NOTES ON THE LARVA OF OPHIUSA BISTRIARIS, Hübner

1870 ◽  
Vol 2 (9) ◽  
pp. 130-130
Author(s):  
W. Saunders
Keyword(s):  
Entire Length ◽  
Black Stripe ◽  
Silver Maple ◽  
Line Widening

Late in July a number of specimens of a larva apparently allied to the genus Catocala were taken from the silver maple(Acer dasycarpum, Ehrn.) The description of this larva is as follows :Length 1.40 inches; somewhat onisciform.Head medium sized, flattened, bilobed; color pale ashen grey, with streaks of pale brown appearing under a magnifying lens as a fine network ; a dark brown, nearly black, stripe on each side, and a few short grey hairs scattered over its surface.Body above brownish-grey, with numerous streaks and dots of pale brown. A double irregular dorsal line, widening here and there throughout its entire length. There are many other broken lines of the same character, composed chiefly of dots, but none of them continuous

A new species of Megarhyssa Ashmead (Hymenoptera: Ichneumonidae: Rhyssinae) from tropical Mexico with a key to Mexican species

Zootaxa ◽  
2013 ◽  
Vol 3619 (2) ◽  
pp. 195-200 ◽  
Author(s):  
A. I. KHALAIM ◽  
E. RUÍZ-CANCINO
Keyword(s):  
New Species ◽  
North American ◽  
New World ◽  
Entire Length ◽  
Colour Pattern ◽  
Black Stripe ◽  
Mexican Species ◽  
A New Species

A new species of ichneumon wasp, Megarhyssa gratiosa sp. nov., is described from Chiapas province in the tropical part of Mexico. This is a southern most record of the genus in the New World. The new species is one of the largest and most spectacular ichneumonid species in the Mexican fauna. Megarhyssa gratiosa sp. nov. differs from its North American congeners primarily by the conspicuous colour pattern of the metasoma which is yellow with broad dorsal black stripe extending along its entire length, and the longer ovipositor. A key to three Mexican species of Megarhyssa is also provided.

A generic method of design of on-site stormwater detention storages

1995 ◽  
Vol 32 (1) ◽  
pp. 93-99 ◽  
Author(s):  
Donald Ian Phillips
Keyword(s):  
Design Theory ◽  
Drainage System ◽  
Entire Length ◽  
Community Assets ◽  
Drainage Design ◽  
Urban Consolidation ◽  
Universal Application ◽  
Method Of Design

On-site stormwater detention is widely used in Australia as a means of controlling the increased storm discharges from urban consolidation projects. However, unless the maximum permissible site discharge is correctly determined, the local piped drainage system may be overloaded. This paper presents a generic methodology that integrates detention storage behaviour with drainage design theory in such a manner as to protect the entire length of the downstream drainage system. Its generic nature facilitates its universal application to all systems, protecting these valuable community assets throughout their service lives.

scholarly journals Redescription of Astyanax goyacensis Eigenmann, 1908 (Ostariophysi: Characiformes: Characidae)

2009 ◽  
Vol 7 (3) ◽  
pp. 371-376 ◽  
Author(s):  
Valdener Garutti ◽  
Francisco Langeani
Keyword(s):  
Lateral Line ◽  
Species Complex ◽  
Color Pattern ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Black Stripe ◽  
Conspicuous Feature ◽  
Fin Rays ◽  
Shape Pattern ◽  
Eye Diameter

Astyanax goyacensis Eigenmann, 1908 is redescribed based on the holotype and 25 topotypes. The species belongs to the A. bimaculatus species complex, sharing with those species a black, horizontally ovate, humeral spot (the most conspicuous feature of this complex), two diffuse vertical brown bars in the humeral area (the first through humeral spot and the second 2-3 scales behind), and black medium caudal-fin rays. Furthermore, A. goyacensis possesses a black stripe extending along midlateral body portion, more conspicuous in alcohol preserved specimens. These characteristics allow its inclusion in the putative "black lateral stripe" sub-group of A. bimaculatus species complex. From the species of this complex it differs by the black lateral stripe shape, pattern of chromatophores on the flank, coloration of the caudal fin, scales on the lateral line, branched rays on anal fin, eye diameter, and caudal peduncle depth. Comments about the color pattern in Astyanax bimaculatus species complex are added.

Actinomycetes in discolored wood of living silver maple

1981 ◽  
Vol 59 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Robert A. Blanchette ◽  
John B. Sutherland ◽  
Don L. Crawford
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Carbon Source ◽  
Cell Walls ◽  
Hydroxybenzoic Acid ◽  
Liquid Media ◽  
Streptomyces Strain ◽  
Culture Techniques ◽  
Silver Maple ◽  
Scanning Electron

The greenish-brown margin of discolored wood in three living silver maple trees, Acer saccharinum L., was examined by scanning electron microscopy and microbiological culture techniques. Micrographs of xylem vessels revealed filamentous structures; some of them appeared to be actinomycetous hyphae. Actinomycetes identified as Streptomyces parvullus Waksman & Gregory, S. sparsogenes Owen, Dietz & Camiener, and a third Streptomyces strain were isolated repeatedly from discolored wood of each tree. These isolates grew in liquid media in the presence of 0.1% (w/v) concentrations of several phenols. Although other phenols included in the test were not substantially degraded, p-hydroxybenzoic acid was utilized as a carbon source by S. parvullus. All three actinomycetes inhibited growth of selected wood-inhabiting fungi when paired on malt agar. When inoculated on sterilized sapwood and discolored wood from silver maple, the actinomycetes colonized vessel walls and occlusions, but were not observed to decay cell walls.

