• Animal Systematics, Evolution and Diversity
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• 제33권4호
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• pp.256-261
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• 2017

Eucephalobus oxyuroides (de Man, 1876) Steiner, 1936 belonging to the family Cephalobidae Filpijev, 1934 (Cephalobomorpha) is newly reported from South Korea. This species is distinguished from other Eucephalobus species by its pointed tail terminus, high lips and relatively longer female tail and body. From many previous studies, intraspecific variation in this species has been reported for body length, absence/presence of probolae, and number/position of papillae in the posterior region of male, posing an obstacle for identification and phylogenetic analysis. In this study, details of the morphological characters and morphometric of E. oxyuroides Korean population are described and illustrated based on optical microscopy.

• Animal Systematics, Evolution and Diversity
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• 제33권4호
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• pp.274-277
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• 2017

A sea star was collected from the Korea Strait in the waters adjacent to eastern Jeju Island, Korea ($33^{\circ}39^{\prime}86^{{\prime}{\prime}}N$, $127^{\circ}33^{\prime}12^{{\prime}{\prime}}E$) at a depth of 92 m on November 5, 2016. This specimen was identified as Marginaster paucispinus Fisher, 1913, from the family Poraniidae of the order Valvatida, based on morphological characteristics. The genus Marginaster Perrier, 1881 and M. paucispinus, which were first reported in the South China Sea, are new to the Korean fauna. Partial sequences of mitochondrial COI and 16S ribosomal RNA of M. paucispinus were have been determined for the first time and were deposited in GenBank. They are the first molecular records for the genus Marginaster.

• Animal Systematics, Evolution and Diversity
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• 제33권4호
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• pp.267-273
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• 2017

The opossum shrimp, Siriella Dana, 1850 belongs to the family Mysidae Haworth, 1825. It is the genus of an enormous number of species with frequent morphological variations comprising 84 valid species to date. Among the species, Siriella trispina Ii, 1964 has been recorded from the Yellow Sea and the East China Sea is reported from Korean water for the first time. Siriella trispina is characterized by its exceedingly elongated 5th pair of thoracopods, the spines on the inner ventral margin of the uropodal endopod armed with secondary spinules, and 4-5 pairs of spines on the base of the telson. In the present study, we describe Korean specimens of the species in detail with photographs and illustrations. Siriella trispina is the 8th Siriella species found in Korean fauna.

• Animal Systematics, Evolution and Diversity
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• 제33권4호
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• pp.228-234
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• 2017

The first zoeas of Nursia rhomboidalis and Pyrhila carinata were obtained from laboratory condition. They are described and illustrated for the first time. Morphological comparison with those of other Korean described species of the family Leucosiidae reveals that the zoea of N. rhomboidalis is very similar to those of Myra fugax and Arcania undecimspinosa based on characteristics of the carapace spines length, the antenna morphology, the maxilla endopod setation, and the telson, whereas, the zoea of Py. carinata coincides well with those of Philyra kanekoi and Pyrhila pisum based on characteristics of the carapace spines length, the antenna morphology, the maxilla endopod setation, and the telson. Furthermore, we find that at least two groups of zoeas exist in the Korean species of the subfamily Ebaliinae. A provisional key to the known zoeas of ten leucosiid species from Korean waters is provided.

• Animal Systematics, Evolution and Diversity
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• 제36권2호
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• pp.167-174
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• 2020

A halacarid species of the genus Copidognathus is newly reported from Korea: C. daguilarensis Bartsch, 1997, which was described from Hong Kong. It is redescribed herein with detailed illustrations. Korean specimens coincide well with the original description, however, they showed two minor morphological discrepancies from it: quite shorter second palpal segment than the fourth and a modified dorsal seta on the second palpal segment. Korean specimens were rather smaller than the type specimens from Hong Kong, however, they did not show significant differences in the length to width ratios of important body parts. The number of perigenital setae was more variable in the Korean males, ranged 24-29 setae, versus 25-26 in Hong Kong's. Copidognathus daguilarensis is reported for the first time outside the type locality, and joins as the second member of the gibbus group in the northwest Pacific.

