[Botany • 2021] Ceropegia longirostris (Apocynaceae: Asclepiadoideae) • A New Species from Ethiopia and Kenya

 Ceropegia longirostris Thulin, M.G.Gilbert & Kaariye

in Thulin, Gilbert & Kaariye, 2021. 

DOI: 10.1111/njb.03416

Abstract

The new species Ceropegia longirostris Thulin, M.G.Gilbert & Kaariye is described, illustrated and mapped. It is known from two localities, one on gypsum in the Somali National Regional State (Ogaden) in southeastern Ethiopia and one, based on a photographic record, from just east of Lake Turkana in northwestern Kenya. The new species is a member of C. sect. Phalaena H.Huber, and is distinctive by having flowers with the corolla glabrous outside and apically with a long narrowly clavate beak abruptly delimited from the rest of the corolla, and with each lobe of the corolla having a prominent wart-like blackish projection near the tip on the inside.

Keywords: Apocynaceae, Ceropegia sect. Phalaena, Ethiopia, gypsum, Kenya, taxonomy

Ceropegia longirostris Thulin, M.G.Gilbert & Kaariye sp. nov. at type locality
(A) flower with beak of corolla bent at the base and curved, (B) flower with beak upright and straight, (C) detail of flower showing blackish wart-like projections on inside of corolla lobes and abruptly delimited beak.

Photographs by Hassan Y. Kaariye.

 Ceropegia longirostris Thulin, M.G.Gilbert & Kaariye sp. nov. from the locality in Kenya.
 (A) flower, (B) fruit.

 Photographs by Francis H. Brown.

Ceropegia longirostris Thulin, M.G.Gilbert & Kaariye

A species that differs from Ceropegia somalensis Chiov. by having a corolla that is glabrous outside (versus shortly and densely pubescent all over the outer surface), 7–8 mm (versus 12–16 mm) wide at the mouth, with wart-like projections ca 1.3 mm long on the inside of the corolla lobes below their point of fusion (versus sometimes having smaller or rudimentary knobs), the lobe margins recurved and auriculate at the sinus (versus flat), and with the tips of the corolla lobes twisted together or closely cohering to form a narrowly clavate, 16–20 mm long beak that is abruptly delimited from the rest of the corolla and sometimes more or less geniculate at the base (versus a beak more gradually delimited and loosely twisted above to form a secondary upper ‘cage' or occasionally uppermost part of corolla lobes absent).

Distribution and habitat: 

Ceropegia longirostris is known from only two localities, one in Ethiopia and one in Kenya (Fig. 4) and some 900 km apart. The type locality in Ethiopia is situated east of Kebri Dehar in the Somali National Regional State (previously Harerge Region) in an area called Ceelxaar. The species is found in a small gypsum outcrop surrounded by silty or sandy ground, in a vegetation of open Senegalia–Vachellia–Commiphora bushland at an elevation of 500–550 m a.s.l. The locality is also the type locality of C. gypsophila Thulin (2009) and Commicarpus ogadenensis Thulin (2021), and other more or less local gypsum endemics found there are Kleinia gypsophila Lebrun & Stork and Euphorbia suborbicularis Thulin.

The locality in Kenya, Ileret just east of Lake Turkana, is situated within the Sibiloi National Park. This is an UNESCO World Heritage Site since 1997, famous for its important archaeological sites, such as Koobi Fora, with rich findings of fossils of early hominids. We have no direct information on the habitat of the Kenyan locality of Ceropegia longirostris, but presumably it is open bushland on gypseous ground at ca 400 m a.s.l. It is very likely that further populations of the species exist and it should be searched for in other areas of gypsum at similar elevations in southern Ethiopia and northern Kenya.

 

Mats Thulin, Michael G. Gilbert and Hassan Y. Kaariye. 2021. Ceropegia longirostris sp. nov. (Apocynaceae–Asclepiadoideae) from Ethiopia and Kenya. Nordic Journal of Botany. DOI: 10.1111/njb.03416

[Ornithology • 2022] Population Connectivity Across A highly Fragmented Distribution: Phylogeography of the Chalcophaps Doves (Aves, Columbidae)

Phylogeography of the Chalcophaps Doves

in DeRaad, Manthey, Ostrow, ... et Moyle, 2021.

DOI: 10.1016/j.ympev.2021.107333 

Highlights: 

• Phylogenetic reconstruction supports current taxonomy.

