[Crustacea • 2020] Macrobrachium naiyanetri, M. palmopilosum et M. puberimanus • Molecular Phylogeny and Species Delimitation of the Freshwater Prawn Macrobrachium pilimanus Species Group (Decapoda: Palaemonidae), with Descriptions of Three New Species from Thailand

Live habitus specimens of three new Macrobrachium species in the M. pilimanus group from Thailand.
Macrobrachium naiyanetri Siriwut; 
Macrobrachium palmopilosum Siriwut; 
Macrobrachium puberimanus Siriwut; 

in Siriwut, Jeratthitikul, Panha, Chanabun & Sutcharit​, 2020. 

DOI: 10.7717/peerj.10137 

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Abstract 

Specific status and species boundaries of several freshwater prawns in the Macrobrachium pilimanus species group remain ambiguous, despite the taxonomic re-description of type materials and additional specimens collected to expand the boundaries of some species. In this study, the “pilimanus” species group of Macrobrachium sensu Johnson (1958) was studied using specimens collected from montane streams of Thailand. Molecular phylogenetic analyses based on sequences of three molecular markers (COI, 16S and 18S rRNA) were performed. The phylogenetic results agreed with morphological identifications, and indicated the presence of at least nine putative taxa. Of these, six morphospecies were recognised as M. malayanum, M. forcipatum, M. dienbienphuense, M. hirsutimanus, M. eriocheirum, and M. sirindhorn. Furthermore, three morphologically and genetically distinct linages were detected, and are described herein as Macrobrachium naiyanetri Siriwut sp. nov., M. palmopilosum Siriwut sp. nov. and M. puberimanus Siriwut sp. nov. The taxonomic comparison indicated wide morphological variation in several species and suggested additional diagnostic characters that are suitable for use in species diagnoses, such as the shape and orientation of fingers, the rostrum form, and the presence or absence of velvet pubescence hairs and tuberculated spinulation on each telopodite of the second pereiopods. The “pilimanus” species group was portrayed as non-monophyletic in both ML and BI analyses. The genetic structure of different geographical populations in Thailand was detected in some widespread species. The species delimitation based on the four delimitation methods (BIN, ABGD, PTP and GMYC) suggested high genetic diversity of the “pilimanus” species group and placed the candidate members much higher than in previous designations based on traditional morphology. This finding suggests that further investigation of morphological and genetic diversity of Southeast Asian freshwater prawns in the genus Macrobrachium is still required to provide a comprehensive species list to guide efforts in conservation and resource management.

Live habitus specimens of three new Macrobrachium species in the M. pilimanus group from Thailand. (A) Macrobrachium naiyanetri sp. nov. (B) Macrobrachium palmopilosum sp. nov. (C) Macrobrachium puberimanus sp. nov.

Warut Siriwut, Ekgachai Jeratthitikul, Somsak Panha, Ratmanee Chanabun and Chirasak Sutcharit​. 2020. Molecular Phylogeny and Species Delimitation of the Freshwater Prawn Macrobrachium pilimanus Species Group, with Descriptions of Three New Species from Thailand. PeerJ. 8:e10137. DOI: 10.7717/peerj.10137

กุ้งก้ามขนชนิดใหม่ของโลก สกุล 𝘔𝘢𝘤𝘳𝘰𝘣𝘳𝘢𝘤𝘩𝘪𝘶𝘮 3 ชนิด จากประเทศไทย

สัตว์สกุลใหม่และชนิดใหม่ของโลกประจำปี 2020 ของ ASRU 

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[Crustacea • 2022] Macrobrachium irwini • A New Species of Freshwater Shrimp (Caridea: Palaemonidae) from Western Ghats, India

Macrobrachium irwini 

Kunjulakshmi, Santos & Prakash, 2022

DOI:  10.11646/zootaxa.5194.3.5 

 twitter.com/KKunjulakshmi

  

Abstract

A new species of the freshwater shrimp of the genus Macrobrachium irwini sp. nov., is described from the Nandhini River near Kateel, Karnataka region of Western Ghats, India. 11 specimens of Macrobrachium irwini sp. nov. were collected from Nandhini river running through a secondary forest with heavily vegetated banks. The morphological analyses revealed that the new species can be clearly distinguished from the closely related species, M. snpurii and M. scabriculum based on the shape and dentition on rostrum, antennular peduncle, segmental ratios of first pereiopod, tubercles along the cutting edges of immovable and movable fingers of second major pereiopod and telson. Additionally, we provided the striking colour patterns on the new species which could be distinguish this species from congeneric species.

