The parasitic crustaceans of fishes from the Brazilian Amazon. 11. Vaigamidae fam. nov. (Copepoda: Poecilostomatoida) with males and females of Vaigamus retrobarbatus gen. et sp. nov. and V. spinicephalus sp. nov. from plankton

1984 ◽  
Vol 62 (4) ◽  
pp. 716-729 ◽  
Author(s):  
Vernon E. Thatcher ◽  
Barbara A. Robertson
Keyword(s):  
New Genus ◽  
Narrow Band ◽  
Antennal Segment ◽  
Brazilian Amazon ◽  
Thoracic Segment ◽  
The Other ◽  
The Third ◽  
Genital Segment ◽  
Pigment Distribution ◽  
Males And Females

Vaigamus retrobarbatus gen. et sp. nov. and V. spinicephalus sp. nov. (Copepoda: Poecilostomatoida) are described. The specimens were obtained by examining plankton samples from floodplain lakes of the Amazon River Basin in Brazil. The new genus is distinguished from all other genera and families in the suborder by the presence of retrostylets projecting laterally from the first thoracic segment and a long tapering rostral spine between the bases of the antennae. Vaigamidae fam. nov. is proposed for these forms. The two new species of the new genus are distinguished on the basis of the following characters. Size: retrobarbatus is larger than spinicephalus. Cephalothorax: that of spinicephalus is more ovoid. Pigment distribution: retrobarbatus had a broad transverse band of color on the cephalothorax while spinicephalus has a narrow band on the fourth thoracic segment. Rostral spine: spinicephalus has a spine with a subbasal swelling while that of the other species is smoothly tapering. Genital segment: that of retrobarbatus is more hexagonal. Antennal claw: in retrobarbatus the claw is longer than the third antennal segment while in the other species it is shorter. Leg 4: retrobarbatus has one fewer segment in each ramus than has the other species. Leg 6: that of retrobarbatus is longer.

scholarly journals THE PARASITIC CRUSTACEANS OF FISHES FROM THE BRAZILIAN AMAZON. 5. BRASERGASILUS GEN. NOV. (COPEPODA: CYCLOPIDEA), A "THREE-LEGGED" ERGASILID, WITH TWO NEW SPECIES AND THE PROPOSAL OF ABERGASILINAE SUBFAM. NOV.

1983 ◽  
Vol 13 (1) ◽  
pp. 195-214 ◽  
Author(s):  
Vernon E. Thatcher ◽  
◽  
Walter A. Boeger
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genus ◽  
Antennal Segment ◽  
Brazilian Amazon ◽  
The Other ◽  
Host Fish ◽  
The Family ◽  
Two New Species ◽  
Gill Parasites

ABSTRACT Brasergasilus jaraquensis gen. et sp. nov. and B. anodus sp. nov. (Copepoda: Cyclopidea: Ergasilidae), gill parasites of Semaprochiiodus insignis (Schomburgk) and Anodus elongatus Spix, are described from the Amazon River. The new genus has only three pairs of swimming legs and in this respect is similar only to one species from New Zealand, Abergasilus amplexus Hewitt, 1978. The two genera also have in common a three-segmented prehensile antenna. Abergasilus, however, has the base of the second antennal segment developed into a massive spine which abutts against the claw-like third segment. The new genus completely lacks this fundamental structure. Aditionally, Abergasilus has six free thoracic segments while the new genus only has five. Abergasilinae Subfam. nov. is proposed for these two genera and their three species. Ergasilinae nom. nov. is provisionally defined and proposed to include the other 11 genera of the family. The type species of Brasergasilus gen. nov. is B. jaraquensis sp. nov. and it can be distinguished from B. anodus sp. nov. by the following characteristics: 1) The type species is larger and of a greenish coloration while B. anodus has fewer pigment granules that are of a bluish tint. 2) B. jaraquensis has a more slender second antenna and the most abrupt bend of the claw occurs distally; the second antenna of B. anodus is thicker and the abrupt bend Is found proximally. 3) The uropod of the type species has two setae and two small spines, while that of the other species has three setae and lacks spines. 4) The first leg of B. jaraquensis is laterally serrate while that of B. anodus is pectinate. The two species parasitize two different genera of host fish and are probably host specific.

scholarly journals Miracetyma etimaruya gen. et sp. n. (COPEPODA, POECILOSTOMATOIDA, ERGASILIDAE) FROM FRESHWATER FISHES OF THE BRAZILIAN AMAZON