• Discordant nuclear and mitochondrial ancestry near contact zone.

• Isolation by distance and hierarchical population structure within clades.

• Low overall diversity despite a large and fragmented geographic distribution.

Abstract

Chalcophaps is a morphologically conserved genus of ground-walking doves distributed from India to mainland China, south to Australia, and across the western Pacific to Vanuatu. Here, we reconstruct the evolutionary history of this genus using DNA sequence data from two nuclear genes and one mitochondrial gene, sampled from throughout the geographic range of Chalcophaps. We find support for three major evolutionary lineages in our phylogenetic reconstruction, each corresponding to the three currently recognized Chalcophaps species. Despite this general concordance, we identify discordant mitochondrial and nuclear ancestries in the subspecies C. longirostris timorensis, raising further questions about the evolutionary history of this Timor endemic population. Within each of the three species, we find evidence for isolation by distance or hierarchical population structure, indicating an important role for geography in the diversification of this genus. Despite being distributed broadly across a highly fragmented geographic region known as a hotspot for avian diversification, the Chalcophaps doves show modest levels of phenotypic and genetic diversity, a pattern potentially explained by strong population connectivity owing to high overwater dispersal capability.

  

 Keywords: Phylogeography, Evolution, Isolation by distance, Mitonuclear discordance, Phylogenetics, Chalcophaps

    

 

 Devon A. DeRaad, Joseph D. Manthey, Emily N. Ostrow, Lucas H. DeCicco, Michael J. Andersen, Peter A. Hosner, Hannah T. Shult, Leo Joseph, John P. Dumbacher and Robert G.. Moyle. 2021. Population Connectivity Across A highly Fragmented Distribution: Phylogeography of the Chalcophaps Doves.  Molecular Phylogenetics and Evolution. 166; 107333. DOI: 10.1016/j.ympev.2021.107333 

Emerald Dove

[Botany • 2021] Dendrobium gopalanii (Orchidaceae: Epidendroideae) • A New Species from Kerala, Western Ghats, India

Dendrobium gopalanii M.Sulaiman & Murugan, 

in Sulaiman  & Murugan, 2021. 

  taiwania.NTU.edu.tw

Abstract

Dendrobium gopalanii (Orchidaceae), a new lithophytic species from Agasthyarkoodam in the Western Ghats of Kerala (India), is described and photographed. It differs from similar species of Dendrobium heyneanum Lindl., D. panduratum Lindl., D. panduratum subsp. villosum Gopalan & A.N.Henry and D. wightii A.D.Hawkes and A.H.Heller have a cylindrical stem, leathery leaves, obliquely acute apex, 1–4 flowers, sepals and petals apex obtuse, minutely crenulate margin of petals, lip midlobe orbicular, margin undulated, retuse apex with minutely mucronated in middle, bilobed callus of disc, and obtuse apex.

Keyword: Agasthyamala, D. heyneanum, Dendrobium panduratum, D. wightii, orbicular lip, Stachyobium

Dendrobium gopalanii M.Sulaiman & Murugan sp. nov.
A. Habit; B. Natural Habitat; C. Flower; D. Dorsal sepal; E. Lateral sepal; F. Petal; G. Lip (ventral view); H. Lip (dorsal view); I. Lip (spread out); J. Column (dorsal view); K. Stigma; L. Column with mentum; M. Peduncle with bract; N. Anther; O. Pollinia.

Dendrobium gopalanii M.Sulaiman & Murugan, sp. nov.

Diagnosis: Dendrobium gopalanii is similar to D. heyneanum Lindl., D. panduratum Lindl., D. panduratum subsp. villosum Gopalan & A.N.Henry and D. wightii A.D.Hawkes & A.H.Heller, but differs in the presence of a cylindrical stem; leathery leaves with an obliquely acute at apex; flowers small, 1–4 flowers, sepals and petals apex obtuse, margin of the petals minutely crenulate at apical part; midlobe of the lip orbicular, undulate, retuse at apex with minutely mucronated in middle; callus of disc bi-lobed and apex obtuse. (Table 1)

 The morphological differences of flower.
A. Dendrobium gopalanii M.Sulaiman & Murugan; B. D. heyneanum; C. D. panduratum subsp. panduratum; D. D. panduratum subsp. villosum; E. D. wightii.

Habitat: The lithophytic orchid mostly grows along the moist dripping rocks of mixed evergreen forests of Agasthyarkoodam, Thiruvananthapuram at about 1,601 meter elevation.