Keywords: Crustacea, Western Ghats, freshwater, Macrobrachium, new species, India

Macrobrachium irwini sp. nov.

 

K. Kunjulakshmi, MacLean Antony Santos and S. Prakash. 2022. Macrobrachium irwini sp. nov., A New Species of Freshwater Shrimp from Western Ghats, India (Caridea: Palaemonidae). Zootaxa. 5194(3); 416-425. DOI:  10.11646/zootaxa.5194.3.5

  twitter.com/KKunjulakshmi/status/1577915672759128065

[Crustacea • 2021] Evidence of Cryptic Diversity in Freshwater Macrobrachium Prawns from Indochinese Riverine Systems revealed by DNA Barcode, Species Delimitation and Phylogenetic Approaches

Live habitus coloration of five common Macrobrachium species;
A. M. equidens B. M. niphanae C. M. sintangense 
D. M. dienbienphuense and E. M. lanchesteri.  

in Siriwut, Jeratthitikul, ... et Sutcharit, 2021.

DOI: 10.1371/journal.pone.0252546

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Abstract

The diversity of Indochinese prawns in genus Macrobrachium is enormous due to the habitat diversification and broad tributary networks of two river basins: the Chao Phraya and the Mekong. Despite long-standing interest in SE-Asian decapod diversity, the subregional Macrobrachium fauna is still not yet comprehensively clarified in terms of taxonomic identification or genetic diversification. In this study, integrative taxonomic approaches including morphological examination, DNA barcoding, and molecular species delimitation were used to emphasize the broad scale systematics of Macrobrachium prawns in Indochina. Twenty-seven nominal species were successfully re-verified by traditional and molecular taxonomy. Barcode gap analysis supported broad overlapping of species boundaries. Taxonomic ambiguity of several deposited samples in the public database is related to inter- and intraspecific genetic divergence as indicated by BOLD discordance. Diagnostic nucleotide positions were found in six Macrobrachium species. Eighteen additional putative lineages are herein assigned using the consensus of species delimitation methods. Genetic divergence indicates the possible existence of cryptic species in four morphologically complex and wide-ranging species: M. lanchesteri, M. niphanae, M. sintangense, and some members of the M. pilimanus group. The geographical distribution of some species supports the connections and barriers attributed to paleo-historical events of SE-Asian rivers and land masses. Results of this study show explicitly the importance of freshwater ecosystems in Indochinese subregions, especially for the Mekong River Basin due to its high genetic diversity and species composition found throughout its tributaries.

Representative morphology and live habitus coloration of five common Macrobrachium species;
A. M. equidens B. M. niphanae C. M. sintangense D. M. dienbienphuense and E. M. lanchesteri.

Approximate size shown in scale bar (5 mm).

Conclusion: 

This study provides the first DNA barcode library and cryptic evidence of genus Macrobrachium in Indochina. Diagnostic characters of some species have been detected from nucleotide positions and can be included as additional characters for taxonomic identification and species validation (S1 Table). Despite wide geographical dispersion, several species show low genetic affinity between different geographical populations. In contrast, the morphologically complex Macrobrachium species group possesses high genetic diversity and the geographical distribution shows allopatry between Chao Phraya and Mekong river basins. The broad scale phylogenetic relationships of Indochinese species from the COI dataset are still unresolved. However, examples of stable clade composition and monophyletic lineages are found, especially in estuarine species. The DNA species delimitation suggests several candidate OTUs which might be cryptic species hidden within common species, such as the M. lanchesteri, M. sintangense and M. pilimanus species groups. The barcode gap analysis provides a delimitation threshold for Indochinese taxa despite the high intraspecific variation detected in some species. The inappropriate taxonomic identification of some available sequences from the public database raises caution and suggests that dataset reconstruction and re-verification for further taxonomic comparison is required. Finally, the results of this study indicate that the regional fauna share interconnection with other neighboring regions such as India-Burma and East Asia, as indicated by the records of some widely dispersed species.