1993 ◽  
Vol 23 (1) ◽  
pp. 49-57 ◽  
Author(s):  
José Celso O. MALTA
Keyword(s):  
New Genus ◽  
Gill Filament ◽  
Brazilian Amazon ◽  
Freshwater Fishes ◽  
The Third ◽  
Leg Morphology ◽  
Swimming Capacity

Miracetyma etimaruyagen. et sp. n. is proposed from the gills filaments of Curimata cyprinoides(Linnaeus, 1758), Potamorhina latior(Spix, 1829) and Psectrogaster essequibensis(Gunther, 1864). The species of the new genus is characterized by having a more complex latching antenna. The claw is greatly reduced and has a groove; the third segment has one or two grooves; the first, second and third segments have one or two cuticular extensions. The legs have pectinate setae and the first endopod is greatly modified, very long, and without setae. The first segment of the first endopod is large, strong and elongate and the second segment is subcylindrical, slender and elongate. These modifications imply in a loss of swimming capacity which is linked to secure fixation on the gill filament. As a result, the leg morphology has evolved other functions.

Sexual Discrimination in the Siamese Fighting Fish (Betta Splendens Regan)

Behaviour ◽  
1975 ◽  
Vol 54 (1-2) ◽  
pp. 1-25 ◽  
Author(s):  
Peter F. Sale ◽  
C.M. Robertson
Keyword(s):  
Principal Component ◽  
Betta Splendens ◽  
The Other ◽  
Single Linkage ◽  
Male And Female ◽  
Sexual Discrimination ◽  
The Third ◽  
Live Fish ◽  
Males And Females ◽  
Agonistic Display

AbstractI. We recorded the responses of male Betta splendens when presented with various stimuli behind a transparent partition. The stimuli comprised i) live male and female B. splendens; ii) lifelike (motionless) models of male and female B. splendens; and iii) six stylised model B. splendens. The stylised models consisted of three pairs, one member of which had long male-like fins and raised opercula, and the other with short female-like fins and lowered opercula. The first pair had "aggressive", the second, "submissive", and the third, "reproductive" colouration. 2. The use of two techniques for comparing responses to the different stimuli was compared. Principal component analysis of unscaled data produced more satisfactory results than did clustering by single linkage on the basis of taxonomic distances calculated on scaled data. 3. The response by a male to a stimulus consisted of two categories of behaviour: "agonistic" display and nest-oriented activities. 4. The responses towards live males and females differed only in the relative amounts of "agonistic" and nest-oriented behaviour performed to each. A greater amount of "agonistic" behaviour was performed towards males. 5. Three main influences were found affecting a male's response to a conspecific: i) a tendency to perform all components of "agonistic" display and to inhibit performance of nest-oriented behaviour; ii) and iii) tendencies to perform particular components of the "agonistic" display. Thus the "agonistic" display was found to be complex and governed by at least three separate motivations. 6. The first influence varied according to the (perceived) sex of the stimulus, being great when the stimulus was a male, and slight when it was a female. The other two influences were independent of the nature of the stimulus. 7. Responses to lifelike, motionless models were very similar to those to live fish. 8. All male models and the "aggressive" female model were treated similarly to the live male. The other models were treated similarly to the live female. 9. A mechanism for sexual discrimination was proposed, in which a male is characterised by long fins and/or raised opercula, or, an unpatterned body. A female is characterised by short fins and a patterned body. Discrimination can be accomplished solely by use of visual stimuli.

scholarly journals Effect of Adding Broccoli Leaves (Brassica oleracea L.) Extract to Drinking Water on Eggs Production and Intestinal Microflora of Japanese Quail Coturnix japonica Temmink & Schlegel, 1849

2020 ◽  
Vol 33 (2) ◽  
pp. 42-51
Author(s):  
Duha S.A. Al-Ashoor ◽  
Khalid C.K. Al-Salhie
Keyword(s):  
Drinking Water ◽  
Intestinal Microflora ◽  
The Other ◽  
Feed Consumption ◽  
Alcoholic Extract ◽  
Feed Conversion ◽  
E Coli ◽  
The Third ◽  
Japanese Quails ◽  
Males And Females