Distribution: The species has so far only been found at its type locality (Fig. 3). 

Etymology: The specific epithet is named after Dr. R. Gopalan, Scientist-C (Rtd.), Botanical Survey of India, Coimbatore, for his noteworthy contribution to Indian Botany, in particular the Flora of Agasthyamalai.

M. Sulaiman and Chidambaram Murugan. 2021. Dendrobium gopalanii (Orchidaceae): A New Species from Kerala, Western Ghats, India. Taiwania. 66(4); 557-560. DOI: 10.6165/tai.2021.66.557

  taiwania.NTU.edu.tw/abstract.php?type=abstract&id=1792

  facebook.com/TaiwaniaOffice/posts/2978228012399008

   

[Mollusca • 2022] Global Diversification and Evolutionary History of Onchidiid Slugs (Gastropoda, Pulmonata: Onchidiidae)

Onchidella (Hoffmannola) hansi (Ev. Marcus and Er. Marcus, 1967), Sinaloa, Mexico,

photo by Q. Y. Abadia-Chanona and O. H. Avila-Poveda;  

 Peronina tenera (Stoliczka, 1869), Pulau Burung, Malaysia; 
Onchidium typhae Buchannan, 1800, Andaman Islands, India; 

Marmaronchis vaigiensis (Quoy & Gaimard, 1825), Gilimanuk, Bali, Indonesia;
 Platevindex coriaceus (Semper, 1880),  Mabini, Bohol, Philippines;
 Semperoncis cf. montana (Plate, 1893), Mt. Palali, Luzon, Philippines, at around 1400 m altitude,

photo by R. Lücking; 

Laspionchis boucheti Dayrat & Goulding, 2019, 39 mm long, Can Gio, Vietnam; 
Paromoionchis tumidus (Semper, 1880), Calatagan, Batangas, Philippines; 
Wallaconchis sinanui Goulding & Dayrat, 2018, Lateri, Ambon, Indonesia; 

Melayonchis eloisae Dayrat, 2017, Pasir Park, Singapore; 
Alionchis jailoloensis Goulding & Dayrat 2018,  Kao, Halmahera, Indonesia; 
Peronia peronii (Cuvier, 1804), Mahebourg waterfront, Mauritius.

in Goulding, Khalil, Tan, et al., 2022.

 DOI: 10.1016/j.ympev.2021.107360

 twitter.com/TCGoulding 

Highlights: 

• A global molecular phylogeny of onchidiid slugs is reconstructed.

• The common ancestor of onchidiid slugs likely lived in the rocky intertidal.

• Onchidiids transitioned into new habitats in mangrove forests during the Miocene.

• Diversification is the result of allopatric and sympatric (ecological) speciation.

Abstract

Many marine species are specialized to specific parts of a habitat. In a mangrove forest, for instance, species may be restricted to the mud surface, the roots and trunks of mangrove trees, or rotting logs, which can be regarded as distinct microhabitats. Shifts to new microhabitats may be an important driver of sympatric speciation. However, the evolutionary history of these shifts is still poorly understood in most groups of marine organisms, because it requires a well-supported phylogeny with relatively complete taxon sampling. Onchidiid slugs are an ideal case study for the evolutionary history of habitat and microhabitat shifts because onchidiid species are specialized to different tidal zones and microhabitats in mangrove forests and rocky shores, and the taxonomy of the family in the Indo-West Pacific has been recently revised in a series of monographs. Here, DNA sequences for onchidiid species from the North and East Pacific, the Caribbean, and the Atlantic are used to reconstruct phylogenetic relationships among Onchidella species, and are combined with new data for Indo-West Pacific species to reconstruct a global phylogeny of the family. The phylogenetic relationships of onchidiid slugs are reconstructed based on three mitochondrial markers (COI, 12S, 16S) and three nuclear markers (28S, ITS2, H3) and nearly complete taxon sampling (all 13 genera and 62 of the 67 species). The highly-supported phylogeny presented here suggests that ancestral onchidiids most likely lived in the rocky intertidal, and that a lineage restricted to the tropical Indo-West Pacific colonized new habitats, including mudflats, mangrove forests, and high-elevation rainforests. Many onchidiid species in the Indo-West Pacific diverged during the Miocene, around the same time that a high diversity of mangrove plants appears in the fossil record, while divergence among Onchidella species occurred earlier, likely in the Eocene. It is demonstrated that ecological specialization to microhabitats underlies the divergence between onchidiid genera, as well as the diversification through sympatric speciation in the genera Wallaconchis and Platevindex. The geographic distributions of onchidiid species also indicate that allopatric speciation played a key role in the diversification of several genera, especially Onchidella and Peronia. The evolutionary history of several morphological traits (penial gland, rectal gland, dorsal eyes, intestinal loops) is examined in relation to habitat and microhabitat evolutionary transitions and provides the first evidence that the rectal gland of onchidiids is an adaptation to high intertidal and terrestrial habitats.

