12 research outputs found

    Arthrotardigrada Marcus 1927

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    Order: Arthrotardigrada Marcus, 1927 Family: Anisonychidae MĂžbjerg, JĂžrgensen & Kristensen, 2019Published as part of PĂ©rez-Pech, Wilbert AndrĂ©s, JesĂșs-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril & Hansen, Jesper Guldberg, 2020, Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae), pp. 492-508 in Zootaxa 4731 (4) on page 494, DOI: 10.11646/zootaxa.4731.4.3, http://zenodo.org/record/366194

    Megastygarctides McKirdy, Schmidt & McGinty-Bayly 1976

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    Megastygarctides sp. 21 specimens (PM: 8 females, 9 males, 4 indeterminable gender) Remarks: A sufficient number of specimens were recovered for both light microscopy (LM) and SEM studies enabling the new species status of these specimens to be confirmed. This taxon will be described in a separate paper together with another undescribed Megastygarctides species recovered during a concurrent study (in prep.) in the same region.Published as part of PĂ©rez-Pech, Wilbert AndrĂ©s, JesĂșs-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril & Hansen, Jesper Guldberg, 2020, Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae), pp. 492-508 in Zootaxa 4731 (4) on page 497, DOI: 10.11646/zootaxa.4731.4.3, http://zenodo.org/record/366194

    Florarctinae Renaud-Mornant 1982

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    Florarctinae sp. Material examined: 1 specimen (PM: 1 male) Remarks: The single collected specimen clearly belongs to the subfamily Florarctinae due to the presence of alae and hook-shaped peduncles on all feet. Only the frontal ala and very small anterolateral alae without ceastus are present. The caudal ala and posteriolateral alae are absent. Stylet supports, which are typically absent within Florarctinae, are present. Another prominent character of this specimen that is not typical of the subfamily is a large mediodorsal pedestal/lobe on which the median cirrus is inserted. The unusual combination of the presence of stylet supports and the absence of posteriolateral alae, caudal alae and ceasti prevents the placement of the specimen into any of the known genera of Florarctinae.Published as part of PĂ©rez-Pech, Wilbert AndrĂ©s, JesĂșs-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril & Hansen, Jesper Guldberg, 2020, Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae), pp. 492-508 in Zootaxa 4731 (4) on page 497, DOI: 10.11646/zootaxa.4731.4.3, http://zenodo.org/record/366194

    Florarctinae Renaud-Mornant 1982

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    Subfamily: Florarctinae Renaud-Mornant, 1982 Genus: incertae genusPublished as part of PĂ©rez-Pech, Wilbert AndrĂ©s, JesĂșs-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril & Hansen, Jesper Guldberg, 2020, Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae), pp. 492-508 in Zootaxa 4731 (4) on page 497, DOI: 10.11646/zootaxa.4731.4.3, http://zenodo.org/record/366194

    Dipodarctus subterraneus

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    Dipodarctus cf. subterraneus (Renaud-Debyser, 1959) 3 specimens (PM: 1 female; ML: 2 indeterminable gender) Remarks: All three specimens display digits of almost equal length on legs I–III with digit 3 only slightly longer than the others. They generally fall within the limits of the species descriptions of both D. subterraneus and D. anaholensis Pollock, 1995. A precise identification is hindered by the poorly defined diagnoses of these two taxa (see JĂžrgensen et al. 2014 and Bartels et al. 2018). As the type location of D. subterraneus is adjacent to the Caribbean (Bahamas) the specimens are considered as Dipodarctus cf. subterraneus pending a revision of the species.Published as part of PĂ©rez-Pech, Wilbert AndrĂ©s, JesĂșs-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril & Hansen, Jesper Guldberg, 2020, Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae), pp. 492-508 in Zootaxa 4731 (4) on page 497, DOI: 10.11646/zootaxa.4731.4.3, http://zenodo.org/record/366194