This study was carried out to determine the effects of adding broccoli leaves extract to drinking water on eggs production and intestinal microflora (total bacteria, lactobacilli and Escherichia coli) of breeder Japanese quails. One hundred and thirty-two 45 days-old of Japanese quails (males and females) were randomly distributed into four groups. Each group has three replicates. The groups were included: The first group was kept without any addition as the control. The extraction of broccoli leaves as 100, 200 and 300 mg. l-.1 were added to bird's drinking water of the second, third and fourth groups respectively. The results showed a significant improvement in eggs production (HD %), accumulative eggs per 30 days and eggs mass in the third and fourth groups compared to the other groups. While, no significant differences were shown in the feed consumption, feed conversion ratio and eggs weight among groups. Caecal and duodenum E. coli showed a significant decrease in third and fourth groups compared to the others. However, duodenum lactobacilli increased significantly in the fourth group compared to other groups. It was also showed no significant differences in the total duodenum bacteria among studied groups. While, the total caecal bacteria decrease significantly in the third group compared to other groups. Based on the presented results can be concluded that alcoholic extract of broccoli leaves at levels 200 and 300 mg. l-1 could enhance productive characteristics (eggs production HD %, accumulative eggs per 30 days and eggs mass). On the other hand, it increased duodenum lactobacilli and decreased caecal and duodenal E. coli  population of breeder Japanese quails.

Distribution and abundance of the pelagic processid, Processa pippinae Wicksten & Méndez, 1985 (Decapoda, Caridea, Processidae), collected during the TALUD XIV cruise in the Gulf of California, Mexico, and description of a new genus

Crustaceana ◽  
2012 ◽  
Vol 85 (4-5) ◽  
pp. 463-472 ◽  
Author(s):  
Michel E. Hendrickx
Keyword(s):  
Posterior Margin ◽  
Gulf Of California ◽  
New Genus ◽  
Morphological Characteristics ◽  
The Other ◽  
Dorsal Margin ◽  
Posterior Lobe ◽  
Additional Material ◽  
Abdominal Somite ◽  
The Third

The pelagic processid, Processa pippinae Wicksten & Méndez, 1985, has been reported previously as an endemic species in the northern Gulf of California, Mexico. Additional material collected accidentally in a benthic sledge and with a mid-water micronecton net is reported, including a series of small-sized specimens (CL 2.2 mm). The shape of the laterally compressed rostrum of this species varies considerably with size and among adult specimens. Based on several morphological characteristics of P. pippinae, a new genus, Maryprocessa, is proposed. Several unique characteristics separate Maryprocessa new genus from the other five genera of Processidae, including the laterally compressed rostrum overreaching the cornea, unique among the Processidae, the extraordinary long antennal and antennular flagella, the posterior lobe on the dorsal margin of the third abdominal somite, and the long, acute pair of spines on the posterior margin of the sixth abdominal somite.

scholarly journals Stretch Receptor Organs in Squilla Mantis Latr. (Crustacea: Stomatopoda)

1964 ◽  
Vol 41 (4) ◽  
pp. 793-804 ◽  
Author(s):  
R. L. C. PILGRIM
Keyword(s):  
Single Cell ◽  
Stretch Receptor ◽  
Thoracic Segment ◽  
The Other ◽  
Sensory Cells ◽  
The Third ◽  
Amino Butyric Acid ◽  
Single Receptor ◽  
Abdominal Organs ◽  
Receptor Muscle

1. Structures which have been described as muscle receptor organs were found to respond to experimentally applied stretch. The presence of both slowly-adapting and fast-adapting receptors was determined in those organs where two sensory cells and two receptor muscles have been described, i.e. in the abdomen and posterior four thoracic segments. 2. In the fourth thoracic segment, with two cells on a single receptor muscle, one organ is slowly-adapting and the other fast-adapting, with properties not distinguishable from those where separate receptor muscles are present. 3. In the third thoracic segment, with a single cell and receptor muscle, the organ is slowly-adapting. 4. In the second thoracic segment a slowly-adapting cell was discovered. It is without a receptor muscle or accessory innervation and resembles an N-cell of the Decapoda. 5. The reactions of the abdominal organs to acetylcholine and to γ-amino butyric acid are qualitatively similar to those in Decapoda. 6. The series of stretch-sensitive organs in Squilla and in Decapoda are compared.