Warut Siriwut, Ekgachai Jeratthitikul, Somsak Panha, Ratmanee Chanabun, Peng Bun Ngor and Chirasak Sutcharit. 2021. Evidence of Cryptic Diversity in Freshwater Macrobrachium Prawns from Indochinese Riverine Systems revealed by DNA Barcode, Species Delimitation and Phylogenetic Approaches.   PLoS ONE. 16(6): e0252546. DOI: 10.1371/journal.pone.0252546

  facebook.com/ASRUChula/posts/183360330372780

A. กุ้งฝอยสิงคโปร์ 𝑀𝑎𝑐𝑟𝑜𝑏𝑟𝑎𝑐ℎ𝑖𝑢𝑚 𝑒𝑞𝑢𝑖𝑑𝑒𝑛𝑠 B. กุ้งฝอยคุณนิพันธ์ 𝑀𝑎𝑐𝑟𝑜𝑏𝑟𝑎𝑐ℎ𝑖𝑢𝑚 𝑛𝑖𝑝ℎ𝑎𝑛𝑎𝑒 C. กุ้งฝอยซินตัง 𝑀𝑎𝑐𝑟𝑜𝑏𝑟𝑎𝑐ℎ𝑖𝑢𝑚 𝑠𝑖𝑛𝑡𝑎𝑛𝑔𝑒𝑛𝑠𝑒 D. กุ้งก้ามขนเดียนเบียนฟู 𝑀𝑎𝑐𝑟𝑜𝑏𝑟𝑎𝑐ℎ𝑖𝑢𝑚 𝑑𝑖𝑒𝑛𝑏𝑖𝑒𝑛𝑝ℎ𝑢𝑒𝑛𝑠𝑒 E. กุ้งฝอยแลนเชสเตอร์ 𝑀𝑎𝑐𝑟𝑜𝑏𝑟𝑎𝑐ℎ𝑖𝑢𝑚 𝑙𝑎𝑛𝑐ℎ𝑒𝑠𝑡𝑒𝑟𝑖

[Crustacea • 2020] Why do Shrimps leave the Water? Mechanisms and Functions of Parading Behaviour in Freshwater Shrimps

Macrobrachium dienbienphuense Dang & Nguyen, 1972

Parading shrimps synchronously walking on land at night at the Lamduan Rapids, Ubon Ratchathani, Thailand. 

in Hongjamrassilp, Maiphrom et Blumstein, 2020. 

 DOI: 10.1111/jzo.12841

 Photos: Watcharapong Hongjamrassilp 

Researchgate.net/publication/345661173

Abstract

An understanding of the mechanisms and functions of animal migratory behaviour may provide insights into its evolution. Furthermore, knowledge about migration may be important for conservation of rare species and may help to manage species in a rapidly changing world. Upstream migration is common in riverine animals, but little is known about proximate cues and functions of the upstream migration in aquatic macroinvertebrates. In Ubon Ratchathani, Thailand, locals have observed a synchronous mass migration of freshwater shrimps on land. This so‐called ‘parading behaviour' occurs annually during the rainy season and has become a large ecotourism event. Yet, we know little about the natural history, proximate causation and function of this extraordinary behaviour. Here we describe the natural history of parading behaviour and report the results from a series of experiments and observations to address its mechanisms and functions. Parading behaviour is not associated with breeding and spawning; rather, shrimps leave the water to escape strong currents. Conditions promoting shrimps to leave the water include low light, high water velocity and low air temperature. In addition, there is variation explained the specific location. River topology that creates hydrological variability and turbulence plays a role in triggering the shrimps to move out of water. Furthermore, turbidity and water chemistry were associated with shrimp activity. Finally, our results support that parading behaviour in freshwater shrimps is a mass movement upstream due to hydrological displacement. This study highlights the mechanisms that stimulate parading behaviour; a common activity in Macrobrachium and other decapod crustaceans.

Keywords: collective movement, freshwater prawn, Macrobrachium dienbienphuense, migration, Southeast Asia

Parading shrimps synchronously walking on land at night at the Lamduan Rapids, Ubon Ratchathani, Thailand. 

