Extreme morphologies of mantis shrimp larvae

Haug, Carolin; Ahyong, Shane T.; Wiethase, Joris; Olesen, Jørgen; Haug, Joachim T.

doi:10.1590/2358-2936e2016020

Cited by 14 publications

(13 citation statements)

References 20 publications

(27 reference statements)

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“…Although the report of only two specimens provides the impression that such larvae are rare, this is very likely a bias based on the scientific tradition of not or only rarely reporting larvae from plankton samples that cannot be identified to species. Similar recent finds of giant larvae are known from mantis shrimps [11]. Recognising groups with such large, possibly long-dispersal larvae is of importance for conservation biology.…”

Section: Size and Macroplanktonsupporting

confidence: 68%

“…4a, 5a). Comparable ridges and keels are known in large larvae of mantis shrimps [11] and polychelidan lobsters [6,34]. These might mechanically stabilise the large shields.…”

Section: Comparison Of Both Specimensmentioning

confidence: 99%

“…Mouthparts: The labrum, mandible, paragnaths, maxillula, and maxilla seem to be rather similar in all anomalan larvae [37] (see Figs. 10,11,12,21,22). Endopod and exopod of maxillula and maxilla differ just slightly in shape, the distribution of setae and the number of structures is identical.…”

Section: Comparison Of Both Specimensmentioning

confidence: 99%

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Giant planktic larvae of anomalan crustaceans and their unusual compound eyes

et al. 2020

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Crustacean larvae are usually recognised as small organisms, below one millimeter body size. However, in different crustacean groups such as Stomatopoda, Polychelida, or Achelata, also very large larvae occur with sizes of 20 mm and beyond. Also from few meiuran species ("short-tailed" crustaceans, including crabs, hermit crabs, or squat lobsters), rather large larvae are known, though still considerably smaller than 20 mm. We present here two specimens of anomalan meiuran larvae, each with a total length of 24 mm, which by far exceed the previously known/ reported maximum sizes of meiuran larvae. Yet, both specimens exhibit characters that indicate their identity as zoea larvae (first larval phase with several stages), most likely shortly before the metamorphosis to the megalopa (second larval phase with one stage). Due to this early developmental state, it is difficult to provide a narrower systematic identification of the larvae. In addition to the description of the developmental status of all appendages, we also investigated the gizzard and especially the compound eyes. The latter possess a mixture of hexagonal, intermediate, and square-shaped facets in an unusual arrangement. We documented the exact arrangement of the facets in both specimens and discuss the possible restructuring during metamorphosis. The arrangement of the different types of facets indicates that transformation to an adult eye structure takes place over several moults and that the facets are being rearranged in this process. The findings demonstrate that also meiuran larvae contribute to the fraction of the macro-plankton.

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Section: Size and Macroplanktonsupporting

confidence: 68%

“…4a, 5a). Comparable ridges and keels are known in large larvae of mantis shrimps [11] and polychelidan lobsters [6,34]. These might mechanically stabilise the large shields.…”

Section: Comparison Of Both Specimensmentioning

confidence: 99%

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Giant planktic larvae of anomalan crustaceans and their unusual compound eyes

et al. 2020

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“…It is possible to recognise a larva as something special, even without being able to narrow down its taxonomic identity very far. Especially for representatives of Insecta and their relatives there are numerous examples of larvae that cannot be easily taxonomically treated, but still provide important information for various zoological questions:A larva may possess an unusual, so far unknown or unrecognised overall morphology (Williamson, 1960; Henry, 1978; Gamô, 1979; Martin & Ormsby, 1991; Chen et al, 2014; Haug & Haug, 2014; Haug et al, 2016a; Rudolf, Haug & Haug, 2016). A larva may possess a combination of characters so far unknown or unrecognised for a specific larval stage (Villamar & Brusca, 1988; Lindley et al, 2002; Haug et al, 2016b).…”

Section: Introductionmentioning

confidence: 99%

Beetle larvae with unusually large terminal ends and a fossil that beats them all (Scraptiidae, Coleoptera)