Keywords: Biogeography, divergence time, ecological speciation, habitat transition, mangroves, rocky intertidal

Photos from top to bottom are
 Onchidella nigricans (Quoy and Gaimard, 1832), 15 mm long, New South Wales, Australia; Onchidella (Hoffmannola) hansi (Ev. Marcus and Er. Marcus, 1967), 40 mm long, Sinaloa, Mexico, photo by Quetzalli Yasu Abadia-Chanona and Omar Hernando Avila-Poveda;  France;
 Peronina tenera (Stoliczka, 1869), 36 mm long, Pulau Burung, Malaysia; Onchidium typhae Buchannan, 1800, 40 mm long, Andaman Islands, India;

 Melayonchis eloisae Dayrat, 2017, 15 mm long, Pasir Park, Singapore; Marmaronchis vaigiensis (Quoy & Gaimard, 1825), 23 mm long, Gilimanuk, Bali, Indonesia; 
Platevindex coriaceus (Semper, 1880), 37 mm long, Mabini, Bohol, Philippines; Semperoncis cf. montana (Plate, 1893), Mt. Palali, Luzon, Philippines, at around 1400 m altitude, photo by Robert Lücking;

 Onchidina australis (Semper, 1880), 45 mm long, Blackman Park, New South Wales, Australia; Laspionchis boucheti Dayrat & Goulding, 2019, 39 mm long, Can Gio, Vietnam; 
Paromoionchis tumidus (Semper, 1880), 31 mm long, Calatagan, Batangas, Philippines; Wallaconchis sinanui Goulding & Dayrat, 2018, 9 mm long, Lateri, Ambon, Indonesia; 
Alionchis jailoloensis Goulding & Dayrat 2018, 48 mm long, Kao, Halmahera, Indonesia; Peronia peronii (Cuvier, 1804), 110 mm long, Mahebourg waterfront, Mauritius.

Tricia C. Goulding, Munawar Khalil, Shau Hwai Tan, Rebecca A. Cumming and Benoît Dayrat. 2022. Global Diversification and Evolutionary History of Onchidiid Slugs (Gastropoda, Pulmonata). Molecular Phylogenetics and Evolution. In Press, 107360. DOI: 10.1016/j.ympev.2021.107360

 twitter.com/TCGoulding/status/1461816835402190848

   

[Botany • 2021] Allium judaeum (Amaryllidaceae) • A New Species endemic to Israel and the West Bank

Allium judaeum Ben-Natan & Fragman 

in Ben-Natan & Fragman-Sapir, 2021. 

שום יהודה  || DOI: 10.1111/curt.12420

twitter.com/HerbariumHUJ

 FLORA.org.il 

Summary

The genus Allium includes important food plants including onion, garlic, chives, and leeks, as well as cultivars traded widely in the horticultural industry. Yet species limits and diversity in the genus still require further work. The eastern Mediterranean has emerged as a centre of diversity for the genus Allium in recent years. Here we describe a new species, Allium judaeum that is a rare endemic, apparently restricted to the Judean Mountains of Israel and the West Bank, and discuss the ecology and outlook for the plant, and recommendations for its conservation.

    

Allium judaeum Ben-Natan & Fragman sp. nov. 

Type: ISRAEL/PALESTINE. Judean Mountains, Efrat, ..., 900 m, ...