Photo: Watcharapong Hongjamrassilp.

 

W. Hongjamrassilp, W. Maiphrom and D. T. Blumstein. 2020. Why do Shrimps leave the Water? Mechanisms and Functions of Parading Behaviour in Freshwater Shrimps. Journal of Zoology. DOI: 10.1111/jzo.12841

Researchgate.net/publication/345661173_Why_do_shrimps_leave_the_water_Mechanisms_and_functions_of_parading_behaviour_in_freshwater_shrimps

These Shrimp Leave the Safety of Water and Walk on Land. But Why?

A biologist decided to investigate a shrimp parade that attracts thousands of tourists in a province of Thailand.

 NYTimes.com/2020/11/18/science/shrimp-parade-thailand.html

[Crustacea • 2020] Macrobrachium saengphani • Morphology and Molecular Phylogeny of Wild Prawn (Decapoda: Palaemonidae) from Northern Thailand

 Macrobrachium saengphani 

 Saengphan, Panijpan, Senapin, Suksomnit & Phiwsaiya, 2020

DOI: 10.11646/zootaxa.4868.4.4 

Abstract

A small wild prawn of the genus Macrobrachium, found in Chiang Rai Province, Northern Thailand has some morphological features resembling four other closely related species, M. lanchesteri, M. peguense, M. kunjuramani, and M. chainatense. However, it is distinguishable from the above species in terms of distinctive golden colored antennules; number of teeth on the rostrum; number of teeth on the cutting edges of the second pereiopod; and length of carpus relative to that of chela on the second pereiopod. Moreover, DNA analysis places it far apart on the phylogenetic tree from the related species in the genus.

Keywords: Crustacea, Macrobrachium, molecular phylogeny, morphology, freshwater prawn, Thailand, Chiang Rai

Nukul Saengphan, Bhinyo Panijpan, Saengchan Senapin, Auaree Suksomnit and Kornsunee Phiwsaiya. 2020. Morphology and Molecular Phylogeny of Macrobrachium saengphani sp. nov. (Decapoda: Palaemonidae) from Northern Thailand. Zootaxa. 4868(4); 531–542. DOI: 10.11646/zootaxa.4868.4.4

[Crustacea • 2020] Macrobrachium tenuipes • A New Stygophile Freshwater Prawn Species (Caridea: Palaemonidae) from A Karst Cave of Guangxi, southwestern China

Macrobrachium tenuipes 

Zhou, Chen, Zheng, Chen & Guo, 2020

 DOI: 10.11646/zootaxa.4759.4.3

Abstract

Based on morphological, molecular, and ecological evidences, a fourth species of cave-dwelling shrimp Macrobrachium tenuipes sp. nov. is described from Guangxi Zhuang Autonomous Region, southwestern China. This new species with smooth carapace and the extremely slender pereiopods, can be separated from other congeners by the shape of rostrum; the segmental ratios, the arrangement of teeth on the cutting edge of the fingers of second pereiopod; the longer and narrower scaphocerite; and the longer uropodal diaeresis spine. The new taxon is genetically distinct from 18 other species of Macrobrachium for which COI and 18S rRNA sequences are available. The data observed on the habitat and ecology will contribute to the conservation for M. tenuipes sp. nov.

Keywords: Crustacea, Macrobrachium, New species, Stygophile prawn, Freshwater biodiversity, Integrative taxonomy, Karst landform, Spelaeology, Southwestern China

Macrobrachium tenuipes  

Xiao-Ping Zhou, Qing-Hua Chen, Xiao-Zhuang Zheng, Wen-Jian Chen and Zhao-Liang Guo. 2020. Macrobrachium tenuipes, A New Stygophile Freshwater Prawn Species (Crustacea: Caridea: Palaemonidae) from A Karst Cave of Guangxi, southwestern China. Zootaxa. 4759(4); 511–529. DOI: 10.11646/zootaxa.4759.4.3

[Crustacea • 2017] Redescription of the Freshwater Shrimp Macrobrachium jelskii (Miers, 1877) (Caridea, Palaemonidae)

