Figures & data
Figure 1. The position of the 335 sampling stations covered by the MAREANO programme from 2006 to 2018, from which the material of Scalpellidae cirripeds was collected. + are stations without records of scalpellids and black dots indicate that scalpellids were recorded.
Figure 2. For species identification of Scalpellidae cirripeds the valves on capitulum (upper part of the stalked cirriped) and the stalk (peduncle) that attaches the specimen to the preferred host or substratum are important. The names of the valves on capitulum are indicated by letters superimposed on the capitulum of Weltnerium stroemii: rostrum (r), latus rostrale (lr), latus inframedium (li), latus carinale (lc), scutum (sc), upper latur (ul): carina (ca), tergum (t).
Figure 3. The morphology of the seven Scalpellidae species that are found in the Mareano material from Norwegian waters. A: Weltnerium stroemii; B: Scalpellum scalpellum; C: Amigdoscalpellum hispidum; D: Weltnerium nymphocola; E: Catherinum striolatum; F: Weltnerium cornutum; G: Hamatoscalpellum hamatum. Scale bar = 1 mm.
Table 1. Number of individuals recorded by gear for the seven Scalpelidae species in the MAREANO material collected from 2006 to 2018.
Figure 4. A box plot of the depth distribution for the seven species of Scalpellidae cirripeds recorded in the MAREANO material from 2006 to 2018. The box shows the second and third quartile (50% of the measurements) with the median as the horizontal line, and the vertical line indicating the maximum and minimum values. Observations are shown as circles including outliers. Shelf slope break and upper and lower shelf are marked with a dotted horizontal line.
Figure 5. A box plot of the temperature distribution for the seven species of Scalpellidae cirripeds recorded in the MAREANO material from 2006 to 2018. The box shows the second and third quartile (50% of the measurements) with the median as the horizontal line, and the vertical line indicates the maximum and minimum values. Observations are indicated with circles including outliers. Dotted horizontal line marks the depth of the shelf-slope break and the border between upper and lower shelf below which the temperature is <0°C.
Figure 7. Scalpellum scalpellum attached to the spines of Cidaris cidaris from material sampled by MAREANO from station R1046 at 194 m depth.
Figure 8. Weltnerium stroemii attached to a hydroid. Photo from the MAREANO video station R1292VL1331.
Table 2. The scalpellidae species recorded in this study listed from most to least records.