 

Dar Ben-Natan and Ori Fragman-Sapir. 2021. Allium judaeum sp. nov.: Amaryllidaceae. Curtis's Botanical Magazine. DOI: 10.1111/curt.12420

Illustration by Rubin Krief

twitter.com/HerbariumHUJ/status/1453654220889014272

 FLORA.org.il/plants/alljud

[Ichthyology • 2021] Oxynoemacheilus isauricus • A New Nemacheilid Loach (Teleostei: Nemacheilidae) from Central Anatolia

Oxynoemacheilus isauricus

Yoğurtçuoğlu, Kaya, Ozulug & Freyhof, 2021

DOI: 10.11646/zootaxa.4975.2.7

 twitter.com/yokbaran

Abstract

Oxynoemacheilus isauricus, new species, from the Lakes Beyşehir and Suğla basins in Central Anatolia is distinguished from all other species of the O. angorae group by having a very slender caudal peduncle (its depth 2.2–2.6 times in its length). The new species is further distinguished by having a short head (head length 21–24% SL), and a midlateral series of irregularly shaped blotches on the flank. Oxynoemacheilus isauricus is also distinguished by a minimum K2P sequence divergence of 7.5% and 8.0% in the mtDNA-COI barcode region from O. eregliensis and O. atili, its closest relatives.

Keywords: Pisces, Cytochrome oxidase I, Freshwater fish, Lake Beyşehir, Middle East, Taxonomy 

 

 

Baran Yoğurtçuoğlu, Cüneyt Kaya, Müfit Ozulug and Jörg Freyhof. 2021. Oxynoemacheilus isauricus, A New Nemacheilid Loach from Central Anatolia (Teleostei: Nemacheilidae).  Zootaxa. 4975(2); 369–378. DOI: 10.11646/zootaxa.4975.2.7

Researchgate.net/publication/351825529_Oxynoemacheilus_isauricus_a_new_nemacheilid_loach_from_Central_Anatolia

 twitter.com/yokbaran/status/1397098300898217985

[Ichthyology • 2021] Speciation Dynamics and Extent of Parallel Evolution along A Lake-Stream Environmental Contrast in African Cichlid Fishes

Astatotilapia burtoni, Haplochromis stappersii,
Ctenochromis horei, and Pseudocrenilabrus philander

in Weber, Rajkov, ... et Salzburger, 2021 

DOI: 10.1126/sciadv.abg5391 

 twitter.com/WSalzburger 

Artwork by    twitter.com/jehimes

Abstract

Understanding the dynamics of speciation is a central topic in evolutionary biology. Here, we investigated how morphological and genomic differentiation accumulated along the speciation continuum in the African cichlid fish Astatotilapia burtoni. While morphological differentiation was continuously distributed across different lake-stream population pairs, we found that there were two categories with respect to genomic differentiation, suggesting a “gray zone” of speciation at ~0.1% net nucleotide divergence. Genomic differentiation was increased in the presence of divergent selection and drift compared to drift alone. The quantification of phenotypic and genetic parallelism in four cichlid species occurring along a lake-stream environmental contrast revealed parallel and antiparallel components in rapid adaptive divergence, and morphological convergence in species replicates inhabiting the same environments. Furthermore, we show that the extent of parallelism was higher when ancestral populations were more similar. Our study highlights the complementary roles of divergent selection and drift on speciation and parallel evolution.

The study system comprising nine lake-stream population pairs in four cichlid fish species from African Lake Tanganyika and surroundings.
(A) Illustrations of the four species used in this study and a schematic representation of their phylogenetic relationships.
(B) Map of sampling localities and names of the different lake-stream population pairs, that is, systems. Astatotilapia burtoni, Ctenochromis horei, Haplochromis stappersii, and Pseudocrenilabrus philander.

    

CONCLUSION: 

By examining the dynamics of differentiation in the African cichlid A. burtoni, we found that morphological differentiation was continuous along the speciation continuum. Contrastingly, we detected a gap in genomic differentiation that was only partially explained by geographic patterns. Our results, therefore, provide additional support for the hypothesis that there is a tipping point in genomic differentiation during the speciation process (5), suggesting that there might be a threshold of genomic differentiation to delimit species. We further showed that genomic differentiation was accelerated in the presence of both divergent selection and genetic drift, highlighting the combined effect of selective and neutral processes in speciation.

To gain insights into the potential predictability of the speciation process, we investigated the extent of parallel evolution in nine population pairs from four cichlid species that diverged along a similar lake-stream environmental contrast. While pairwise comparisons failed to identify strong signatures of phenotypic and genomic parallelism, multivariate analyses uncovered major axes of shared evolutionary changes along the lake-stream contrast. Last, we found that levels of parallelism were higher between closely related and, hence, genetically more similar population pairs. While the speciation process is overall difficult to predict, our results support the view that evolution can be predictable to a certain extent if appropriate models and data are used (56). To conclude, our study corroborates that contingency plays an important role in speciation and that speciation is a complex product of differentiation trajectories through multivariate space and time.

