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Atlanta vanderspoeli Wall-Palmer, Hegmann & Peijnenburg, 2019

This species is identified by the apical angle of the larval shell, which is broader than A. turriculata, but more narrow than A. brunnea. Atlanta vanderspoeli is only known from the equatorial and southern Pacific Ocean.

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  • The apical angle of the larval shell is 35.9–45.8° (A. brunnea 58.7–71.0°, A. turriculata 17.4–32.2°).

  • The spire is formed of 3¼ to 4 whorls and is a tall conical shape.

  • The larval shell has a prominent carina/ridge slightly above mid-whorl height. The whorls of the larval shell are covered in a micro-ornamentation of interrupted spiral lines and small projections roughly arranged in spiral lines (approximately five lines in total) above this carina, and zig-zagged ornamentation below it.

  • Fresh specimens vary in colour from brown to pink-purple. The soft tissues of the foot/fin and sucker can be mottled black 

  • The adult shell is very small, reaching only 1.0 mm without the keel.

  • The keel is tall (~0.4 mm) and transparent and inserts between the final and penultimate whorls in large specimens.

  • Eye type a, operculum type a.

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NB: This species has not yet been added to WoRMS and the species name is not yet accepted by BOLD (currently A. brunnea).

 

Similar species:

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Further Reading:

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van der Spoel, S. 1976. Notes on the identification and speciation of Heteropoda (Gastropoda). Zoologische mededelingen 47: 545–560. 

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van der Spoel, S. 1972. Pseudothecosomata. Gymnosomata and Heteropoda. Bohn, Scheltema & Holkema, Utrecht, 484 pp. 

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Wall-Palmer, D., Hegmann, M., Goetze, E., Peijnenburg, K.T.C.A. 2019.  Resolving species boundaries in the Atlanta brunnea species group (Gastropoda, Pterotracheoidea). ZooKeys,  899: 59–84  doi: 10.3897/zookeys.899.38892 

 

Wall-Palmer, D., Burridge, A.K., Goetze, E., Stokvis, F., Janssen, A.W., Mekkes, L., Moreno-Alcántara, M., Bednaršek, N., Schiøtte, T., Vinther Sørensen, M., Smart, C.W., Peijnenburg, K.T.C.A. Biogeography and genetic diversity of the atlantid heteropods. Progress in Oceanography, 160:1–25. doi: 10.1016/j.pocean.2017.11.004

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WoRMS
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