• Animal Systematics, Evolution and Diversity
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• 제36권2호
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• pp.107-112
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• 2020

A new genus Parkiana Cho, gen. nov., belonging to Torodorinae of Lecithoceridae, is described from Madagascar, with two new species: P. matutinalis Cho & Agassiz, sp. nov. and P. andasibensis Cho & Agassiz, sp. nov. Although superficially similar to Thubdora Park, 2018, some of their morphological characters, such as wing venation, are unique and the species of the genus are grouped apart from Thubdora in a preliminary phylogenetic analysis based on COI barcode sequences. In addition to the specific descriptions, adults and genitalia for the two new species are illustrated.

• 열처리공학회지
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• 제27권3호
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• pp.115-120
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• 2014

Microstructural features were comparatively investigated in AZ91 (Mg-9%Al-1%Zn) and AZ91-0.5%Sn alloys, in order to clarify the reason for the enhancement in room temperature tensile properties by the addition of small amount of Sn in Mg-Al-based alloy. In as-cast state, the Sn-containing alloy showed increased YS, UTS and elongation than the Sn-free alloy. The microstructural examination revealed that various factors including finer cell size, reduction of lamellar (${\alpha}+{\beta}$) phase and morphological change of bulky ${\beta}$ phase from partially divorced shape to fully divorced shape, are likely to be responsible for the improvement in tensile properties for the Sn-containing alloy. It is noted that two alloys showed similar tensile properties after solution treatment. This implies that microstructural evolution related to the ${\beta}$ phase plays a key role in better tensile properties in the Sn-containing alloy.

• Animal Systematics, Evolution and Diversity
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• 제21권1호
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• pp.31-43
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• 2005

한국의 육수역에 서식하는 발톱갈고리노벌레속 (Onychocamptus)의 3종, 가시 발톱갈고리 노벌레 (O. vitiospinulosa), 돌출발톱갈고리노벌레 (O. mohammed) 및 벵갈발톱갈고리노벌레 (O. bengalensis)을 보고한다. 이중 가시발톱갈고리노벌레와 돌출발톱갈고리노벌레는 한국미기록종이다. 가시발톱갈고리노벌레를 재기재하였다. 이들 3종의 미세 형태학적 형질과 종내변이성에 대한 분류학적 검토를 수행하였고, 그림과 함께 검색표를 작성하였다.

• Animal Systematics, Evolution and Diversity
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• 제17권2호
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• pp.207-216
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• 2001

제주도와 강릉 일대 해안에서 채집한 동문류 1종, Campyloderes macquariae Johnston을 재기재하여 보고한다. 표본은 조하대의 저질, 해조류의 근경부, 그리고 어망에 걸려 나온 여러가지 무척추동물을 헹군 뒤 플랑크톤 넷트에 걸려 채집하였다. Campyloderes 속은 북태평양 해역에서는 최초로 기록된다. 근연종간 형질 비교와 종내 변이를 고찰하였으며, 일부 형질은 주사전자현미경을 사용하여 그 미세구조를 확인하였다.

• Animal Systematics, Evolution and Diversity
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• 제17권2호
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• pp.251-262
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• 2001

거문도 해안의 조하대에서 채집된 갯고사리류를 동정 분류한 결과, 바다나리목(Comantulida). 깃갯고사리과 (Comasteridae)의 가는밭깃갯고사리(Comantheria intermedia), 일본깃갯고사리(Comanthus japonicus), 햇님깃갯고사리 (C. solaster), 그리고 작은발깃갯고사리 (C. parvicirrus)가 한국 미기록종으로 밝혀져 보고한다. 갯고사리류는 우리나라에서 처음으로 보고된다.