Chthamalus undetermined
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publication ID |
https://doi.org/ 10.1093/zoolinnean/zlaa159 |
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https://doi.org/10.5281/zenodo.5636895 |
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persistent identifier |
https://treatment.plazi.org/id/039ACB51-881B-FFC4-FC4B-F993FE34FE98 |
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treatment provided by |
Plazi |
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Chthamalus undetermined |
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( FIGS 1C View Figure 1 , 4–6 View Figure 4 View Figure 5 View Figure 6 )
Material examined: Chthamalus sp. from Praia, Santiago GoogleMaps , Cape Verde (14°55′53″N, 23°30′45″W). For comparison, we used samples from Boccadasse Beach, Genoa, Italy (44°23′23″N, 8°58′24″E) GoogleMaps , Biarritz , France (43°28′48″N, 1°33′20″W) GoogleMaps and Las Palmas , Gran Canaria, Spain (28°5′59″N, 15°24′48″W) GoogleMaps .
Description: Shell low conic ( Figs 1C View Figure 1 , 4A View Figure 4 ); opercular aperture kite shaped in small specimens, circular in big specimens. Scutum ( Figs 4B–D View Figure 4 ) triangular; occuludent margin forms a right angle with tergal margin. Deep, round pit for adductor muscle occupies about half of width of scutum; no articular ridge. Small pit for the lateral scutal depressor muscle. Tergum ( Figs 4B–D View Figure 4 ) triangular; carinal margin arched, with no spur. At the angle between carinal and scutal margins, a projection interlocks with an indentation in the tergal margin of the scutum, close to the basal margin. Three to four small crests for tergal depressor muscle. Suture between scutum and tergum sinusoidal ( Figs 1C View Figure 1 , 4A View Figure 4 ).
Labrum ( Fig. 5A View Figure 5 ) has slightly concave cutting edge, with small teeth. Palpi club shaped (rectangular), with long simple setae at distal part and short on the upper margin ( Fig. 5B View Figure 5 ).
Maxilla ( Fig. 5C, D View Figure 5 ) bilobed; lobes round, with simple setae along interior margin and distal part. Maxillule ( Fig. 5E View Figure 5 ) with two large spines at distal end followed by a notch and a series of smaller spines; stout setae at lower angle. Short, simple type of setae on surface of maxillule close to cutting edge.
Mandible ( Fig. 5F View Figure 5 ) with four teeth; lower one bidentate. A series of small spines along cutting margin; at edge two bigger spines; long bristles at lower part.
Cirrus I ( Fig. 6A View Figure 6 ) anterior ramus longer than posterior; segments carry simple and plumose setae. Conical spines on two proximal articles of the anterior ramus ( Fig. 6F View Figure 6 ). Cirrus II ( Fig. 6B View Figure 6 ) shorter than cirrus I; terminal articles with bidenticulate setae ( Fig. 5G, H View Figure 5 ); in some setae, pair of ‘basal guards’ ( Fig. 6G View Figure 6 ). Cirrus III anterior ramus is longer than posterior ( Fig. 6C View Figure 6 ). Cirri IV–VI are similar; each segment carries four or five spines of gradual size, with rami more or less of same length. Penis annulated, with short setae scattered along the penis.
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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