First record of a bicephalic chondrichthyan found in Australian waters; the southern fiddler ray, Trygonorrhina dumerilii (Chondrichthyes: Rhinobatidae)

2014 ◽  
Vol 65 (5) ◽  
pp. 396 ◽  
Author(s):  
Leonardo Guida ◽  
Terence I. Walker ◽  
Richard D. Reina
Keyword(s):  
Magnetic Resonance ◽  
First Record ◽  
Environmental Stressors ◽  
Entire Length ◽  
Documented Case ◽  
Normal Neonates

We report the first documented case of bicephaly in a chondrichthyan, the southern fiddler ray, Trygonorrhina dumerilii, in Australian waters. Females in the latter stages of pregnancy, as confirmed by ultrasound, were captured by hand in Swan Bay, Victoria (38.252°S, 144.616°E) in February 2013 and transported to aquaria. Up to 10 females gave birth in aquaria in early April 2013 to 11 neonates, one of which was a still-born, bicephalic neonate. Magnetic resonance imagery of the bicephalic neonate displayed the presence of two parallel vertebral columns running the entire length of the animal, diverging into two well formed heads. Morphological measurements were also made, comparing the bicephalic neonate to normal neonates. The cause of bicephaly is unknown, although congenital and environmental stressors during development may cause this condition.

TACHYTRECHUS STUDIES (DOLICHOPODIDAE, DIPTERA)

1940 ◽  
Vol 72 (6) ◽  
pp. 111-115 ◽  
Author(s):  
F. C. Harmston ◽  
G. F. Knowlton
Keyword(s):  
Outer Edge ◽  
Black Hair ◽  
White Spot ◽  
Black Stripe ◽  
Apical Half

Male. Length 6.5 mm.; of wing 4.8 mm. Face narrow immediately below antennae, thickly covered with bright golden pollen; proboscis black; palpi dark brown bearing fine black hair and lightly dusted with yellowish pollen; antennae yellow; first joint large with a black stripe along upper outer edge and covered with short, stiff black hairs, second joint small, yellow, third joint small, decumbent, black on apical half; arista black, about one and one-half times length of face, lamella (fig. 4) at tip with an elliptical white spot on upper side near base; front black with bluish reflections, especially along the orbits; ocellar bristles black, hair near proboscis whitish.

The fourth coast, revisited

2021 ◽  
pp. 205301962110446
Author(s):  
John Kim
Keyword(s):  
Mississippi River ◽  
Entire Length ◽  
Anthropogenic Structures

The author traveled for 2.5 months by canoe and other modes of transport down the entire length of the Mississippi River with the Mississippi. An Anthropocene River project. Reflecting on this journey, this essay revisits Catherine Brown and William Morrish’s 1991 essay, The Fourth Coast: An Expedition on the Mississippi River, in which Brown and Morrish document their research efforts to identify coherent anthropogenic structures and systems that could warrant the characterization of the Mississippi River as a Fourth Coast. To encourage a flourishing of overlapping multispecies life, the essay moves beyond their spatial reimagining by defining the “distributed nature of home” as a model for conceptualizing distributed spatialities and plural temporalities along the Mississippi River.

1. Observations on the Anatomy of the Rorqual (a Whalebone Whale of the largest magnitude), drawn up from the dissection of a specimen found dead off North Berwick

1845 ◽  
Vol 1 ◽  
pp. 14-15 ◽  
Author(s):  
Robert Knox
Keyword(s):  
Middle Part ◽  
Anatomical Structure ◽  
Entire Length ◽  
Straight Line ◽  
The Brain

This paper, composed ehiefly of anatomical details regarding the anatomical structure of the Rorqual, scarcely admits of abridgement. The author has described the skeleton of the cavity for receiving the brain and the mechanism of the larynx at greatest length. The entire length of the whale, measured by a straight line, drawn on the sand from the nose to the middle part of the tail, and making a slight allowance for the curved position in which the animal lay, was 80 feet. Length of the head 23 feet. The girth of the carcass at the pectoral extremities (though the animal had been ten days on the beach, and was much collapsed) 34 feet. Breadth of the tail from tip to tip' 20 feet. The author describes the appearance of the mouth, lined with whalebone, as very surprising.

XIX. On the structure and development of myriothela

1875 ◽  
Vol 165 ◽  
pp. 549-575 ◽  
Keyword(s):  
Single Species ◽  
The Body ◽  
Entire Length ◽  
Species Being

Mykiothela, of which we have as yet no satisfactory evidence of more than a single species being known, consists of a solitary attached hydranth, carrying near its proximal or attached end the blastostyles or appendages which give origin and support to the gonophores (Plate 55). Full-sized specimens (fig. 1) measure, when extended, nearly 2 inches in length. They are then cylindrical in form, with the mouth occupying the summit of a short conical hypostome, behind which the tentacles commence, and thence extend over somewhat more than one half the entire length of the body; while the proximal end of the body is bent at right angles to the rest, is invested with a chitinous perisarc, and gives origin to short sucker-like processes of attachment.

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