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5 results for “Korotkevitschia”
FIGURES 15–20. Korotkevitschia pelagica. 15 in Redescription of Korotkevitschia pelagica (Korotkevitsch, 1961) (Enopla: Hoplonemertea: Cratenemertea), a pelagic nemertean from Antarctica
FIGURES 15–20. Korotkevitschia pelagica. 15, Oblique section through the anterior part of stomach to show the mouth opening, indicated by an arrow. ST, stomach. 16, Transverse section through pylorus, indicated by an arrow. IC, intestinal caecum; PR, proboscis. 17, Transverse section through the middle region of the body. Lateral nerve cords are indicated by arrows. IN, intestine. 18, Transverse section through the middle part of the rectum. The middorsal blood vessel is indicated by an arrow. LN, lateral nerve cord, RE, rectum. 19, Transverse section through the posterior part of the rectum showing sphincter of circular muscle (indicated by arrows). PC, posterior commissure of the nerve cords. 20, Transverse section through the testis. A lateral blood vessel is indicated by an arrow. IN, intestine; LN, lateral nerve cord; TE, testis.
FIGURES 9–14. Korotkevitschia pelagica. 9 in Redescription of Korotkevitschia pelagica (Korotkevitsch, 1961) (Enopla: Hoplonemertea: Cratenemertea), a pelagic nemertean from Antarctica
FIGURES 9–14. Korotkevitschia pelagica. 9, Transverse section through the stylet region of the proboscis. CE, "clot" of extracellular gel; SP, stylet pouch with accessory stylets. 10, Transverse section through the proboscis just behind stylet region to show subepithelial acidophilic glands (indicated by arrows). CE, "clot" of extracellular gel. 11, Oblique section through the anterior part of the head showing circumrhynchodaeal glands (indicated by arrows). 12, Transverse section through the left lateral nerve cord (LN) to show the band of connective tissue with myofibrils (indicated by an arrow). 13, Oblique section through the cerebral organ to show the sensory canal, indicated by an arrow. BR, brain; CO, cerebral organ; LP, lateral pouches of intestinal caecum. 14, Transverse section through the efferent canal (indicated by an arrow) of the excretory system. IN, intestine; LN, lateral nerve cord.
FIGURE 8 in Redescription of Korotkevitschia pelagica (Korotkevitsch, 1961) (Enopla: Hoplonemertea: Cratenemertea), a pelagic nemertean from Antarctica
FIGURE 8. Korotkevitschia pelagica. Schema of organization of middle proboscis portion. AG, acidophilic glands; CE, "clot" of extracellular gel; GE, outer glandular epithelium; IC, inner circular muscle layer; LM, longitudinal muscle layer; NS, neural sheath; OC, outer circular muscle layer; OE, outer epithelium of posterior proboscis portion; PN, proboscis nerve; PP, posterior proboscis chamber; SP, stylet pouch with accessory stylets.
FIGURE 1 in Redescription of Korotkevitschia pelagica (Korotkevitsch, 1961) (Enopla: Hoplonemertea: Cratenemertea), a pelagic nemertean from Antarctica
FIGURE 1. Korotkevitschia pelagica. Schema of internal organization of anterior portion in lateral view. BR, brain; CG, cephalic glands; CM, body wall circular muscle layer; CO, cerebral sensory organ; CR, circumrhynchodaeal gland cells; CV, cephalic blood vessel; DC, dorsal cerebral commissure; DE, dermis; EX, excretory tubules; FO, frontal organ; LM, body wall longitudinal muscle layer; LN, lateral nerve cord; LV, lateral blood vessel; LP, lateral pouches of intestinal caecum; PS, precerebral septum; RC, rhynchocoel; RD, rhynchodaeum; RM, cephalic retractor muscles; RP, rhynchopore; RS, rhynchodaeal sphincter of circular muscles; ST, stomach; VC, ventral cerebral commissure; VP, vascular plug of dorsal blood vessel.
FIGURES 2–7. Korotkevitschia pelagica. 2, Oblique section through a in Redescription of Korotkevitschia pelagica (Korotkevitsch, 1961) (Enopla: Hoplonemertea: Cratenemertea), a pelagic nemertean from Antarctica
FIGURES 2–7. Korotkevitschia pelagica. 2, Oblique section through a frontal organ. FO, frontal organ. Cephalic retractor muscles are indicated by arrows. 3, Oblique section to show body diagonal muscles, indicated by arrows. 4, Oblique section through the stomach wall. The stomach protrusion is indicated by the black arrow, the longitudinal fibres around the stomach wall are indicated by white arrows; ST, stomach. 5, Oblique section through the canal of the cerebral organ. The sensory canal is indicated by an arrow, the radial fibres are indicated by arrowheads. BR, brain; CO, cerebral organ. 6, Oblique section through the anterior part of the rhynchodaeum. The circumrhynchodaeal glands are indicated by an arrow. RD, rhynchodaeum; ST, stomach. 7, Oblique section through the rhynchocoel wall.
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