Alexandra A.-T. Weber, Jelena Rajkov, Kolja Smailus, Bernd Egger and Walter Salzburger. 2021 Speciation Dynamics and Extent of Parallel Evolution along A Lake-Stream Environmental Contrast in African Cichlid Fishes. SCIENCE ADVANCES. 7: 45. DOI: 10.1126/sciadv.abg5391

  twitter.com/WSalzburger/status/1456190934257917952

   twitter.com/jehimes/status/1456038575984689152

[Botany • 2021] Ardisia kalimbahin (Primulaceae: Myrsinoideae) • A New Species from the Philippines

Ardisia kalimbahin  Magtoto

in Magtoto, Tamayo, Udasco & Bustamante, 2021. 

DOI: 10.11646/phytotaxa.525.4.4

 facebook.com/phtaxa 

Abstract

Ardisia kalimbahin is herein described and illustrated as a new species. It is the latest addition to the richness of Ardisia in the Philippines. It closely resembles A. romanii Elmer but is distinct in having shorter petiole, shorter elliptic leaves, racemose inflorescence, longer and sparsely puberulent pedicels, magenta corolla lobes, basifixed anthers, shorter filaments, and a beaked stigma. Based on current collection and available herbarium specimens, Ardisia kalimbahin is distributed in the islands of Palawan (Aborlan), Mindoro, and Luzon (Carranglan). Available data is not enough to assess its conservation status; hence, it is proposed as data deficient (DD).

Keywords: Ericales, Malesia, Myrsinoideae, Southeast Asia, taxonomy, Eudicots

Ardisia kalimbahin

Liezel M. Magtoto, Maverick N. Tamayo, Leonardo C. Udasco Jr. and Rene Alfred Anton Bustamante. 2021. Ardisia kalimbahin (Primulaceae, Myrsinoideae), A New Species from the Philippines. Phytotaxa. 525(4); 295-300. DOI: 10.11646/phytotaxa.525.4.4

 facebook.com/phtaxa/photos/4302296529899878

 facebook.com/516826157/posts/10158644228481158

[Entomology • 2021] Diastolembia thailandensis • A Remarkable New Genus and Species of Embiids (Embioptera: Embiidae) from Thailand

 Diastolembia thailandensis

Poolprasert, Tanruen, Senarat & Edgerly, 2021

JoNUNS.com 

facebook.com/PisitPoolprasert 

Abstract

This research aimed at the morphological and molecular characterization of specimens collected in Thailand to extend the available information on webspinners (Embioptera). The purpose of this article is to describe Diastolembia thailandensis n. gen., n. sp. (Embiidae) from Tak and Chiang Mai provinces. Alate males of this new species are distinguished by having a large lobe of basal segment of left cercus, expansion as angular and echinulate at the apex. Hind basitarsus is short with a single papilla. Meanwhile, apterous females are without distinctive characters. This discovery brings a total of 89 species under 24 genera worldwide for this insect family. Additionally, part of the mtDNA-COI gene of a peculiar new taxon and other Thai webspinner species was reconstructed for a phylogenetic position using the Maximum Likelihood method.

Keywords: Diastolembia thailandensis, Embiidae, Embioptera, new genus and species, Thailand.

Diastolembia thailandensis n. gen., n. sp. 

 

Pisit Poolprasert, Keerati Tanruen, Sinlaprachai Senarat and Janice S. Edgerly. 2021. Diastolembia thailandensis, A Remarkable New Genus and Species of Embiids (Embioptera: Embiidae) from Thailand. Journal of Hunan University Natural Sciences. 48 (10). http://JoNUNS.com/index.php/journal/article/view/768

 facebook.com/PisitPoolprasert/posts/10216778274523859

[Mollusca • 2021] Neolepetopsid True Limpets (Gastropoda: Patellogastropoda) from Indian Ocean Hot Vents shed light on Relationships Among Genera

in Chen, Zhou, ... et Wang, 2021.

