Project 3721: A. Ziegler, C. Sagorny. 2021. Holistic description of new deep sea megafauna (Cephalopoda: Cirrata) using a minimally invasive approach. BMC Biology. 19:81.
Specimen: Grimpoteuthis imperator Ziegler & Sagorny, 2021 (ZMB/Moll:240160)
View: Oblique

Abstract

Background: In zoology, species descriptions conventionally rely on invasive morphological techniques, frequently leading to damage of the specimens and thus only a partial understanding of their structural complexity. More recently, non-destructive imaging techniques have successfully been used to describe smaller fauna, but this approach has so far not been applied to identify or describe larger animal species. Here, we present a combination of entirely non-invasive as well as minimally invasive methods that permit taxonomic descriptions of large zoological specimens in a more comprehensive manner.
Results: Using the single available representative of an allegedly novel species of deep-sea cephalopod (Mollusca: Cephalopoda), digital photography, standardized external measurements, high-field magnetic resonance imaging, micro-computed tomography, and DNA barcoding were combined to gather all morphological and molecular characters relevant for a full species description. The results show that this specimen belongs to the cirrate octopod (Octopoda: Cirrata) genus Grimpoteuthis Robson, 1932. Based on the number of suckers, position of web nodules, cirrus length, presence of a radula, and various shell characters, the specimen is designated as the holotype of a new species of dumbo octopus, G. imperator sp. nov. The digital nature of the acquired data permits a seamless online deposition of raw as well as derived morphological and molecular datasets in publicly accessible repositories.
Conclusions: Using high-resolution, non-invasive imaging systems intended for the analysis of larger biological objects, all external as well as internal morphological character states relevant for the identification of a new megafaunal species were obtained. Potentially harmful effects on this unique deep-sea cephalopod specimen were avoided by scanning the fixed animal without admixture of a contrast agent. Additional support for the taxonomic placement of the new dumbo octopus species was obtained through DNA barcoding, further underlining the importance of combining morphological and molecular datasets for a holistic description of zoological specimens.


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Article DOI: https://doi.org/10.1186/s12915-021-01000-9

Project DOI: 10.7934/P3721, http://dx.doi.org/10.7934/P3721
This project contains
  • 41 Media
  • 5 Documents
  • 1 Taxon
  • 1 Specimen
Total size of project's media files: 204.72M

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    Authors' Institutions

    • Rheinische Friedrich-Wilhelms-Universit├Ąt Bonn (University of Bonn)



    Members

    member name taxa specimens media media
    notes
    Alexander Ziegler
    Project Administrator
    114141
    Christina Sagorny
    Full membership
    0000


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    Project views

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    Total project views12694
    Project overview1039
    Views for media list1252
    Taxon list382
    Documents list359
    Media views8730Media search (1265 views); M740038 (201 views); M740050 (185 views); M740045 (193 views); M740074 (185 views); M740041 (198 views); M740040 (203 views); M740044 (190 views); M740042 (192 views); M740071 (176 views); M740057 (176 views); M740072 (181 views); M740039 (183 views); M740043 (188 views); M740046 (187 views); M740047 (185 views); M740048 (180 views); M740049 (181 views); M740051 (188 views); M740052 (184 views); M740053 (184 views); M740054 (171 views); M740055 (185 views); M740056 (180 views); M740058 (175 views); M740059 (181 views); M740060 (178 views); M740061 (172 views); M740062 (173 views); M740063 (184 views); M740064 (176 views); M740065 (179 views); M740066 (173 views); M740067 (171 views); M740068 (178 views); M740069 (169 views); M740070 (178 views); M740073 (180 views); M740075 (194 views); M740076 (177 views); M740077 (176 views); M740078 (175 views);
    Bibliography268
    Specimen list664




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project137
    Media downloads30M740074 (4 downloads); M740042 (3 downloads); M740050 (3 downloads); M740038 (4 downloads); M740075 (2 downloads); M740041 (2 downloads); M740047 (1 download); M740045 (3 downloads); M740053 (1 download); M740039 (2 downloads); M740071 (1 download); M740051 (1 download); M740076 (1 download); M740073 (1 download); M740077 (1 download);
    Project downloads105
    Document downloads2Grimpoteuthis imperator organs (1 download); Grimpoteuthis imperator lower beak (1 download);