Annual Research & Review in Biology, ISSN: 2347-565X,Vol.: 10, Issue.: 3
An Intermetamorphic Larval Stage of a Mantis Shrimp and Its Contribution to the 'Missing-Element Problem' of Stomatopod Raptorial Appendages
Joachim T. Haug1,2*, Nicole R. Rudolf1, Philipp Wagner1, Paula T. Gundi1, Lara-Leonie Fetzer1 and Carolin Haug1,2 1Department of Biology II, LMU Munich, Biocenter, Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany. 2GeoBio-Center der LMU München, Richard-Wagner-Str. 10, 80333 Munich, Germany.
Joachim T. Haug1,2*, Nicole R. Rudolf1, Philipp Wagner1, Paula T. Gundi1, Lara-Leonie Fetzer1 and Carolin Haug1,2
1Department of Biology II, LMU Munich, Biocenter, Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany.
2GeoBio-Center der LMU München, Richard-Wagner-Str. 10, 80333 Munich, Germany.
(1) George Perry, Dean and Professor of Biology, University of Texas at San Antonio, USA.
(1) Azizur Rahman, University of Toronto, Canada.
(2) Flavio de Almeida Alves Júnior, Universidade Federal de Pernambuco, Brazil.
Complete Peer review History: http://sciencedomain.org/review-history/14626
In eumalacostracan crustaceans the thoracic appendages usually have seven elements along the main axis of the appendage. Mantis shrimps are an exception: their raptorial sub-chelate maxillipeds (anterior thoracopods) have only six such elements. Hence it has been speculated which two of the original seven elements have become conjoined in mantis shrimps. So far this question remains unanswered due to the lack of a proper reference point of identifying individual original elements. One candidate for such a reference point would be the exopod, which is unfortunately absent in adult stomatopods. Antizoea larvae possess exopods on the maxillipeds, but lack subdivision along the main axis of the appendage. We describe here a specimen that is right in the transition between the antizoea larval phase and the next larval phase (erichthus). It still possesses an exopod, but also additionally a subdivision into discrete elements on the maxillipeds. With this it provides an important reference scheme for solving the elemental identity in mantis shrimp maxillipeds. Our study aims at contributing new data to the identification of individual original elements of stomatopod maxillipeds. Our findings clearly falsify the suggestion that the basipod has become conjoined either with the coxa or with the endopod element 1 (ischium). In conclusion, our findings in combination with data from the fossil record suggest that stomatopods possess a carpo-propodus.
Stomatopoda; larva; antizoea; palaeo-evo-devo; metamorphosis.
Full Article - PDF Page 1-19
DOI : 10.9734/ARRB/2016/25938Review History Comments