Protoglossus mackiei, Deland & Cameron & Rao & Ritter & Bullock, 2010
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publication ID |
https://doi.org/ 10.11646/zootaxa.2408.1.1 |
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publication LSID |
lsid:zoobank.org:pub:9BBB84BB-239C-41EA-9CFC-682449F96281 |
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persistent identifier |
https://treatment.plazi.org/id/101A87CA-FF8D-FFA4-DBA6-FF34F86AF8AD |
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treatment provided by |
Felipe |
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scientific name |
Protoglossus mackiei |
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sp. nov. |
Protoglossus mackiei View in CoL n. sp.
( Fig. 1B View FIGURE 1 ; 4A–F View FIGURE 4 )
Material examined. Three complete specimens were collected by Theodore H. Bullock at Moss Beach, San Mateo, California (37°52' N, 122°52' W) on 22 May 1939. Holotype: Accession no. NMNH 71493 View Materials and the paratype is USNM 1132792 About USNM , Smithsonian Institution. Smithsonian Institution. Individuals have been found under rocks resting in coarse sand and are not in tubes or holes. GoogleMaps
External features. Shape of proboscis of preserved specimens conical, not short or round. Collar broader than long, with ruffled anterior border and dark central area. Length of preserved specimens 25 mm, width ca. 2 mm. Collar yellow, proboscis and trunk white, in living material.
Internal features. Nerve-fiber layer of proboscis thickened middorsally ( Fig. 4A View FIGURE 4 ). Proboscis coelom extending to tip of organ as narrow cavity closely surrounding proboscis complex. Ventral and dorsal septa present, starting in proboscis complex; both continuous throughout length of organ. Circular-muscle-fiber layer thinner than nerve-fiber layer. Longitudinal muscle fibers arranged in radial plates, but not as well defined as in Horstia . Glomerulus small, extending over tip of stomochord as two small lateral wing-shaped projections ( Fig. 4A View FIGURE 4 and inset). Cardiac vesicle well developed, covering only dorsal side of stomochord ( Fig. 4A View FIGURE 4 and inset). Stomochord with thick walls and continuous narrow lumen that gives off single small ventral diverticulum anterior to pore where skeletal plate is forming. Proboscis with deep dorsal groove posteriorly. Skeleton with well-developed acute keel ( Fig. 4B, C View FIGURE 4 ). Two coelomic cavities in neck; a conspicuous left vesicle leading to exterior by left proboscis pore ( Fig. 4B View FIGURE 4 ).
Dorsal and ventral mesenteries of collar both complete. Perihaemal diverticula starting at level of proboscis pore, separate throughout their length ( Fig. 4C View FIGURE 4 ). Peribuccal coeloms absent. Skeletal cornua extending to posterior margin of collar, confined to dorsolateral aspect ( Fig. 4D View FIGURE 4 ). Cornua projecting into lateral walls of buccal cavity, forming two dorsolateral evaginations (parabuccal ridges) along their length. Collar canals well developed and horizontal ( Fig. 4E View FIGURE 4 and inset). Two lacunae often present in dorsal nerve cord ( Fig. 4D View FIGURE 4 inset), one on each side, these not continuous throughout whole length of cord. A small anterior neuropore present ( Fig. 4C View FIGURE 4 ); posterior one present or lacking. Collar longitudinal muscles well developed, present as two irregular masses on each side of collar lumen ( Fig. 4D,E View FIGURE 4 ).
Branchial portion of pharynx equal in size to ventral portion or slightly larger ( Fig. 4F View FIGURE 4 ). Pair of dorsolateral gonads present, not prominent on surface of body. Well-developed branchial sacs opening by dorsolateral pores. Presence of intestinal pores not determined. Ventrolateral longitudinal muscles of trunk well developed but not forming ridges.
Remarks. We dedicate this animal to Professor George O. Mackie, University of Victoria, who extensively contributed to our understanding of the form and function of invertebrates of the Pacific Coast of North America.
The defining characters of Protoglossus mackiei are listed below:
A. Proboscis is conical with a deep posterior dorsal groove.
B. Longitudinal musculature of the proboscis is in radiating plates.
C. Dorsal and ventral mesenteries are present in the proboscis and collar but the ventral mesentery is absent in the trunk.
D. Perihaemal diverticula are present and start in the neck.
E. Peribuccal diverticula are absent.
F. There is an anterior neuropore.
G. There are parabuccal ridges in the collar on either side of the buccal cavity.
H. Collar canals are well developed and horizontal.
I. The two rows of lateral gonads do not form ridges.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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