Top Tweets for #crypticdiversity

4 months ago

📚Issue Released-Volume 17, Issue 5 Cover Story: "Towards a Complete DNA Barcode Library of Austrian Lepidoptera" 👉Open Access: https://t.co/1Vh4c4Bhg1 Please see the whole Issue at: https://t.co/QSkQB6c4X9 #mdpiinsects #Lepidoptera #DNABarcode #crypticdiversity #faunistics

Insects_MDPI's tweet photo. 📚Issue Released-Volume 17, Issue 5

Cover Story: "Towards a Complete DNA Barcode Library of Austrian Lepidoptera"
👉Open Access: https://t.co/1Vh4c4Bhg1

Please see the whole Issue at: https://t.co/QSkQB6c4X9

#mdpiinsects #Lepidoptera #DNABarcode #crypticdiversity #faunistics https://t.co/m0Chxx4DH8

Stefan F. Wirth

@wirthstef

over 1 year ago

On the #biology and #distribution of Amblypygi, on the #crypticdiversity in #Damon #variegatus and other #species. #Whipspiders (#Amblypygi) live worldwide, mostly in subtropical and #tropical areas, where they generally prefer #habitats with higher moisture content. Amblypygi are morphologically adapted to seek refuge in cracks, crevices, or under tree bark. Their very flat body and their ability to move both sideways and forwards help them reach their hiding places and there even move around. Whip spiders are nocturnal and therefore hide during the day. They hunt other arthropods, provided they are large enough to be overpowered. Amblypygi, which together with whip scorpions form the monophyletic clade #Pedipalpi, have #evolved their #pedipalps into a prey-capturing organ. The distal pedipalp section is folded against the proximal area. Additionally, the pedipalps are armed with spines and tooth-like cuticular projections. If we want to compare it to human behavior, the prey is thus "seized" in a "headlock." Due to the morphological modification of the pedipalps, they are no longer well-suited as tactile organs. A further series of evolutionary modifications has led to the evolution of the first walking #leg into a greatly elongated #tactileorgan. Contrary to the typical locomotion of arachnids, Amblypygi #walk on three pairs of legs instead of four. The first pair of legs, which has been modified to function as a sensory leg, is no longer able to stabilize the body due to its elongation and delicate, flagella-like structure. Similar to the pedipalps of other members of the Achachnida, the #firstpair of #legs, is used to explore the environment with the help of sensory organs located on its surface. These organs are mainly chemosensors and organs that can detect air movements and bending of the chitin skeleton (chemo- and mechano-#sensors). Whipspiders do, unlike whip scorpions, not posses any poisons or defensive chemicals. Amblypygi are therefore harmless to humans. My recent photos show a dried #specimen of the species Damon variegatus, which I kept in a terrarium for years and which died around 2014. My 2010 video recordings of the animal during its lifetime with a conspecific are linked under References. The species Damon variegatus is of #biological interest, because it belongs to a monophyletic #cryptic #speciesgroup. Cryptic species are characterized by the fact that they are at first difficult to distinguish from one another, but can be defined as different species by obtaining additional characters. The authors L. Prendini, P. Weygoldt & W. C. Wheeler (2005) comparatively studied populations assigned to D. variegatus with regard to #matingbehavior and spermarophore #morphology. In addition, #moleculargenetic data were collected, namely DNA sequences from loci of three genes in the nuclear genome (18S rDNA, 28S rDNA and Histone H3) and three genes in the mitochondrial genome (12S rDNA, 16S rDNA and Cytochrome Oxidase I). Only the genetic evidence differentiated populations from the west of the Kalahari sand system from those from the east. The authors described the new species thus discovered as Damon #sylviae. The widespread nature of cryptic diversity within nominal species in the #Arachnida is mentioned in the paper by F. Reveillion et al. (2020), who point to cryptic complexes in scorpions and Araneae, but in their own work studied species of Amblypygi, namely the three morphospecies Heterophrynus alces, H. batesii, and H. longicornis. The authors identified cryptic diversity within these nominal species based on molecular data, namely using cytochrome oxidase 1 (COI). © #StefanFWirth Berlin 2025 Recerences: Lorenzo Prendini et al. (2005). https://t.co/skZS3xTXKQ Florian Reveillion, er al. (2020). https://t.co/dqORRrK79v Video S. F. Wirth (2010): https://t.co/7xHkZhx76i Photos: Damon variegatus, © S. F. Wirth Berlin, 2025

wirthstef's tweet photo. On the #biology and #distribution of Amblypygi, on the #crypticdiversity in #Damon #variegatus and other #species.

