An Intermetamorphic Larval Stage of a Mantis Shrimp and Its Contribution to the 'Missing-Element Problem' of Stomatopod Raptorial Appendages
Journal Title: Annual Research & Review in Biology - Year 2016, Vol 10, Issue 3
Abstract
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.
Authors and Affiliations
Joachim T. Haug, Nicole R. Rudolf, Philipp Wagner, Paula T. Gundi, Lara-Leonie Fetzer, Carolin Haug
Keywords
Related Articles
- EP ID EP351059
- DOI 10.9734/ARRB/2016/25938
- Views 104
- Downloads 0
Identification of Bean Rust (Uromyces appendiculatus) Races on Isolates Collected from Nyamira County and Narok South Sub County, Kenya
Common bean rust (Uromyces appendiculatus) is an etiological agent of bean rust disease of common beans (Phaseolus vulgaris L.) that causes damage and consequent yield losses. The high and wide virulence variability of t...
Disruption of the Pp1-87B Gene Stimulates Tumor Formation in the Eye of Drosophila
Protein phosphatases are a set of enzymes in charge of the dephosphorylation of several proteins and enzymes in a cell. Dephosphorylation process is essential for organizing a huge number of cellular actions. In Drosophi...
Estimation of Stability of Arterial Pressure and Pulse at Changes of Geomagnetic Data and Atmospheric Pressure
This work analyses annual blocks of daily observations of pulse with arterial blood pressure (ABP) and interrelation between them. Dynamics of morning and evening parameters is compared, behavior of atmospheric pressure...
Levels of Interleukin‐18 in Saliva and Gingival Crevicular Fluid in Patients with Chronic Periodontitis and Healthy Subjects
Aims: Cytokines play a key role in the initiation and progression of chronic periodontitis. This study aimed to measure and compare the levels of Interleukin (IL)-18 in both saliva and gingival cervicular fluid (GCF) of...
Ontogeny of the Lim Code in the Mouse Gonads
Lim genes are developmentally regulated transcription factors involved in tissue specification and cell differentiation. Several Lim genes are present in the mammalian genome and each tissue expresses a unique pattern of...