Published April 20, 2021
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Table 2 in Long distance dispersal and pseudo-cryptic species in Gastrotricha: first description of a new species (Chaetonotida, Chaetonotidae, Polymerurus) from an oceanic island with volcanic rocks
Authors/Creators
- 1. Laboratory of Evolutionary Meiofaunal Organisms, Department of Animal Biology, Institute of Biology, University of Campinas, Monteiro Lobato, 255, CEP 13083 - 862, Campinas, SP, Brazil.
Description
Table 2 (continued on next page). Morphometric features of Polymerurus insularis sp. nov. All scale lengths for which the scale type is not specified are from Type 1 scales. Abbrevation: N = total number of measured adult specimens.
| Features | Range (µm) | Mean (µm) | N |
|---|---|---|---|
| Total body length | 215–408 | 322 | 5 |
| Body length (furcal rami excluded) | 139–308 | 222 | 5 |
| Furcal rami length | 91.5–94.5 | 93 | 2 |
| Furcal rami + adhesive tubes length | 109–117 | 113 | 2 |
| Adhesive tubes length | 16–23 | 19.5 | 2 |
| Furca base width | 26.5–27.5 | 27 | 1 |
| Number of furcal rami segments per side | 19–21 | 20 | 1 |
| Length of ornamentation bristles on the furcal rami segments | 4–8 | 6 | 3 |
| Body width at head | 24–42 | 32 | 4 |
| Body width at medium length | 31–55 | 40 | 4 |
| Body width at furca base | 23–25 | 24 | 4 |
| Diameter of mouth ring | 8–13 | 10 | 3 |
| Number of cephalic lobes | 3 | 3 | 1 |
| Number of head cilia tufts | 4 | 4 | 3 |
| Length of first cilia tuft | 9–12 | 10.5 | 1 |
| Length of second cilia tuft | 11–19.5 | 14 | 1 |
| Cephalion length | 19–25 | 23 | 3 |
| Cephalion width | 20–36 | 28 | 2 |
| Lateral projections (lappets) length | 10–18 | 14 | 3 |
| Pleurae length | 12–15 | 14 | 3 |
| Hypostomium length | 13–17 | 15 | 2 |
| Pharynx length | 74 | 74 | 1 |
| Pharynx width at upper length | 19 | 19 | 1 |
| Pharynx width at medium length | 25 | 25 | 1 |
| Pharynx width at pharingeointestinal junction | 27 | 27 | 1 |
| Egg width | 30 | 30 | 1 |
| Protonephridia length | 105 | 105 | 1 |
| Length of locomotory cilia | 5–8.5 | 7 | 1 |
| Total number of longitudinal columns of scales | 42 | 42 | 1 |
| Number of scales in a single longitudinal column | 55 | 55 | 1 |
| Total number of horizontal rows of scales | 64 | 64 | 1 |
| Number of scales in a single horizontal row | 10 | 10 | 1 |
| Length of neck dorsolateral scales | 3.5–8.5 | 6 | 4 |
| Length of middle trunk dorsal scales | 5.5–9 | 8.5 | 2 |
| Length of middle trunk lateral scales | 6.5–11 | 8.5 | 2 |
| Length of rear dorsolateral scales | 7.5–9 | 6 | 2 |
| Length of rear triangular scale (Type 2) | 5–7 | 6 | 3 |
| Length of small rounded scales with posterior spines (Type 3) | 4.5 | 4.5 | 1 |
| Length of rear dorsal small scales (Type 4) | 2.5–5 | 3 | 1 |
| Length of rear indented scales (Type 5) | 7–8 | 7.5 | 1 |
| Length of neck ventral scales | 3.5–5 | 4 | 2 |
| Length of middle trunk ventral scales | 4.5 | 4.5 | 1 |
| Length of rear trunk ventral scales | 4–7 | 5 | 1 |
| Length of keeled ventral scales (Type 6) | 9.5–10 | 10 | 1 |
| Length of small ventral elongated scales (Type 7) | 3.5–4 | 3.5 | 1 |
| Length of small ventral round scales (Type 8) | 4.5–7 | 6 | 1 |
| Length of head and neck dorsolateral spines | 2–13 | 7.5 | 2 |
| Length of upper trunk dorsolateral spines | 8–15 | 11.5 | 2 |
| Length of middle trunk dorsolateral spines | 8.5–22.5 | 15.5 | 5 |
| Length of rear trunk and furca base dorsolateral spines | 18–33 | 25.5 | 5 |
| Length of neck ventral spines | 5.5–7.5 | 6.5 | 1 |
| Length of trunk ventral spines | 5.8–9.8 | 8 | 2 |
| Length of rear ventral spines | 5.7–15 | 10 | 1 |
| Length of keels on Type 6 scales | 6–7 | 6.5 | 1 |
Notes
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