#Whipspiders (#Amblypygi) live worldwide, mostly in subtropical and #tropical areas, where they generally prefer #habitats with higher moisture content. Amblypygi are morphologically adapted to seek refuge in cracks, crevices, or under tree bark. Their very flat body and their ability to move both sideways and forwards help them reach their hiding places and there even move around. Whip spiders are nocturnal and therefore hide during the day. They hunt other arthropods, provided they are large enough to be overpowered.

Amblypygi, which together with whip scorpions form the monophyletic clade #Pedipalpi, have #evolved their #pedipalps into a prey-capturing organ. The distal pedipalp section is folded against the proximal area. Additionally, the pedipalps are armed with spines and tooth-like cuticular projections. If we want to compare it to human behavior, the prey is thus "seized" in a "headlock." Due to the morphological modification of the pedipalps, they are no longer well-suited as tactile organs. A further series of evolutionary modifications has led to the evolution of the first walking #leg into a greatly elongated #tactileorgan.

Contrary to the typical locomotion of arachnids, Amblypygi #walk on three pairs of legs instead of four. The first pair of legs, which has been modified to function as a sensory leg, is no longer able to stabilize the body due to its elongation and delicate, flagella-like structure. Similar to the pedipalps of other members of the Achachnida, the #firstpair of #legs, is used to explore the environment with the help of sensory organs located on its surface. These organs are mainly chemosensors and organs that can detect air movements and bending of the chitin skeleton (chemo- and mechano-#sensors). Whipspiders do, unlike whip scorpions, not posses any poisons or defensive chemicals. Amblypygi are therefore harmless to humans.

My recent photos show a dried #specimen of the species Damon variegatus, which I kept in a terrarium for years and which died around 2014. My 2010 video recordings of the animal during its lifetime with a conspecific are linked under References.

The species Damon variegatus is of #biological interest, because it belongs to a monophyletic #cryptic #speciesgroup. Cryptic species are characterized by the fact that they are at first difficult to distinguish from one another, but can be defined as different species by obtaining additional characters. The authors L. Prendini, P. Weygoldt & W. C. Wheeler (2005) comparatively studied populations assigned to D. variegatus with regard to #matingbehavior and spermarophore #morphology.
In addition, #moleculargenetic data were collected, namely DNA sequences from loci of three genes in the nuclear genome (18S rDNA, 28S rDNA and Histone H3) and three genes in the mitochondrial genome (12S rDNA, 16S rDNA and Cytochrome Oxidase I). Only the genetic evidence differentiated populations from the west of the Kalahari sand system from those from the east. The authors described the new species thus discovered as Damon #sylviae.

The widespread nature of cryptic diversity within nominal species in the #Arachnida is mentioned in the paper by F. Reveillion et al. (2020), who point to cryptic complexes in scorpions and Araneae, but in their own work studied species of Amblypygi, namely the three morphospecies Heterophrynus alces, H. batesii, and H. longicornis. The authors identified cryptic diversity within these nominal species based on molecular data, namely using cytochrome oxidase 1 (COI).

© #StefanFWirth Berlin 2025

Recerences:

Lorenzo Prendini et al. (2005). https://t.co/skZS3xTXKQ

Florian Reveillion, er al. (2020). https://t.co/dqORRrK79v

Video S. F. Wirth (2010):
https://t.co/7xHkZhx76i

Photos:

Damon variegatus, © S. F. Wirth Berlin, 2025

211

eleni gentekaki @CiliateGal

about 3 years ago

This morning we get to hear @Eukaryotes, the pioneer of the #blastocystis subtyping system, discussing exactly this. #protist #gut #crypticdiversity #costactions @BlastocystisC .