Macrobrachium jelskii (Miers, 1877)  

DOI:  10.11646/zootaxa.4269.1.2 

Abstract

Macrobrachium jelskii is a freshwater shrimp endemic to South America, occurring in all major Brazilian basins. It is used in various activities, such as fishing, fishkeeping and even as food for humans and animals, and therefore its distribution is affected by anthropic influence. Misidentification of M. jelskii is recurrent because of its morphological similarity to some sympatric species such as M. amazonicum and M. acanthurus. Thus, the aim of this study is to redescribe M. jelskii, proposing some characteristics that allow for a clearer differentiation of this species when compared to other similar congeneric species that occur in South America. The informative characters were the size and the shape of the rostrum, the ratio of the carpus and chela, the ratio of the chela and carapace length and the shape of the carpus of the second pereiopod, as well as the ratio between the length of the internal pair of posterior spine of telson and median apex of the posterior margin of telson. Although the intraspecific variability is high, the combination of the characters mentioned herein, including a morphological key, is very useful and makes it easier to differentiate between these three species.

Keywords: Crustacea, Decapoda, identification key, Macrobrachium amazonicum, Macrobrachium acanthurus, South America

Ana Luiza Vera-Silva, Fabrício L. Carvalho and Fernando Luis Mantelatto. 2017. Redescription of the Freshwater Shrimp Macrobrachium jelskii (Miers, 1877) (Caridea, Palaemonidae). Zootaxa. 4269(1); 44–60. DOI:  10.11646/zootaxa.4269.1.2

[Crustacea • 2016] Macrobrachium spelaeus | กุ้งถ้ำพระวังแดง • A New Species of Stygobitic Freshwater Prawn (Decapoda: Palaemonidae) from northern Thailand

กุ้งถ้ำพระวังแดง | Macrobrachium spelaeus 

Cai & Vidthayanon, 2016
  LKCNHM.nus.edu.sg

Abstract

 A new species of stygobitic freshwater prawn, Macrobrachium spelaeus from Tham Phra Wang Daeng, Pitsanulok Province, in northern Thailand, is described and illustrated in detail. Morphological comparisons with allied epigean species M. dienbienphuense and known stygobitic congener M. poeti are given. The new species is characterised by its reduced eyes, smooth and slender second pereiopods, hairy chelae and short carpus of second pereiopods, and elongated telson.

Key words. New species, Macrobrachium, stygobitic, freshwater prawn, Thailand

   

TAXONOMY

Palaemonidae Rafinesque, 1815

Macrobrachium Bate, 1868

Macrobrachium spelaeus, new species

Colouration (live). Yellowish pale cephalothorax with pale yellow and brown visceral mass, rostrum translucent, eyes black, abdomen opaque with brownish hue dorsally. Hairs on chelae pale brown, antennas and appendages opaque.

Habitat. Macrobrachium spelaeus is known only from shallow (0.3–1 m depth) subterranean streams in the type locality, over 100 m from the cave entrance, at Tham Phra Wang Daeng of the Tham Phra Karst in Klong Chompu area of Thung Salaeng Luang National Park.

Etymology. The new species is named spelaeus (L., caved-welling), after its stygobitic habit.

Yixiong Cai and Chavalit Vidthayanon. 2016. Macrobrachium spelaeus, A New Species of Stygobitic Freshwater Prawn from Thailand (Decapoda: Palaemonidae).  RAFFLES BULLETIN OF ZOOLOGY. 64: 117–122. 

https://lkcnhm.nus.edu.sg/nus/images/data/raffles_bulletin_of_zoology/vol64/64rbz117-122.pdf

กุ้งถ้ำพระวังแดง  อีกหนึ่งชนิดใหม่ จากถ้ำพระวังแดง อช. ทุ่งแสลงหลวง พิษณุโลก ยังมีอีกหลาย species ที่ยังไม่มีการสำรวจในภูมินิเวศเขาหินปูนนี้ 

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[Crustacea • 2015] Macrobrachium xmas • A New Stygobitic Prawn of the Genus Macrobrachium Spence Bate, 1864, from Anchialine Caves in Christmas Island, Indian Ocean; with A Rediagnosis of M. miyakoense Komai & Fujita, 2005 (Decapoda: Caridea: Palaemonidae)

