Calanus marshallae, a new species of calanoid copepod closely allied to the sibling species C. finmarchicus and C. glacialis

1974 ◽  
Vol 26 (1) ◽  
pp. 77-99 ◽  
Author(s):  
B. W. Frost
Author(s):  
Mohsen M. El-Sherbiny ◽  
Hiroshi Ueda

A new species of calanoid copepod, Centropages aegypticus sp. nov. collected from the Egyptian coasts of the northern Red Sea is described. This species is unique in having two pointed conical processes on the dorsal surface of cephalosome in both sexes, female genital compound somite with irregular-surface outline of the right swelling part and transverse dorsolateral row of spinules on the left side, 2-segmented exopod of the female leg 5, asymmetrical medial processes of the female leg 5, of which the left one is longer and medially-curved and the right one with oblique row of thick spinules, and a club-shaped medial seta on the third exopodal segment of the male leg 5. The new species is similar to C. tenuiremis, but is not assigned to the same species group as the latter species or to any other groups.


1963 ◽  
Vol 41 (6) ◽  
pp. 971-989 ◽  
Author(s):  
Eric L. Mills

Ampelisca vadorum is described from eastern North American coastal waters. It has been confused since 1903 with the European Ampelsca spinipes Boeck, but differs considerably in morphology and ecology. A. spinipes is redescribed and figured. A deep-water record of A. spinipes from Cabot Strait refers to A. spinimana Chevreux. "Intersexes" in A. vadorum are really subadult males. Two generations per year occur north of Cape Hatteras. A small undescribed sibling species occurs in the same areas. Ten other western Atlantic Ampelisca species are discussed briefly, and a key is given to all species of the area.


1996 ◽  
Vol 74 (10) ◽  
pp. 1898-1906 ◽  
Author(s):  
Cheryl A. Jerome ◽  
Denis H. Lynn ◽  
Ellen M. Simon

Ciliates infected 0.25% of adult Aedes sp. mosquitoes collected in Guelph, Ontario. Morphological observations of live and stained specimens indicated that these ciliates belonged to the Tetrahymena pyriformis sibling species complex. This study provides the first well-documented case of insects being infected by a species in the T. pyriformis complex. Mating experiments demonstrated that these "mosquito" ciliates were reproductively isolated from previously described biological species in the complex, and are designated a new species, Tetrahymena empidokyrea n.sp. Phylogenetic analysis using SSrDNA sequences suggested that T. empidokyrea n.sp. is either basal to all species in the genus Tetrahymena or basal to one of the two main lineages in that genus.


2014 ◽  
Vol 171 (3) ◽  
pp. 507-533 ◽  
Author(s):  
Janet M. Bradford-Grieve ◽  
Geoffrey A. Boxshall ◽  
Leocadio Blanco-Bercial

1993 ◽  
Vol 23 (1) ◽  
pp. 95-105 ◽  
Author(s):  
Edinaldo Nelson dos SANTOS-SILVA ◽  
Barbara ROBERTSON

A new species of Calanoid copepod, Rhacodiaptomus besti,is described from material collected in the Igarapé São Pedro, Rio Jamari, State of Rondônia, and Lago Amanã, Rio Japurá, State of Amazonas, in Western Amazonia. A detailed morphological analysis of the species was undertaken in order to provide a basis for future studies on inter and intrageneric relationships.


2005 ◽  
Vol 13 (2) ◽  
pp. 233-238
Author(s):  
V.N. Tanasijtshuk

Two sibling species of Chamaemyiidae are considered: a new species, Leucopis decipiens sp. n. from the Nearctic, and L. annulipes Zetterstedt, 1848, widespread in the Palaearctic and the Nearctic.


Crustaceana ◽  
2013 ◽  
Vol 86 (10) ◽  
pp. 1250-1265
Author(s):  
Elena L. Markhaseva

A new calanoid copepod genus Frankferrarius is based on the female and male of a new species described herein. The specimens were collected in the North and South Atlantic from abyssal depths close to the sea bed during the German expedition DIVA III in 2009. Frankferrarius admirabilis gen. et sp. nov. is a representative of the superfamily Arietelloidea with the praecoxal arthrite of the maxillule heavily sclerotized and a highly specialized, huge maxilla with a well-pronounced articulation between the coxa and basis and with long, grouped endopod setae apparently designed for piercing and grasping prey. This new genus, Frankferrarius, does not completely fit any known family of the Arietelloidea, but is provisionally placed in the Augaptilidae as it shares with this family the general pattern of segmentation and setation of its swimming legs, and a single genital operculum positioned medially on the ventral part of the genital double-somite.


1985 ◽  
Vol 117 (12) ◽  
pp. 1489-1496 ◽  
Author(s):  
G.G. Grant ◽  
L. MacDonald ◽  
D. Frech ◽  
K. Hall ◽  
K.N. Slessor

AbstractField-screening tests using dodecenyl and dodecadienyl acetates and alcohols were conducted in pine plantations in northern Ontario to find attractants for Rhyacionia and Eucosma moths. Rhyacionia adana was attracted by various ratios of (E)-9-dodecenyl acetate and (E)-9-dodecen-1-ol (99:1 to 70:30) but no clear preference was observed. Similarly, R. busckana was also attracted to the same ratios of these compounds. Rhyacionia granti Miller, a new species revealed by these tests, was attracted to (E,E)-8.10-dodecadienyl acetate. Rhyacionia granti and R. busckana are newly recognized sibling species distinguished in this study by differences in their respective attractants, EAG responses, and phenologies. The fourth species studied. E. gloriola, was optimally attracted by 9:1 and 8:2 ratios of (Z)-9-dodecenyl acetate and (E)-9-dodecenyl acetate. Flight data for the 4 species in the same plantation revealed overlapping flight periods. Rhyacionia granti was the earliest flier, followed closely by R. adana and R. busckana, and somewhat later by E. gloriola.


2014 ◽  
Vol 171 (3) ◽  
pp. 507-533
Author(s):  
Janet M. Bradford-Grieve ◽  
Geoffrey A. Boxshall ◽  
Leocadio Blanco-Bercial

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