BlastocystisCOST @BlastocystisC

about 3 years ago

@Eukaryotes discussing subtyping and genetic diversity of #blastocystis #protist #gut #onehealth #Training #scicomm #CostActions @cost

BlastocystisC's tweet photo. @Eukaryotes discussing subtyping and genetic diversity of #blastocystis #protist #gut #onehealth #Training #scicomm #CostActions @cost https://t.co/msSWWwmJ5k

406

Bats without Borders @bats_w_borders

about 4 years ago

Talk 8 - @Opoku_Bmark giving us an overview of his MSc #bat #research #crypticdiversity #Africanbats #AfriPopo2022 #Ghana #acoustic and #morphometric #variation #molecularanalysis

bats_w_borders's tweet photo. Talk 8 - @Opoku_Bmark giving us an overview of his MSc #bat #research #crypticdiversity #Africanbats #AfriPopo2022 #Ghana #acoustic and #morphometric #variation #molecularanalysis https://t.co/h8NZy4Ifcm

Jez Roff @JezRoff

almost 6 years ago

When a "common" coral reef macroalgae isn't actually all that common: a new study from #Palau led by @LauraPuk published in @Mar_Biology reveals high levels of #crypticdiversity in Lobophora, including 8 undescribed species (1/n)

JezRoff's tweet photo. When a "common" coral reef macroalgae isn't actually all that common: a new study from #Palau led by @LauraPuk published in @Mar_Biology reveals high levels of #crypticdiversity in Lobophora, including 8 undescribed species (1/n) https://t.co/hXJlu1ikj6

evolvingseas @evolvingseas

about 6 years ago

.@TheDavidLab studies #InvasiveSpecies #GeneticConnectivity & #Dispersal to understand how human activities modify #EvolutionaryPotential. David&Cahill examined #polychaete genetic structure, finding #CrypticDiversity & role of anthropogenic introductions. https://t.co/YYvfa8F7LN

Mycological Society of America moved to bluesky @MSAFungi

over 6 years ago

rDNA sequences were generated of the type of #Cortinarius porphyroideus, leading to the recognition of this species being rare and the description of 4 morphological similarity but phylogenetically distinct #NewSpecies. https://t.co/31unfDxk8d #crypticdiversity 🍄🇳🇿

MSAFungi's tweet photo. rDNA sequences were generated of the type of #Cortinarius porphyroideus, leading to the recognition of this species being rare and the description of 4 morphological similarity but phylogenetically distinct #NewSpecies. https://t.co/31unfDxk8d #crypticdiversity 🍄🇳🇿 https://t.co/QukCeuA9oZ

GC CUNY Biology @GradCenterBio

over 6 years ago

@GradCenterBio #faculty Prof.Carnaval @ana_bosslady @CityCollegeNY talked about what is hidden in the #DNA of this lizard Loxopholis osvaldoi https://t.co/DGvfuiSCkF #life in #amazon #crypticdiversity

Prof. Dr. Felipe Ribeiro🦞🏳️‍🌈 @craylipe

about 7 years ago

The beautiful and burrowing #crayfish Parastacus defossus Faxon, 1898. #postdoc #crypticdiversity #systematics #job

Dr Beulah Garner @thiswordistaken

about 7 years ago

You can’t have a bunch of systematic biologists in a room without someone talking about genitalia #crypticdiversity #SABiennial2019

thiswordistaken's tweet photo. You can’t have a bunch of systematic biologists in a room without someone talking about genitalia #crypticdiversity #SABiennial2019 https://t.co/rvUwv7cPSE

Anna-Maria Vafeiadou @AVafeiadou

almost 8 years ago

Living apart-together: Cohabitation, sharing and caring, it's all new for our little worm fellows! Our latest work just published. #PLOSONE: https://t.co/TQW9s0T6H2 @SofieDerycke #nematodes #meiofauna #benthos #crypticdiversity #marineecology

Christopher Mah, @echinoblog.bsky.social @echinoblog

about 11 years ago

Unassuming octocoral found to be new genus & species! #crypticdiversity from @InvertebratesDC http://t.co/6Vckt1K39L

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