identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
038EF712FF9FFFE11FAE3DCDFA876F26.text	038EF712FF9FFFE11FAE3DCDFA876F26.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Rhizocephala Muller 1862	<div><p>Infraclass Rhizocephala Müller, 1862 Family Peltogastridae Lilljeborg, 1861; amended by Høeg et al. (2020) Family: Peltogastridae Lilljeborg, 1861 Genus: Briarosaccus Boschma, 1930</p><p>Briarosaccus hoegi sp. nov. (Figs. 4–9) urn:lsid:zoobank.org:act:9af55c57-02a9-4f66-ae1dc43e7bf5c440</p><p>Etymology: The new species is named in honor of Jens Thorvald Høeg, professor of the Department of Biology (University of Copenhagen, Denmark), who has spent most of his professional life investigating thoracican and rhizocephalan barnacles.</p><p>Material examined: Holotype: One specimen (21.4/9.0 mm, with embryos), on Hapalogaster dentata (female, 19.2 mm width), depth 2–3 m, Zhitkova Cove (43°01'07.9"N, 131°55'49.1"E), 21.05.2023 (catalogue number 46887, MIMB).</p><p>Paratypes: One specimen (10.0/ 3.5 mm, without embryos), on H. dentata (female, 13.0 mm width), depth 2–3 m, Sobol Cove, 19.07.2023 (catalogue number 46888, MIMB); Two specimens (12.3/ 5.2 mm, without embryos and 11.0/ 6.2 mm, with embryos), on H. dentata (male, 19.0 mm width), depth 2–3 m, near the Cape Vyatlina, 3.06.2020 (catalogue number 46889, MIMB).</p><p>Voucher specimens: Two specimens (20.4/ 8.9 mm, with embryos and 18.1/ 6.6 mm, with embryos), on H. dentata (female, 18.1 mm width), depth 2–3 m, Zhitkova Cove, 14.05.2020 (catalogue number 46890, MIMB); One specimen (12.1/ 5.4 mm, with embryos), on H. dentata (female, 11.1 mm width), depth 2–3 m, Zhitkova Cove, 14.05.2020 (catalogue number 46891, MIMB).</p><p>Specimens for histology: One specimen (15.9/10.0 mm, with embryos), on H. dentata (male, 21.0 mm width), depth 2–3 m, near the Cape Vyatlina, 3.06.2020; One specimen (7.1/2.0 mm, without embryos), on H. dentata (male, 17.7 mm width), depth 2–3 m, near the Cape Vyatlina, 22.11.2022.</p><p>Specimens for SEM: One specimen (13/ 4.6 mm, without embryos), on H. dentata (female, 18.5 mm width), depth 2–3 m, Sobol Cove, 16.03.2023; One specimen (12.0/ 4.7 mm, without embryos), on H. dentata (female, 16.0 mm width), depth 2–3 m, Sobol Cove, 15.02.2023; One specimen (22.0/ 10.5 mm, with embryos), on H. dentata (female, 18.2 mm width), depth 2–3 m, Zhitkova Cove, 21.05.2020; One specimen (20.4/ 7.8 mm, with embryos), on H. dentata (female, 19.5 mm width), depth 2–3 m, Zhitkova Cove, 21.05.2020; One specimen (18.0/ 7.5 mm, with embryos), on H. dentata (male, 16.5 mm width), depth 2–3 m, Zhitkova Cove, 21.05.2020; One specimen (20.1/ 7.8 mm, with embryos), on H. dentata (female, 18.6 mm width), depth 2–3 m, Zhitkova Cove, 21.05.2020.</p><p>Briarosaccus tenellus on Hapalogaster mertensii: One specimen (11.5/ 4.3 mm, without embryos), on H. mertensii (female, 12.5 mm width), intertidal, Sitka (Alaska), 07.2012; One specimen (15.5/ 4.5 mm, without embryos), on H. mertensii (female, 17.2 mm width), intertidal, Sitka (Alaska), 07.2012; One specimen (8.5/ 2.5 mm, without embryos), on H. mertensii (female, 13.0 mm width), One specimen (10.6/ 2.8 mm, without embryos), on H. mertensii (female, 13.5 mm width), intertidal, Sitka (Alaska), 07.2012 (catalogue number 47652, MIMB); One specimen (10.3/ 3.8 mm, with embryos), on H. mertensii (female, 11.1 mm width), intertidal, Sitka (Alaska), 07.2012; One specimen (11.5/4.0 mm, with embryos), on H. mertensii (male, 16.2 mm width), intertidal, Sitka (Alaska), 07.2012.</p><p>Type locality: Zhitkova Cove (43°01'07.9"N, 131°55'49.1"E, Ussuriysky Bay, Peter the Great Bay, Sea of Japan).</p><p>Host: Briarosaccus hoegi sp. nov. was found on the crab Hapalogaster dentata (De Haan, 1849) (Anomura: Lithodidae). H. dentata differs from the related species H. mertensii by the seven spines along the lateral margin of the carapace and by the tubercles on the first pereopods (Makarov 1938). The morphological species identification of H. dentata was confirmed by molecular data (Fig. S8; Table S5).</p><p>The carapace width of the infested crabs ranged from 10.1 to 19.5 mm. The prevalence of infestation in the crab population reached 6.3%. Most crabs were singly infested, while some specimens of H. dentata carried two to four externae (Fig. 1A–D).</p><p>Distribution and bathymetrical range: We sampled the host crab Hapalogaster dentata in Peter the Great Bay at a depth of about 2– 3 m. This species is also widely distributed in coastal intertidal and subtidal waters of Japan, from Hokkaido to Kyushu, and the Korean Peninsula (Goshima et al. 1995; Marin 2013). We have no data on the true geographical distribution and depth range of the new parasite.