Taxonomic review on east Asian lynceid conchostracans (Crustacea, Branchiopoda, Laevicaudata), with redescription of<i>lynceus biformis</i>of Korea

Yoon, Seong Myeong; Kim, Won

doi:10.1080/12265071.2000.9647535

Cited by 5 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5D), but no full description of the larval development has yet appeared. Females from Korea reportedly have only 10 pairs of setose trunk limbs (Yoon & Kim, 2000). However, our specimens from Ha-dong, Gyeongju-si, Gyeongsangbuk-do, South Korea have 12 pairs of setose trunk limbs, like females from Japan (see below).…”

Section: Introductionmentioning

confidence: 70%

“…data). It also has been reported from rice paddies in South Korea (Yoon & Kim, 2000) and an ephemeral pool in Taiwan (Wang et al, in press). Light microscopical and SEM photos of the nauplius larvae have been published (Lin & Chou, 1991, fig.…”

Section: Introductionmentioning

confidence: 97%

“…These flaps were described as "opercular lamellae" on L. biformis by Yoon & Kim (2000), as well as on L. gracilicornis by Martin et al (1986), although only the latter authors considered the lamella to represent a limb pair. There is never more than one bilobate flap present, and on post-naupliar specimens it is the posterior limb.…”

Section: Trunk Limb Developmentmentioning

confidence: 99%

See 2 more Smart Citations

Variability of trunk limbs along the anterior/posterior body axis of juvenile and adult Lynceus biformis (Ishikawa, 1895) (Branchiopoda, Laevicaudata, Lynceidae)

2012

Crustac

View full text Add to dashboard Cite

Morphology of trunk limbs of the laevicaudatan branchiopod Lynceus biformis (Ishikawa, 1895) varies along the anterior/posterior axis of the body. On anterior limbs, the praecoxal endite is elongate and strongly flexed, endites of the coxa and basis are broad, and lobes of the endopod are elongate. On more posterior limbs protopodal endites and endopodal lobes are more similar to each other and none is particularly long or broad. In addition, an exite fails to form on more posterior limbs, and the exopod becomes progressively reduced in males or modified in females. Sexual dimorphism is expressed by fewer trunk limbs, 10, and a transformed trunk limb 1 of males, as well as by a modified exopod of posterior trunk limbs 8-12 of females. Development of all limbs includes an asetose step and several setose steps; some limb pairs may begin as a transverse bilobate flap. Developmental changes include the progressive addition of limbs posteriorly, addition of endites and lobes to some limbs, addition of an exite and proximal rod-like structure during the transformation to a setose limb, and the transformation of sexually dimorphic limbs during the molt to the adult. Naupliar asetose limbs 1-5 have fewer endites and lobes than the more posterior asetose limbs of juveniles have.The male clasper of L. biformis is a subchela formed from the basis and the distal segment of the endopod; the proximal and middle endopodal segments are closely associated with the subchela. In contrast, the clasper of male spinicaudatans is a subchela formed from the distal endopodal segment and the proximal of two middle segments of the endopod. The distal of the two middle endopodal segments and the palp it bears (together, the so-called "articulated palp") are absent in the clasper of L. biformis. The modified exopod on trunk limbs 7-10 of females of L. biformis has no similarly transformed counterpart on limbs of female spinicaudatans. There is no discoid endite on the trunk limb of L. biformis as there is on trunk limbs of spinicaudatans, and no setose attenuate endite either, although the asetose rod-like structure may be homologous to the latter. ZUSAMMENFASSUNG

show abstract

Section: Introductionmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 97%

Section: Trunk Limb Developmentmentioning

confidence: 99%

See 1 more Smart Citation

Variability of trunk limbs along the anterior/posterior body axis of juvenile and adult Lynceus biformis (Ishikawa, 1895) (Branchiopoda, Laevicaudata, Lynceidae)

2012

Crustac

View full text Add to dashboard Cite

show abstract

“…sp., is the 9th described species from Asia Shu et al, 2019), and the second from Mongolia. Naganawa and Zagas (2002) mention two Lynceus from the Gobi Steppe of Mongolia: L. dauricus Thiele, 1907, now synonymous with L. biformis (Yoon and Kim, 2000), and Lynceus sp. (Naganawa et al 2001, indetermined).…”

Section: Discussionmentioning

confidence: 99%

A new Northeast Asian Lynceus (Crustacea: Branchiopoda: Laevicaudata) with uniquely modified thoracopods and an evaluation of DNA barcoding for clam shrimp species identification

et al. 2020

View full text Add to dashboard Cite

A new species of smooth clam shrimp (Branchiopoda: Laevicaudata) from Mongolia and China is described here based on both morphological and genetic differences. The new species, Lynceus grossipedia n. sp., has unique features, including asymmetrically modified male thoracopods (left side thoracopods III-VI), male claspers "movable finger" (=endopod) with delicate setation, and broad, bicarinate male and female rostrum. Lynceus grossipedia n. sp. is compared with the genera Paralimnetis Gurney, 1931 and Lynceiopsis Daday, 1912 and a recently described Lynceus Müller, 1776 from China, also showing modified male thoracopods. Lynceus mandsuricus Daday, 1927 is declared nomen inquirendum. DNA barcoding has not previously been applied on smooth clam shrimp taxonomy, so we generated new cytochrome c oxidase (COX1) data for 10 Lynceus species in order to explore its usefulness for Laevicaudata. Previous Laevicaudata sequences in GenBank were scarce (~50) and biased, with 62% (n=31) being assigned to a single taxon (i.e., Lynceus macleayanus) and 28% (n=14) not assigned to species. Based on the addition of new barcoding data and the comparison with GenBank data for other clam shrimps, we conclude that distance thresholds between species (=barcoding gap) are similar for all three suborders (Spinicaudata, Cyclestherida, and Laevicaudata).

show abstract

“…This finding reveals that two Japanese laevicaudatan species are separated by the Tsugaru Strait. However, if L. biformis really has Russian localities as reported in Yoon & Kim (2000), Hokkaido (including the study area) may also support this species. To date, there are few records of large branchiopods from Hokkaido (Kikuchi 1957, Takahashi et al 2018 and this study), and further field research and material based examinations are needed.…”

mentioning

confidence: 84%

A new record of <i>Lynceus brachyurus</i> Müller, 1776 (Laevicaudata: Lynceidae) from the Shiretoko Peninsula, Northeast Japan

Takahashi¹

2020

Plankton Benthos Res

View full text Add to dashboard Cite

Taxonomic review on east Asian lynceid conchostracans (Crustacea, Branchiopoda, Laevicaudata), with redescription oflynceus biformisof Korea

Cited by 5 publications

References 3 publications

Variability of trunk limbs along the anterior/posterior body axis of juvenile and adult Lynceus biformis (Ishikawa, 1895) (Branchiopoda, Laevicaudata, Lynceidae)

Variability of trunk limbs along the anterior/posterior body axis of juvenile and adult Lynceus biformis (Ishikawa, 1895) (Branchiopoda, Laevicaudata, Lynceidae)

A new Northeast Asian Lynceus (Crustacea: Branchiopoda: Laevicaudata) with uniquely modified thoracopods and an evaluation of DNA barcoding for clam shrimp species identification

A new record of <i>Lynceus brachyurus</i> Müller, 1776 (Laevicaudata: Lynceidae) from the Shiretoko Peninsula, Northeast Japan

Contact Info

Product

Resources

About