    Wingstrandarctus corallinus Kristensen 1984

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    Wingstrandarctus corallinus Kristensen, 1984 3 specimens (PM: 2 female, 1 male) Comparative material: 1 specimen reported as Wingstrandarctus by PĂ©rez-Pech et al. (2018) (ML: 1 female) Remarks: Analysis of all three collected specimens and a re-examination of the single Wingstrandarctus of PĂ©rez- Pech et al. (2018) determined that all four individuals represent the species W. corallinus. The set of characters that define the species as determined by Kristensen (1984) are evident including: the presence of cephalic bacterial vesicles, a small, almost circular caudal ala, dorsal mammilliform cuticular sculpture, and the specific shape of the lateral alae.Published as part of PĂ©rez-Pech, Wilbert AndrĂ©s, JesĂșs-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril & Hansen, Jesper Guldberg, 2020, Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae), pp. 492-508 in Zootaxa 4731 (4) on page 497, DOI: 10.11646/zootaxa.4731.4.3, http://zenodo.org/record/366194

    Halechiniscidae Thulin 1928

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    Family: Halechiniscidae Thulin, 1928 Subfamily: incertae subfamiliaePublished as part of PĂ©rez-Pech, Wilbert AndrĂ©s, JesĂșs-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril & Hansen, Jesper Guldberg, 2020, Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae), pp. 492-508 in Zootaxa 4731 (4) on page 496, DOI: 10.11646/zootaxa.4731.4.3, http://zenodo.org/record/366194

    Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae)

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    PĂ©rez-Pech, Wilbert AndrĂ©s, JesĂșs-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril, Hansen, Jesper Guldberg (2020): Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae). Zootaxa 4731 (4): 492-508, DOI: https://doi.org/10.11646/zootaxa.4731.4.

    Dipodarctus Pollock 1995

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    Dipodarctus sp. 1 specimen (PM: 1 indeterminable gender) Comparative material: 36 specimens reported as Dipodarctus by PĂ©rez-Pech et al. (2018) (ML: gender determinations not attempted) Remarks: The single specimen from Puerto Morelos displays a set of characters that are typical of the genus including: the primary clavae much longer than, and ventral to the lateral cirri; innermost digit (digit 1) on legs I–III slightly shorter than the other digits; and digit 3 slightly longer than the other digits. The specimen is distinguished from all described members of the genus by a set of dorsolateral wing-like structures. The nature of these unique structures requires further investigation pending the recovery of more specimens. The single specimen was determined not to represent the same taxon as those used to establish the generic record of Dipodarctus by Perez-Pech et al. (2018) for Mexico. Re-examination of the latter specimens found that these should be regarded as Halechiniscus cf. perfectus Schulz, 1955 because they correspond to the limited description of that species but digit 3 on leg pairs I–III is slightly longer than the other digits. This digit pattern is characteristic of Dipodarctus as opposed to Halechiniscus, hence the confusion regarding the assignment of the specimens to the former genus by PĂ©rez-Pech et al. (2018). Therefore, only one record for ‘ Dipodarctus sp.’, i.e. the present, should be considered as valid for Mexico.Published as part of PĂ©rez-Pech, Wilbert AndrĂ©s, JesĂșs-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril & Hansen, Jesper Guldberg, 2020, Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae), pp. 492-508 in Zootaxa 4731 (4) on page 496, DOI: 10.11646/zootaxa.4731.4.3, http://zenodo.org/record/366194

    Paratanarctus D'Addabbo Gallo, de Zio Grimaldi, Morone De Lucia & Troccoli 1992

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    Paratanarctus sp. 1 specimen (PM: 1 female) Remarks: In comparison to the only described species of the genus, P. kristenseni D’Addabbo Gallo, de Zio Grimaldi, Morone De Lucia & Troccoli, 1992 the collected specimen is of similar body dimensions (body length 124 ÎŒm, body width 52 ÎŒm vs. body length 125 ÎŒm, body width 55 ÎŒm in P. kristenseni female holotype). Both taxa have a lance-shaped tarsus and with pretarsus. However, the Mexican specimen is clearly not P. kristenseni as demonstrated by the presence of brown eyes, completely spherical vesicles of the seminal receptacles, the absence of proximal pads, and the leg IV sense organ being in the form of a large enveloped papilla. As Paratanarctus is monotypic, the significance of other characters should be evaluated by comparison to the type material of P. kristenseni. However, the type material of this species is currently unavailable (D’Addabbo Gallo, personal communication).Published as part of PĂ©rez-Pech, Wilbert AndrĂ©s, JesĂșs-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril & Hansen, Jesper Guldberg, 2020, Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae), pp. 492-508 in Zootaxa 4731 (4) on page 498, DOI: 10.11646/zootaxa.4731.4.3, http://zenodo.org/record/366194
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