Archivos de diario de agosto 2019

14 de agosto de 2019

Marine Reef Shrimp ID Resources

🔹 Reef Creature Identification: Tropical Pacific, by Paul Humann and Ned DeLoach, from New World Books available online in print and eBook.

🔹 Banded coral shrimp/boxer shrimp:
https://reefbuilders.com/2015/04/15/photographic-identification-guide-stenopus-shrimp/

🔹 Vir commensal shrimp:
http://www.starfish.ch/c-invertebrates/commensal-shrimps.html#Vir

🔹 More shrimp:
http://www.starfish.ch/index.html

🔹 Vir cleaner shrimp:

  • V philippinensis vs V. smiti, courtesy of @franca2020 in this observation https://www.inaturalist.org/observations/57581431:

    They told me (in Romblon) that it is the newly described Vir smitti. I think mostly because of the dark red instead of purple. I will add some differences in colour to V. philippinensis from a paper: https://www.semanticscholar.org/paper/Vir-smiti-spec.-nov.%2C-a-new-scleractinian-shrimp-Fransen-Holthuis/06851af41dd72b62b62fd92ecfc715f33b8b1eb5
    After reading these, I am not sure it is V. smiti because I can't see the two first pereiopods being completely transparent!
    from the paper:
    Differences in colouration between V. smiti and V. philippinensis:
    • Antennular flagella red-brown in V. smiti; basally purple-blue and distally red in V.
    philippinensis.
    • With yellow chromatophores between eyes and anterior appendages in V. smiti;
    without yellow chromatophores in V. philippinensis.
    • First two pereiopods completely transparent in V. smiti; with purple-blue longitudinal thin line in V. philippinensis.
    • Third to fifth pereiopods with red-brown thin longitudinal lines in V. smiti; with
    purple-blue lines in V. philippinensis.
    • Uropods transparent in V. smiti; lateral margin of exopod of uropods with purpleblue line in V. philippinensis.

  • Vir colemani has spots/narrow bands instead of lengthwise lines.

🍤 How I identify a specific goby shrimp that's not in the Humann & DeLoach book

Fine-striped Snapping Shrimp, Alpheus ochrostriatus
It's more clear when you can see the two white saddles farther down the shrimp's body. But the fine beige lines down a pale body (or vice versa) with yellowish legs is how I ID them.

Here is an example from a site with (I think) a good ID track record:
http://www.starfish.ch/Fotos/crustaceans-Gliederfuesser/shrimps-Garnelen/Alpheus-ochrostriatus9.jpg

It also seems to be used in the aquarium trade:
http://www.saltcorner.com/AquariumLibrary/browsespecies.php?CritterID=2602

If I'm wrong, I'll have to go back and correct a bunch of IDs.

There's a Red Sea shrimp that has the 2 white saddles but it's not in any way yellow in any pictures I've seen, has dark antennae & a fat dark crescent under its front leg, and has dark bands in addition to the saddles. It's the Djedda Snapping Shrimp, Alpheus djeddensis.

I explained it in this observation:
https://www.inaturalist.org/observations/8494511

Eggshell-style shrimp (Hamopontonia sp.): From @aractwin: "H. fungicola is the one with two large white patches; H. corallicola has many smaller white spots"

Publicado el agosto 14, 2019 02:47 MAÑANA por jbecky jbecky | 0 comentarios | Deja un comentario

19 de agosto de 2019

Nudibranch & Sea Slug ID Resources

🐌 Nudibranchs and Sea Slugs Identification: Indo-Pacific book, Vol 2, by Gosliner, Valdés, and Behrens (available in print and online from New World Publications)

🐌 Reef Creature Identification 3rd EDITION: Florida Caribbean Bahamas, by Paul Humann, Ned DeLoach and Les Wilk (available in print and online from New World Publications)

🐌 Nudibranch Behavior, by Behrens (available in print and online from New World Publications)

🐌 The now reference-only Sea Slug Forum (http://www.seaslugforum.net)

🐌 Sea Slug World: https://en.seaslug.world/
🐌 Sea Slugs of Hawaii: http://seaslugsofhawaii.com

🐌 http://fijireeffish.com (user iNat maractwin's site about the marine critters of Fiji)

🐌 An article I want to read behind a $50 paywall:
Title: Reading between the lines: revealing cryptic species diversity and colour patterns in Hypselodoris nudibranchs (Mollusca: Heterobranchia: Chromodorididae)
Abstract:
A molecular phylogeny is presented for 48 species of the genus Hypselodoris (Family: Chromodorididae), which incorporated 64 newly sequenced specimens. Hypselodoris is monophyletic and divided into clades that exhibit varying support. Novel diversity was found, with the distinctness of 17 new species of Hypselodoris supported by the molecular phylogeny, subsequent species delimitation analysis and morphological data. The following species are described here: Hypselodoris alburtuqali Gosliner & Johnson sp. nov., Hypselodoris brycei Gosliner & Johnson sp. nov., Hypselodoris cerisae Gosliner & Johnson sp. nov., Hypselodoris confetti Gosliner & Johnson sp. nov., Hypselodoris iba Gosliner & Johnson sp. nov., Hypselodoris juniperae Gosliner & Johnson sp. nov., Hypselodoris katherinae Gosliner & Johnson sp. nov., Hypselodoris lacuna Gosliner & Johnson sp. nov., Hypselodoris melanesica Gosliner & Johnson sp. nov., Hypselodoris paradisa Gosliner & Johnson sp. nov., Hypselodoris perii Gosliner & Johnson sp. nov., Hypselodoris roo Gosliner & Johnson sp. nov., Hypselodoris rositoi Gosliner & Johnson sp. nov., Hypselodoris skyleri Gosliner & Johnson sp. nov., Hypselodoris variobranchia Gosliner & Johnson sp. nov., Hypselodoris violacea Gosliner & Johnson sp. nov. and Hypselodoris yarae Gosliner & Johnson sp. nov. Further examination of colour patterns supports previous suggestions that inheritance of colour patterns from common ancestors occurs, as do convergences, driven by Müllerian mimicry.

Publicado el agosto 19, 2019 04:55 MAÑANA por jbecky jbecky | 0 comentarios | Deja un comentario