Haug

2019

PeerJ

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Larvae, and especially fossil larvae, are challenging to deal with from a purely taxonomic view. Often one cannot determine which species the larvae belong to. Yet, larvae can still contribute to various scientific questions. Especially morphological traits of a fossil larva can be highly informative for reconstructing character evolution. Also the occurrence of specific larval types and larval characters in time and the disappearance of such forms can well be reconstructed also without being able to narrow down the phylogenetic relationship of a larva very far. Here, we report two new beetle larvae preserved in Baltic amber which are identified as representatives of Scraptiidae, based on an enlarged terminal end (‘9th abdomen segment’); this is only the third record of such larvae. In comparison to modern forms, the terminal ends of the two new fossil larvae is even larger in relation to the remaining body than in any known larva. Unfortunately, our knowledge of such larvae in the modern fauna is very limited. Still, one of the two already known fossil larvae of Scraptiidae also has a very long terminal end, but not as long as those of the two new fossils. These three fossil larvae therefore seem to possess a specific morphology not known from the modern fauna. This might either mean that they (1) represent a now extinct larval morphology, a phenomenon well known in other euarthropodan lineages, or that (2) these forms represent a part of the larval phase not known from modern day species as they have not been described yet; such cases occur in closely related lineages. In any case, the fossils expand the known diversity of larval morphologies.

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“…Of the approximately 500 species of stomatopods described so far, no more than 10% of the larval stages can be identified worldwide (Diaz, 1998;Haug et al, 2016). Moreover, there are only a few studies where the complete larval development of stomatopod larvae has been described (Manning and Provenzano, 1963;Pyne, 1972;Provenzano and Manning, 1978;Greenwood and Williams, 1984;Hamano and Matsuura, 1987;Morgan and Goy, 1987).…”

Section: Introductionmentioning

confidence: 99%

Morphology of stomatopod larvae from National Parks: Sistema Arrecifal Veracruzano and Arrecife Puerto Morelos, Mexico

et al. 2018

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Th e present study provides information on the morphology of stomatopod larvae found in two diff erent reef systems which are also considered national parks: the Sistema Arrecifal Veracruzano (SAVNP) and Arrecife Puerto Morelos (APMNP). Zooplankton samples were collected at 26 stations of the SAVNP and four stations of the APMNP. Stomatopod larvae were identifi ed and classifi ed by their larval stage. We found representatives of three stomatopod superfamilies: the superfamily Gonodactyloidea Giesbrecht, 1910 was represented by Neogonodactylus oerstedii (Hansen, 1895), Neogonodactylus wennerae Manning and Heard, 1997, and Pseudosquillidae genus and species indeterminate; the superfamily Lysiosquilloidea Giesbrecht, 1910 was represented by Lysiosquilloidea genus and species indeterminate, Lysiosquilla sp., Lysiosquilla scabricauda (Lamarck, 1818) and Nannosquilla adkisoni Camp and Manning, 1982; the superfamily Squilloidea was represented by larvae of Alima neptuni (Linnaeus, 1768), Squilla spp., and Squilla empusa Say, 1818. We were able to identify and describe four stages of larval development for orcid.org/0000-0003-0531-5557Cházaro-Olvera et al. 2Larval morphology of mantis shrimps Nauplius, 26: e2018005 representatives of these superfamilies. This is the first study describing several stages of larval development of different species of the stomatopods from the Gulf of Mexico and Caribbean Sea.

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Extreme morphologies of mantis shrimp larvae

Cited by 14 publications

References 20 publications

Giant planktic larvae of anomalan crustaceans and their unusual compound eyes

Giant planktic larvae of anomalan crustaceans and their unusual compound eyes

Beetle larvae with unusually large terminal ends and a fossil that beats them all (Scraptiidae, Coleoptera)

Morphology of stomatopod larvae from National Parks: Sistema Arrecifal Veracruzano and Arrecife Puerto Morelos, Mexico

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