Macrobrachium xmas  Fujita, Davie & Ng.,2015

Y. Fujita, P. J. F. Davie and P. K. L. Ng. 2015. RAFFLES BULLETIN OF ZOOLOGY. 63

Abstract

 A new species of stygobitic palaemonid prawn of the genus Macrobrachium Spence Bate, 1864, is described from Christmas Island, Indian Ocean Territory, Australia. The new anchialine species resembles M. miyakoense Komai & Fujita, 2005, from Japan, but can be distinguished by its relatively longer and more slender rostrum, the proportionately smaller eye cornea with a more swollen eye stalk, and more teeth on the post-rostral margin of the carapace. The taxonomy of M. miyakoense is also discussed based on additional material recently obtained from Japan, and the species rediagnosed. Macrobrachium miyakoense was originally described from two young males collected from Miyako Island, Ryukyu Islands, Japan.

Key words. Palaemonidae, Macrobrachium, new species, anchialine cave, Christmas Island, Indian Ocean, taxonomy

TAXONOMY

Family Palaemonidae

Macrobrachium miyakoense Komai & Fujita, 2005 (Figs. 1–3)

Macrobrachium miyakoense – Komai & Fujita, 2005: 14; De Grave & Fransen, 2011: 327.

Remarks. Macrobrachium miyakoense was originally described from two young males (pocl 14.70 mm and 12.60 mm). The present full-grown specimens are similar in morphology to the type specimens, but some adult characters differ markedly. We have therefore amended the original description of Komai & Fujita (2005) accordingly and provided new figures.

Macrobrachium xmas n. sp.

Macrobrachium microps – Short & Meek, 2000: 83–85, fig. 2
[not Macrobrachium microps Holthuis, 1978].

Color in life. Whole body (carapace, abdomens, and appendages) generally whitish to pale yellow (Figs. 13, 14).

Habitat and Biology. Macrobrachium xmas n. sp. was collected from three anchialine caves (Freshwater Cave, Runaway Cave and Whip Cave). Specific habitat information for these localities has been given by Humphreys & Eberhard (2001). Co-inhabiting decapod crustaceans reported from Christmas Island caves include: a procaridid Procaris noelensis Bruce & Davie, 2006, an alpheid Metabetaeus minutus (Whitelegge, 1897), a barbouriid Parhippolyte cf. uveae Borradaile, 1899, an atyid Antecaridina lauensis (Edmondson, 1935), and three crabs, Karstarma jacksoni (Balss, 1934) [Sesarmidae], Orcovita hicksi Davie & Ng, 2012, and Orcovita orchardorum Davie & Ng, 2012 [both Varunidae] (Anker, 2010; Bruce & Davie, 2006; Davie & Ng, 2012). In this study, two ovigerous females of M. xmas were collected, and the pre-eyed eggs are small, 0.56–0.70 mm (on female pocl 21.66 mm, ZRC 2015.281, average 0.64 mm, n = 10) in size, suggesting an amphidromous life cycle.

Distribution. Only known from Christmas Island thus far. 

Etymology. The new species name is a common arbitrary abbreviation of “Christmas” and is derived from the type locality, Christmas Island. The name is used as a noun in apposition.

Yoshihisa Fujita, Peter J. F. Davie and Peter K. L. Ng. 2015. A New Stygobitic Prawn of the Genus Macrobrachium Spence Bate, 1864, from Anchialine Caves in Christmas Island, Indian Ocean; with A Rediagnosis of M. miyakoense Komai & Fujita, 2005 (Crustacea: Decapoda: Caridea: Palaemonidae). RAFFLES BULLETIN OF ZOOLOGY. 63: 610–625. 

http://lkcnhm.nus.edu.sg/nus/images/data/raffles_bulletin_of_zoology/vol63/63rbz610-625.pdf

[Crustacea • 2015] Macrobrachium phongnhaense • A New Species of Troglobitic Freshwater Prawn of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) from Phong Nha-Ke Bang National Park, Quang Binh Province, Vietnam

Macrobrachium phongnhaense

Tu & Cuong, 2015
DOI: 10.15625/0866-7160/v36n3.5969

ABSTRACT

Macrobrachium phongnhaense sp. n. is a new species of troglobitic shrimp discovered in some caves of Phong Nha-Ke Bang National Park, Quang Binh province, Vietnam.