DOI: 10.1093/zoolinnean/zlab081

 twitter.com/squamiferum

Researchgate.net/publication/355484934

 

Abstract

Neolepetopsidae is a family of true limpets restricted to deep-sea chemosynthesis-based ecosystems. It is a small and little-studied family with about a dozen species in three genera, namely Eulepetopsis, Neolepetopsis and Paralepetopsis, and all named species were from the Pacific or Atlantic Oceans. Here, we describe three new species from Indian Ocean vents, namely Eulepetopsis crystallina sp. nov. found across three ridges, Neolepetopsis ardua sp. nov. from the Southwest Indian Ridge and Neolepetopsis prismatica sp. nov. from the Carlsberg Ridge. Given that Neolepetopsis appears to specialize on inactive sulfide deposits, the apparent wider distribution of E. crystallina is probably attributable to bias in sampling effort at inactive chimneys. The molecular phylogeny of Patellogastropoda, reconstructed using the COI gene, supported the monophyly of Neolepetopsidae. These are the first molecular data available for Neolepetopsis, confirming that the three genera are genetically distinct. Eulepetopsis appears to be adapted to active vents, and its derived position compared with Paralepetopsis indicates a possible ‘stepping-stone’ evolutionary pathway from seeps and organic falls to vents. Our results provide new insights into this enigmatic family and highlight the importance of surveying the vent periphery, especially given that inactive vents are being eyed as a replacement for active ones in deep-sea mining.

Keywords: deep sea, deep, sea vents, Mollusca, molecular phylogeny

Consensus tree of Patellogastropoda from phylogenetic reconstruction.

Chong Chen, Yadong Zhou, Hiromi Kayama Watanabe, Ruiyan Zhang and Chunsheng Wang. 2021. Neolepetopsid True Limpets (Gastropoda: Patellogastropoda) from Indian Ocean Hot Vents shed light on Relationships Among Genera. Zoological Journal of the Linnean Society. zlab081, DOI: 10.1093/zoolinnean/zlab081

 twitter.com/squamiferum/status/1452104196203843588

Researchgate.net/publication/355484934_Neolepetopsid_true_limpets_Patellogastropoda_from_Indian_Ocean_hot_vents

[Ichthyology • 2021] Eleotris (Teleostei: Eleotridae) from Indonesia with Description of Three New Species within the ‘melanosoma’ Neuromast Pattern Group

Eleotris sp.

in Mennesson, Keith, Sauri, Busson, ... et Hubert, 2021. 

DOI: 10.2984/75.4.2 

 borea.MNHN.fr  twitter.com/UMR_BOREA 

Abstract 

The species of Eleotris from Indonesia are reviewed and compared to the known species described from the area. Nine species are recognized including three new species in the ‘melanosoma’ neuromast pattern group. These are described using genetic and morpho-meristic approaches. The new species differ by a high percentage of genetic divergence in partial COI gene (652 bp) and by several characters including the number of pectoral fin rays, the number of scales in lateral, predorsal, forward and zigzag series. The main characteristics of the other known species in the area in the ‘melanosoma’ group, Eleotris melanosoma Bleeker, 1853 and Eleotris macrolepis (Bleeker, 1875), both belonging to this group, are given for comparison. A key for Eleotris species from Indonesia is provided.

Keywords: Eleotris, cryptic species, Indonesia

Marion I. Mennesson, Philippe Keith, Sopian Sauri, Frédéric Busson, Erwan Delrieu-Trottin, Gino Limmon, Tedjo Sukmono, Jiran, Renny Risdawati, Hadi Dahruddin and Nicolas Hubert. 2021. Eleotris (Teleostei: Eleotridae) from Indonesia with Description of Three New Species within the ‘melanosoma’ Neuromast Pattern Group. Pacific Science. 75(4); 469-495. DOI: 10.2984/75.4.2 

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Les espèces du genre Eleotris d’Indonésie sont passées en revues et comparées avec les espèces décrites dans cette zone. Neuf espèces sont dénombrées dont trois sont nouvelles pour le groupe de papilles sensorielles « melanosoma ». Ces dernières sont décrites à partir d’une analyse génétique combinée à une analyse morpho-méristique. Les nouvelles espèces différent entre elles par d’importants pourcentages de divergence sur le gène partiel COI (652 pb) et quelques caractères morphologiques incluant the nombre de rayons sur les nageoires pectorales, le nombre d’écailles sur la ligne latérale, les prédorsales, la série transverse antérieure et la série zig-zag. Les caractéristiques principales des autres espèces appartenant au groupe « melanosoma », Eleotris melanosoma Bleeker, 1853 et Eleotris macrolepis (Bleeker, 1875), sont données en comparaison. Une clé de détermination des espèces d’Eleotris d’Indonésie est donnée.