Canga renatae, a new genus and species of Cyphophthalmi from Brazilian Amazon caves (Opiliones: Neogoveidae)

Zootaxa ◽  
2010 ◽  
Vol 2508 (1) ◽  
pp. 45 ◽  
Author(s):  
MARCIO BERNARDINO DASILVA ◽  
RICARDO PINTO-DA-ROCHA ◽  
GONZALO GIRIBET
Keyword(s):  
North American ◽  
New Genus ◽  
Brazilian Amazon ◽  
The Other ◽  
Amazon Forest ◽  
South American ◽  
New Genus And Species ◽  
The North ◽  
Unique Character ◽  
The Family

A new genus and species of Cyphophthalmi, Canga renatae gen. nov., sp. nov., is described in the family Neogoveidae from a system of caves in the Serra de Carajás, Pará State, Brazil. Canga can be easily distinguished from other neogoveid genera by the presence of a dentate claw on leg I, a unique character among known cyphophthalmid species, and by the free coxa II, which is fused to coxae III and IV in all the other neogoveid species except for the North American Metasiro. The new genus also differs from other Neotropical neogoveids in the lack of a dorsal crest on the chelicerae and in the lack of opisthosomal glands. The finding of a neogoveid in the Pará State greatly increases the known distribution of South American cyphophtalmids into the Eastern Brazilian Amazon forest.

A new genus of giant lacewing (Insecta, Neuroptera, Ithonidae) from the Middle Jurassic of China

Zootaxa ◽  
2019 ◽  
Vol 4613 (2) ◽  
pp. 375
Author(s):  
QIANG YANG ◽  
CHAOFAN SHI ◽  
HONG PANG ◽  
DONG REN
Keyword(s):  
Middle Jurassic ◽  
Inner Mongolia ◽  
New Genus ◽  
Hind Wing ◽  
Color Pattern ◽  
The Other ◽  
Morphological Similarity ◽  
New Genus And Species ◽  
Wing Membrane ◽  
The Third

A new genus and species of Ithonidae, Puripolystoechotes pumilus gen. et sp. nov., is described from the Middle Jurassic of Inner Mongolia, China. The new genus is distinguished by possessing a hind wing with a simple humeral vein, only three ra-rp crossveins, M forked slightly distal to origin of RP1, and wing membrane without color pattern. This is the third ithonid genus from this locality, showing interesting morphological similarity with the other ithonids from the same locality and period. 

Five new species of Axiidae (Crustacea: Decapoda: Axiidea) from deep-water off Taiwan, with description of a new genus

Zootaxa ◽  
2010 ◽  
Vol 2352 (1) ◽  
pp. 1 ◽  
Author(s):  
TOMOYUKI KOMAI ◽  
FENG-JIAU LIN ◽  
TIN-YAM CHAN
Keyword(s):  
New Species ◽  
Deep Water ◽  
New Genus ◽  
The Other ◽  
The Third ◽  
Number Of Species ◽  
Deep Waters

One new genus and five new species of axiid burrowing shrimps are described from deep-waters around Taiwan: Formosaxius dorsum n. gen., n. sp.; Ambiaxius propinquus n. sp., Calastacus formosus n. sp.; Eiconaxius rubrirostris n. sp. and E. kensleyi n. sp. The new genus, Formosaxius, appears closest to Bouvieraxius Sakai & de Saint Laurent, 1989 in the arrangement and armature of the gastric carinae on the carapace and the possession of pleurobranchs, but the presence of appendices internae on the third to fifth pleopods readily separates the new genus from Bouvieraxius. Affinities of the other four new species are also discussed. This study raises the number of species of Axiidae known from Taiwan to 13.

Alophia graniticola (Tigridieae, Iridaceae): A New Species from the Brazilian Amazon

2021 ◽  
Vol 46 (2) ◽  
pp. 296-303
Author(s):  
André dos Santos Bragança Gil ◽  
Layla Jamylle Costa Schneider ◽  
Climbiê Ferreira Hall
Keyword(s):  
New Species ◽  
Native Species ◽  
Brazilian Amazon ◽  
The Other ◽  
Deciduous Forests ◽  
Mountain Range ◽  
The Third ◽  
Granite Outcrops ◽  
Northern Brazil ◽  
A New Species

Abstract— A new species of Alophia (Tigridieae, Iridaceae), only known from the Brazilian Amazon, is here described and illustrated. Alophia graniticola was found growing over granite outcrops in the Serra dos Carajás mountain range, Pará state, Northern Brazil, inside or at the edges of dry deciduous forests. This is the third native species of Alophia registered in Brazil, differing from the other species of the genus by the anthers with an incurved apex, an unprecedented feature in the genus. An identification key for all Alophia species is also provided.

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