Discovery of the female of Cymbasoma rochai Suárez-Morales & Dias, 2001 (Copepoda, Monstrilloida, Monstrillidae), the first Brazilian member of the C. longispinosum species-group

Crustaceana ◽  
2020 ◽  
Vol 93 (9-10) ◽  
pp. 1091-1101
Author(s):  
E. Suárez-Morales ◽  
Cristina O. Dias ◽  
Sérgio L. Bonecker

Abstract Monstrilloid copepods are protelean parasites of marine benthic invertebrates; their juvenile stages are entirely endoparasitic and emerge from the host as free-living reproductive adult individuals that become part of the plankton. Linking both sexes of a monstrillid species is difficult because individuals of both sexes and members of different species can be collected together as planktonic adults. The Brazilian species Cymbasoma rochai Suárez-Morales & Dias, 2001, known from male specimens only, was recognized to have a strong resemblance to the nominal C. longispinosum, currently recognized as a well-defined species-group (Suárez-Morales, 2011). Hence, it was expectable that the female C. rochai would also resemble the species of the C. longispinosum species-group. Plankton surveys in Brazilian coastal areas yielded records of several female individuals reported as Cymbasoma cf. longispinosum. It is presumed that these are the females of C. rochai. The hitherto unknown female of C. rochai is herein described as such, and in addition revealed and described as a member of the widespread C. longispinosum species-group, now containing 11 species worldwide. This is the first confirmed record of a member of this group from Brazil and also the first known male of this species-group.

Ecology ◽  
2013 ◽  
Vol 94 (1) ◽  
pp. 250-256 ◽  
Author(s):  
Colin B. A. Macfarlane ◽  
David Drolet ◽  
Myriam A. Barbeau ◽  
Diana J. Hamilton ◽  
Jeff Ollerhead

Author(s):  
M. F. Dyer

The distribution patterns of many marine benthic invertebrates are not well known, and when records exist they are usually in the form of presence and absence data with little or no information on the relative density of populations from area to area.


Diversity ◽  
2018 ◽  
Vol 10 (3) ◽  
pp. 80 ◽  
Author(s):  
Angelina Lo Giudice ◽  
Carmen Rizzo

The ecological function of bacteria-invertebrate interactions in Polar areas remains poorly understood, despite increasing evidence that microbial metabolites may play pivotal roles in host-associated chemical defense and in shaping the symbiotic community structure. The metabolic and physiological changes that these organisms undergo in response to adapting to extreme conditions result in the production of structurally and functionally novel biologically active molecules. Deepening our knowledge on the interactions between bacteria and their invertebrate host would be highly helpful in providing the rationale for why (e.g., competition or cooperative purpose) and which (whether secondary metabolites, enzymes, or proteins) bioactive compounds are produced. To date, cold-adapted bacteria associated with marine invertebrates from the Arctic and Antarctica have not been given the attention they deserve and the versatility of their natural products remains virtually unexplored, even if they could represent a new attractive frontier in the search for novel natural compounds. This review is aimed at showcasing the diversity of cold-adapted bacteria associated with benthic invertebrates from Polar marine areas, highlighting the yet unexplored treasure they represent for biodiscovery.


Phytotaxa ◽  
2016 ◽  
Vol 257 (2) ◽  
pp. 122
Author(s):  
Leidiana Lima Santos ◽  
Margareth Ferreira Sales ◽  
Marcos Sobral

Myrcia arenaria, a new species of Myrcia sensu lato, is described, illustrated and compared with related species. The species is recognized by a combination of characters, which include elliptic to oval foliar blades, flower buds tearing at anthesis into 3 irregular lobes or 5 regular lobes; lobes  obovate, apiculate, sericeous at the base and flowers without petals. This taxon seems to be restricted to the coastal areas of northeastern Brazil, growing in the restingas located in the states of Alagoas, Bahia, Pernambuco, and Sergipe. Additionally, we also proposed the synonymization of Marlierea leal-costae with Psidium amplexicaule. We also present a map showing the geographical distribution of the species.


Nematology ◽  
2002 ◽  
Vol 4 (8) ◽  
pp. 883-889
Author(s):  
Brian Boag ◽  
Gregor Yeates

AbstractTo investigate changes in body size of Longidoridae during growth, we used published dimensions of stages to calculate volumes of the juvenile and adult stages of 33 species. A consistent increase in body volume between the juvenile stages was found with proportionally more growth occurring between the smaller stages. In species where three, rather than four, juvenile stages are present, the ultimate size of adults was correspondingly smaller. In the Heteroderidae, greatest growth occurs in later stages and this indicates different adaptations to plant parasitism. Analysis of further groups of free-living and parasitic nematodes is required to increase understanding of body growth and life histories, both within and between families.


Author(s):  
V. Lo Russo ◽  
G. Villares ◽  
A. Martelli ◽  
C.T. Pastor de Ward ◽  
C. Harguinteguy

Two new free-living marine nematodes belonging to the family Thoracostomopsidae, subfamily Enoplolaiminae and the generaEpacanthionare described from Patagonian coastal areas, Río Negro and Chubut provinces of Argentina. InEpacanthion bicuspidatumsp. nov. the main features are: two cusps on distal mandible end; presence of two rings of eight setae in the cervical region; and eight crown-shaped setae along the body, presence of one supplement distant two cloacal body diameter (cbd) from cloacae, gubernaculum and short spicule.Epacanthion ampullatumsp. nov. is characterized by having a tubular and long pre-cloacal supplement, short spicule, presence of gubernaculum, presence of three long setae on the tip of the tail, the presence of one supplement distant three cbd from cloacae and the presence of two small cusps on the distal end of the mandible.


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