Habitat: This species lives in streams and standing water in the caves. These caves can be very long, about 4-5 km, such as Va Cave. They are completely without light and water in the cave is mainly from infiltration. Substrate can be silt, muddy or sandy mud.

Distribution: Found only in a few caves (Va, 35, Son Doong) in the Phong Nha-Ke Bang National Park, Quang Binh province, Vietnam.

Etymology: Shrimp named for location where first obtained in caves in the Phong Nha-Ke Bang National Park.

Remarked: The new species is characterized by a transparent body, highly degenerated eyes, smooth and slender second pereiodpods, elongated telson and unarmed preanal region. Morphological comparisons with allied troglobitic congeners are given in table 1.

Do Van Tu and Nguyen Tong Cuong. 2015. A New Species of Troglobitic Freshwater Prawn of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) from Phong Nha-Ke Bang National Park, Quang Binh Province, Vietnam.

Tap Chi Sinh Hoc (Vietnam Journal of Biology)  36(3); 301-308.

DOI: 10.15625/0866-7160/v36n3.5969

BiodiVN.com/2015/05/mot-loai-tom-nuoc-ngot-moi-cho-khoa-hoc.html

[Crustacea • 2007] The Giant Freshwater Prawns of the Macrobrachium rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae); M. rosenbergii & M. dacqueti

ABSTRACT

The present study of the giant freshwater prawns, Macrobrachium rosenbergii species group, examined a large series of wild-caught specimens from most of its known distribution. The results confirm that what has been called M. rosenbergii actually belongs to two separate species, easily-separated by a number of diagnostic adult morphological characters. Macrobrachium rosenbergii (de Man, 1879) sensu stricto occurs in Australia, Papua New Guinea, eastern Indonesia (east of Huxley’s Line including Bali) and the Philippines (including Palawan). The second species, which is actually the one more widely fished and extensively cultured in America, Asia and Africa, is here identified as M. dacqueti (Sunier, 1925), and occurs throughout South and Southeast Asia, as well as Indochina. This latter species is one of the most commercially important crustaceans in the world.

KEY WORDS: Taxonomy, Crustacea, Caridea, Palaemonidae, Macrobrachium rosenbergii.

Wowor, D. and Ng, P.K.L. 2007. The Giant Freshwater Prawns of the Macrobrachium rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae). Raffles Bulletin of Zoology. 55: 321-336.

http://lkcnhm.nus.edu.sg/rbz/biblio/55/55rbz321-336.pdf

[Crustacea • 2013] A New Record of the Giant Freshwater Prawn, Macrobrachium spinipes (Schenkel, 1902) (Crustacea: Decapoda: Palaemonidae) from Taiwan, with notes on its taxonomy

Macrobrachium spinipes (Schenkel, 1902) is recorded from Taiwan for the first time and extends the distribution of the species to north of the Tropic of Cancer

http://facebook.com/photo.php?fbid=10151978915599672

Abstract

The giant freshwater prawn Macrobrachium spinipes (Schenkel, 1902) is recorded from Taiwan for the first time and extends the distribution of the species to north of the Tropic of Cancer. The Taiwanese specimens differ slightly from material from Indonesian Papua in the density of the spination of the adult second pereipods, the relative length of the ridge of the posterior submedian plate of thoracite sternite 4, and the color of the carapace, abdomen and pleural condyles.

Keywords: Crustacea, Caridea, Macrobrachium spinipes, new record, Taiwan

Shy, J.Y., Wowor, D. and Ng, P.K.L. 2013. A New Record of the Giant Freshwater Prawn, Macrobrachium spinipes (Schenkel, 1902) (Crustacea: Decapoda: Palaemonidae) from Taiwan, with notes on its taxonomy. Zootaxa. 3734(1): 45-55. 

DOI http://dx.doi.org/10.11646/zootaxa.3734.1.5

http://www.mapress.com/zootaxa/2013/f/z03734p055f.pdf