Merostomes

Description: English: Mangrove Horseshoe Crab (Carcinoscorpius rotundicauda). Date: 24 December 2019. Source: https://www.inaturalist.org/photos/58425561. Author: zhangshen. Camera location20° 55′ 51″ N, 110° 09′ 08.99″ E View all coordinates using: OpenStreetMap 20.930834; 110.152496. : This media file is part of an observation on iNaturalist:inaturalist.org/observations/36910857This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing. : This image was originally posted to iNaturalist by zhangshen at https://www.inaturalist.org/photos/58425561. It was reviewed on 1 July 2022 by INaturalistReviewBot and found to be published under the terms of the Cc-by-4.0 license. Reason: sha1.

Description: Berlin, Naturkundemuseum. Mesolimulus walchi. Date: 27 October 2007, 10:57. Source: Naturkundemuseum. Author: Alexander Hüsing from Berlin, Deutschland.

Description: Italiano: Fossil of Mesolimulus- Took the picture at Museum am Lowentor, Stuttgart. Date: 19 August 2015, 14:28:20. Source: Own work. Author: Ghedoghedo.

Description: English: Fossil invertebrates from Ettling. A, an ammonite (Perisphinctidae indet., JME-ETT568a, from Plattenkalk IV), scale bar in millimeters; B, a juvenile horseshoe crab (Mesolimulus cf. walchi, JME-ETT257a), from Plattenkalk V; C, an unidentified beetle with elytra extended (Coleoptera indet., JME-ETT260, from Plattenkalk V); D, a small crustacean (Pseudastacus sp., JME-ETT38a, from Plattenkalk I). Date: 2015. Source: Ebert M, Kölbl-Ebert M, Lane JA (2015) Fauna and Predator-Prey Relationships of Ettling, an Actinopterygian Fish-Dominated Konservat-Lagerstätte from the Late Jurassic of Southern Germany. PLoS ONE 10(1): e0116140. doi:10.1371/journal.pone.0116140. Author: Martin Ebert, Martina Kölbl-Ebert, Jennifer A. Lane.

Description: English: Figure 9. Species within Pseudoniscus. (A) Pseudoniscus falcatus from the Silurian-aged Patrick Burn Formation, Scotland, UK. NHMUK PI. In. 44122, holotype. (B) Pseudoniscus aculeatus from the Silurian-aged Oesel Group, Saaremaa Island, Estonia. AMNH 029281. (C,D) Pseudoniscus roosevelti from the Silurian-aged Vernon Shale, New York, USA. (C) NMS G.2004.45.5a. (D) NYSM 4762. (E) Pseudoniscus clarkei from the Silurian-aged Vernon Shale, New York, USA. NYSM E1030. (D,E) were photographed under ethanol. Photo credit: (A) Lucie Goodayle, NHM, London; (B,D,E) Russell Bicknell; (C) Bill Crighton. Date: 17 June 2020, 01:45:34. Source: https://www.frontiersin.org/articles/10.3389/feart.2020.00098/full. Author: Russell D. C. Bicknell and Stephen Pates.

Ventral. Catalog no.: ECO-CH-Z. Specimen ID: 7234836. Field no.: YBALHUM050516. Image quality: 1. Aspect ratio: 1.333.

Dorsal. Catalog no.: ECO-CH-Z. Specimen ID: 7234837. Field no.: YBALHUM050516. Image quality: 1. Aspect ratio: 1.333.

Ventral. Catalog no.: ECO-CH-Z. Specimen ID: 7234838. Field no.: YBALHUM050516. Image quality: 1. Aspect ratio: 1.333.

Ventral. Catalog no.: ECO-CH-Z. Specimen ID: 7234845. Field no.: YBALHUM050516. Image quality: 1. Aspect ratio: 1.333.

Ventral and Dorsal. Catalog no.: ACRSD 063. Specimen ID: 5773829. Field no.: ACRSD 063. Taxon rep.: Tachypleus. Image quality: 1. Aspect ratio: 1.333.

A giant Horseshoe Crab cruises through the sea grass flats just outside the entrance to one of the feeder creeks that connect Long Key Bight with Zane Grey Creek.I got to stick with this particular creature for a few minutes; it was a bit of a challenge to avoid the exhaust plume it stirred up, and I couldn't figure out if it knew I was there, and was changing course, or had some grand plan I was oblivious to.Long Key BightLong Key, Monroe County Florida, USASeaLife DC1400Sea Dragon 2000 Photo/Video/Dive Light

There's bound to be some bumps in life's road, but this trendsetter takes them on one obstacle at a time.Atlantic Horseshoe CrabLimulus polyphemusWahoo KeyNational Key Deer Wildlife RefugeMonore County, Florida USAOlympus OM-D E-M5 Mark IIOlympus 14-42mm II R LensPT-EP13 Underwater Housing, PPZR-EP02 Lens Port & 14-42mm Zoom Gear30 September 2019

Orleans, Massachusetts, United States

Edgewater, Florida, United States

Whatever this guy has got on his agenda, you can tell he isn't wasting any time.It's really moving across the bottom at break-neck speeds.Probably just watched "Yes Man."Atlantic Horseshoe CrabLimulus polyphemusWahoo KeyNational Key Deer Wildlife RefugeMonore County, Florida USAOlympus OM-D E-M5 Mark IIOlympus 14-42mm II R LensPT-EP13 Underwater Housing, PPZR-EP02 Lens Port & 14-42mm Zoom Gear30 September 2019 1stPix on iNaturalist

Celestn, Yucatn, Mexico

Brunswick, Maine

After 445 million years, you would think they might have developed a little wing or a fin to help them get around.This one certainly has coming and going like the wind down pat.Atlantic Horseshoe CrabLimulus polyphemusWahoo KeyNational Key Deer Wildlife RefugeMonore County, Florida USAOlympus OM-D E-M5 Mark IIOlympus 14-42mm II R LensPT-EP13 Underwater Housing, PPZR-EP02 Lens Port & 14-42mm Zoom Gear30 September 2019

Brunswick, Maine

Maryland, United States

A master of subterfuge, this arthropod comes and goes like the wind.Atlantic Horseshoe CrabLimulus polyphemusWahoo KeyNational Key Deer Wildlife RefugeMonore County, Florida USAOlympus OM-D E-M5 Mark IIOlympus 14-42mm II R LensPT-EP13 Underwater Housing, PPZR-EP02 Lens Port & 14-42mm Zoom Gear30 September 2019

A king tide, high winds, and generally rough weather made for a challenging day prowling the mangroves on the outskirts of the Horseshoe Quarry.Sooner or later, if you have the patience and look hard enough, you'll come across something interesting.This pair of Horseshoe Crabs found sufficient shelter and just enough room to get down to business.Atlantic Horseshoe CrabLimulus polyphemusScout Key Monroe County Florida, USAOlympus OM-D E-M5 Mark IIOlympus 14-42mm II R LensPT-EP13 Underwater Housing, PPZR-EP02 Lens Port & 14-42mm Zoom Gear22 September 2019

Not much to do on such a dark and stormy day. Atlantic Horseshoe CrabLimulus polyphemusScout Key Monroe County Florida, USAOlympus OM-D E-M5 Mark IIOlympus 14-42mm II R LensPT-EP13 Underwater Housing, PPZR-EP02 Lens Port & 14-42mm Zoom Gear22 September 2019#1stPixScoutKeyPhil's 1stPix Instagram Phil's 1stpix InstagramPhil's 1stPix on iNaturalist-Observation Map iNaturalist: ObservationsPhil's 1stPix on iNaturalist- Species Grid iNaturalist: Species