| Tomigerus clausus | |
|---|---|
 | |
| Drawing of a shell of Tomigerus clausus | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| (unranked): | clade Heterobranchia clade Euthyneura ContentsStylommatophora |
| Superfamily: | |
| Family: | |
| Genus: | |
| Species: | T. clausus |
| Binomial name | |
| Tomigerus clausus Spix, 1827 | |
Tomigerus clausus is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Odontostomidae.
This species occurs in Brazil.
The anatomy of Tomigerus clausus was examined by Harold Heath in 1914. [1]
The mantle has more highly thickened margins and more glandular epithelium than in the genus Anostoma , extending throughout the body whorl of the shell to the region adjacent to the aperture. It thus terminates at the point where the ureter bends abruptly upon itself. The external openings of the ureter and intestine occupy the usual positions on the right side, and from this point they pursue a course parallel to the external surface of the body, in close contact with the mantle cavity. The ureter bends sharply upon itself at the termination of the mantle cavity, and, dorsally placed with reference to this chamber, proceeds anteriorly to unite with the forward extremity of the kidney. The body of the kidney is a compact, sac-like body consisting, as usual, of highly folded glandular epithelium confined, in the posterior half of the organ, to the outer face. The pericardium is in contact with this glandular section throughout its entire length, but is scarcely more than half as extensive. A pericardial opening was not observed. It may be added that the kidney is placed dorsally with reference to the pericardium. [1]
There are no special features of the digestive system of Anostoma depressum. [1]
The reproductive system, considering that the gonad is in a highly quiescent state, is comparatively large and more compact than in Anostoma. The gonad consists of several slender diverticula, located in the apical whorls of the visceral mass. These contain primitive sex cells undifferentiated into sperm and ova. The hermaphroditic duct extends ventrally, close to the columella, and shortly before entering the accessory glands it attaches to a slender pear-shaped organ, possibly a seminal vesicle, consisting of upwards of ten small diverticula imbedded in a muscular sheath. These are empty and give no sign of glandular activity. The accessory glands are voluminous though inactive organs, though several lobes give them a much greater dorso-ventral thickness. The duct leading from the accessory glands becomes considerably widened near its proximal extremity, and possibly functions as a shell gland. As in Anostoma, the duct from the seminal receptacle springs from this point, and, as a slender canal, proceeds to the spacious sack situated in close proximity to the accessory glands. The vas deferens, likewise, unites with the penis some distance from its distal extremity, thus forming a flagellum. No penis retractor has been discovered in this region. On the other hand, several strands attaching to the penis sheath in the neighborhood of the outer opening may operate as retractors. [1]
A body cavity is any space or compartment, or potential space, in an animal body Cavities accommodate organs and other structures; cavities as potential spaces contain fluid.
Articles related to anatomy include:
The development of the urinary system begins during prenatal development, and relates to the development of the urogenital system – both the organs of the urinary system and the sex organs of the reproductive system. The development continues as a part of sexual differentiation.
The male reproductive system consists of a number of sex organs that play a role in the process of human reproduction. These organs are located on the outside of the body, and within the pelvis.
Harpa, common name the "harp snails", is a genus of large predatory sea snails, marine gastropod mollusks in the family Harpidae.
Paryphanta busbyi is a species of large predatory land snail, a terrestrial pulmonate gastropod mollusk in the family Rhytididae.
Beddomeia minima is a population of freshwater snails that are endemic to Australia. It is commonly classified as a hydrobiid snail. This population was listed as Vulnerable on the IUCN Red List in 2011 due to its distribution being restricted to a single location and range of possible threats present in Tasmania. Beddomeia minima is one of a few fresh water snail species belonging to the same genus Beddomeia that survive in Tasmania, Australia, specifically a single location in the Scottsdale area.
Beddomeia protuberata is a species of endemic freshwater snail in the family Tateidae, found in northern Tasmania, Australia. The shells look ovate and periostracum yellow with some pustules, length between 2.29 mm and 2.93 mm and width between 2.01 mm and 2.34 mm. Beddomeia protuberata has 1.75 protoconch whorls. Its image of microsculpture is uniform and its wrinkles arranged weakly and helically. The teleoconch of beddomeia protuberata has 2.2 to 2.7 convex whorls, and the ratio of convexity is 0.15 to 0.24. Sculptures of the teleoconch are vague with prosocline growth lines. The margin of the last whorl is evenly circular. The thickness and width of inner lips are medium sizes, and the columellar swelled up prominently. The outer lips of Beddomeia protuberata is prosocline, which means the shell leans forwards compared to the shell’s coiling axis. The width of their umbilicus is between 0.31 mm to 0.51 mm. The umbilicus of female beddomeia protuberata are wider than the umbilicus of male.
Edgbastonia coreena is a species of small freshwater snails which have an operculum, aquatic gastropod mollusks in the family Tateidae.
The development of the reproductive system is the part of embryonic growth that results in the sex organs and contributes to sexual differentiation. Due to its large overlap with development of the urinary system, the two systems are typically described together as the urogenital or genitourinary system.
Fiona pinnata, common name Fiona, is a species of small pelagic nudibranch, a marine gastropod mollusk in the superfamily Fionoidea. This nudibranch species lives worldwide on floating objects on seas, and feeds mainly on barnacles, specifically goose barnacles in the genus Lepas.
The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction. Many non-living substances such as fluids, hormones, and pheromones are also important accessories to the reproductive system. Unlike most organ systems, the sexes of differentiated species often have significant differences. These differences allow for a combination of genetic material between two individuals, which allows for the possibility of greater genetic fitness of the offspring.
Anostoma depressum is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Odontostomidae.
The reproductive system of gastropods varies greatly from one group to another within this very large and diverse taxonomic class of animals. Their reproductive strategies also vary greatly, see mating of gastropods.
The following is a glossary of common English language and scientific terms used in the description of gastropods.
Pseudunela cornuta is a species of minute sea slug, an acochlidian, a shell-less marine and temporarily brackish gastropod mollusk in the family Pseudunelidae. Adults are about 3 mm long and live in the spaces between sand grains.
Marstonia comalensis is a species of minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusk or micromollusk in the family Hydrobiidae. It is found in south central Texas, United States.
Galba meridensis is a species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusc in the family Lymnaeidae, the pond snails.
The reproductive system of planarians is broadly similar among different families, although the associated structures can vary in complexity.
Allobenedenia dischizosepta is a species of parasitic monogenean in the family Capsalidae. It has been found in waters off the coast of Argentina. It has been found infecting species of fish in the genus Acanthistius, such as the Argentine seabass.
This article incorporates public domain text from reference. [1]