the family until now.

THE KELP SPECIES OF WESTERN KAMCHATKA

2020 ◽  
pp. 37-53
Author(s):  
N.G. Klochkova ◽  
◽  
A.V. Klimova ◽  
T.A. Klochkova ◽  
◽  
...  
Keyword(s):  
Coastal Area ◽  
Sea Of Okhotsk ◽  
Age Groups ◽  
Point Of View ◽  
Saccharina Latissima ◽  
Morphometric Characteristics ◽  
Western Kamchatka ◽  
The Sea Of Okhotsk ◽  
Kelp Species ◽  
Alaria Esculenta

Western Kamchatka is still poorly studied in floristic and fishing aspects and there is no accurate understand-ing on the boundaries of different kelp species distribution in the area. During the 2020 field study in the coastal area located from Cape Ambon to the mouth of Utholok river, including the area proximate to Ptichiy Island, we found 5 kelp species, including Phyllariella ochotensis, Pseudolessonia laminarioides, Laminaria inclinatorhiza, Saccharina latissima, and Alaria esculenta sensu lato. The first 3 species are endemic to the mainland coast of the Sea of Okhotsk. A special search off the coast of southwestern Kamchatka for another Okhotsk endemic species, Laminaria appressirhiza, showed that it was absent. A representative of the Ber-ing Sea kelp flora Hedophyllum bongardianum does not occur on western Kamchatka north of 51°N. The morphometric characteristics of plants belonging to different age groups and morphological features typical for Western Kamchatka’s populations of these species are discussed. Additionally, the molecular phylogeny of L. appressirhiza and H. bongardianum collected from the Sea of Okhotsk are discussed. As shown, the first species belongs to the genus Laminaria. From a commercial point of view, this coastal area was estimated as unpromising for the organization of kelp collection by a traditional manual method.

Contribution to the flora of marine algae of the coastal zone of the northeastern part of the Sea of Okhotsk

2018 ◽  
Vol 52 (1) ◽  
pp. 63-73
Author(s):  
N. V. Evseeva
Keyword(s):  
Coastal Zone ◽  
Sea Of Okhotsk ◽  
Marine Algae ◽  
Herbarium Material ◽  
Northeastern Part ◽  
The Sea Of Okhotsk ◽  
The Family ◽  
First Time

The revision of the herbarium material, collected in the northern part of the Sea of Okhotsk in 1965–1966 and stored in VNIRO, allowed to expand the taxonomic list of macrophyte algae of the coastal zone of this area. The locations of discovery of 24 previously unmentioned species are described. Myrionema balticum, Ulvella repens, Syncoryne reinkei, Acrochaetium arcuatum were found in the Sea of Okhotsk for the first time. Most species new for the Sea of Okhotsk is represented by epiphytes of the family Ulvellaceae (Chlorophyta). The final taxonomic list of this region, including literature data, consists of 169 species.

CARBONATE DISSOLUTION AND ULTRASTRUCTURAL BREAKDOWN IN PLANKTONIC FORAMINIFERA IN THE SEA OF OKHOTSK

2017 ◽  
Author(s):  
Alexandra Romanova ◽  
Alexandra Romanova ◽  
Vladimir Anin ◽  
Vladimir Anin ◽  
Sergey Pletnev ◽  
...  
Keyword(s):  
Sea Of Okhotsk ◽  
Planktonic Foraminifera ◽  
Carbonate Dissolution ◽  
Calcite Dissolution ◽  
The Sea Of Okhotsk ◽  
Globigerina Bulloides ◽  
Neogloboquadrina Pachyderma ◽  
Thin Walled ◽  
Shell Fragments ◽  
Degree Of Fragmentation

80 sediment stations collected along the meridian transect across the Sea of Okhotsk were studied in order to reveal patterns of dissolution based on planktonic foraminifera. The degree of calcite dissolution intensity from planktonic foraminifera determined by different indices (degree of fragmentation, presence of susceptible to dissolution species, benthos/ plankton ratio). The highest degree of dissolution evidenced by a large number of shell fragments and corroding walls were found in sediments from the area of the Kuril Islands. The most revealing measure of probable dissolution of foraminiferal shells in the central part of the sea is a low number and lack of thin-walled species. The effects of dissolution on foraminiferal shells were studied for dominated species Neogloboquadrina pachyderma sin and Globigerina bulloides using a scanning electron microscope. The results are important for understanding processes of sedimentation, the paleo-oceanologial reconstructions and for obtaining reliable results in isotope analyzes.

Decapodid stage of Neocrangon communis (Decapoda, Crangonidae) from the eastern part of the Sea of Okhotsk

2016 ◽  
Vol 25 (1) ◽  
pp. 13-22
Author(s):  
N.A. Sedova ◽  
S.S. Grigoriev
Keyword(s):  
Sea Of Okhotsk ◽  
General View ◽  
Characteristic Shape ◽  
The Sea Of Okhotsk ◽  
First Time ◽  
Distinguishing Features

For the first time the morphology of the decapodid stage of Neocrangon communis is described in detail. The decapodid can be distinguished from those of the genera Argis, Crangon, and Mesocrangon by the morphology of their telson, antennae, antennulae, and carapace. The main distinguishing features of the decapodid of N. communis were two spines on medial line of the carapace, a short rostrum, relatively wide scaphocerite, characteristic shape and length of the terminal setae on the telson. Drawings of general view and some limbs are presented.

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