</p><p>Externa morphology: The externa of Briarosaccus hoegi sp. nov. is attached to the basal part of the soft ventral side of the host abdomen via a short stalk, which connects the externa with the internal trophic root system. Its long axis is at right angle to that of the host (Fig. 1). The externa varies from 5.3 to 22 mm in length and from 1.0 to 10.5 mm in height. The externa is elongated, cylindrical and slightly curved with the ventral outline being convex, and the dorsal outline concave. Anterior part is unilobed, slightly thicker than the posterior one and oriented to the left side of the host (Fig. 1A, E, F). Posterior end of the externa is rounded. The stalk is near the central part of the dorsal side. The chitinous shield around the stalk is fusiform, has growth rings, and covers from 1/4 to 1/3 of the externa. The mantle opening is placed in the anterior part on the right side of the externa facing the host. It is not elevated but slit-like and surrounded by lips (Figs. 1E, 8D).</p><p>The overall shape and color of Briarosaccus hoegi sp. nov. varies due to the stage of the reproductive cycle. The immature externa without embryos in the mantle cavity is reddish, the color of mature externa with embryos is white, yellow, pale, or light brown (before larval hatching) (Fig. 1A–D). The interna roots are green.</p><p>The mantle is thick – from 84 to 117 μm in a immature rhizocephalan and from 157 to 212 μm in a mature specimen (Fig. 4A, B). The muscle sphincter surrounding the mantle opening is visible (Fig. 4C, D). A visceral sac extends dorsally along most of the externa (Fig. 4A). The ovary is composed of large numbers of developing oocytes, arranged in tubes (Fig. 5). The ventral part of the mantle cavity is densely filled with developing embryos. From mid-May to mid-July, all investigated externae were ovigerous. The colleteric glands represent short folded flattened tubes about of 0.5 mm in length located inside the visceral sac on the lateral sides of the ovary inside the shield level (Fig. 5C, D). The colleteric glands expand in the middle part, with a larger diameter ranging from 200 to 350 μm in immature externae and up to 800 μm in mature ones (Fig. 5C, D). Before opening into the mantle cavity, the colleteric gland bends and two tubes with a diameter of 100–150 μm are observed on the section.</p><p>Paired receptacles represent cylindrical tubes 1.8–3.5 mm in length located in the dorsal part of the visceral sac and parallel to the long axis of the externa (Fig. 6). Receptacles begin and end inside the shield level. Anterior tops of receptacles are blind. Anterior parts with a diameter of about 150 μm are narrow, slightly flattened and more or less straight, central parts with a diameter from 200 to 270 μm are slightly twisted (Fig. 7A, D). Receptacles gradually pass into receptacle ducts with a diameter of 80–100 μm in immature externae and up to 200 μm in mature ones (Fig. 7B, C, E, F). The receptacle ducts are coiled in immature externae and almost straight in mature ones. They open on the lateral surfaces of the visceral sac.</p><p>Mantle cuticle: The width of Briarosaccus hoegi sp. nov. external (outer) cuticle with “collagen fibers” is 25–50 μm. It is smooth, without papillae or excrescences (Fig. 4B) and covered with longitudinal grooves (Fig. 8B). A dorsal strip of transversal grooves from the mantle opening to the stalk is visible (Fig. 8A). In SEM, this strip and area around the mantle opening is cellular (Fig. 8C). The mantle opening is densely covered with numerous spines (hairs) of 8–10 μm in length (Fig. 8D–F). Moreover, rounded depressions are rarely scattered on the outer cuticular surface (Fig. 8G).</p><p>The internal (inner) cuticle is wrinkled and covered with sparse hairs (finger-like processes) of 1.5–3.0 μm in length which may be united in groups with a common base (Fig. 8H). Retinacula of 10–20 μm in length, densely barbed, single or united into groups of 2–4 are rarely found (Fig. 8I, J).</p><p>Larvae: Nauplii of Briarosaccus hoegi sp. nov. have a reticulated collar and also a distinct naupliar eye demonstrating positive phototaxis (Fig. 9).</p></div>	https://treatment.plazi.org/id/038EF712FF9FFFE11FAE3DCDFA876F26	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Olga M.;Golubinskaya, Darya D.;Sharina, Svetlana N.;Noever, Christoph;Glenner, Henrik	Korn, Olga M., Golubinskaya, Darya D., Sharina, Svetlana N., Noever, Christoph, Glenner, Henrik (2024): Rhizocephalan Barnacle Briarosaccus hoegi sp. nov. - a Parasite of the Stone Crab Hapalogaster dentata (De Haan, 1849) from Peter the Great Bay (Sea of Japan). Zoological Studies 63 (29): 1-16, DOI: 10.6620/ZS.2024.63-29, URL: http://dx.doi.org/10.5281/zenodo.14702068
038EF712FF92FFE01C1B3E4DFA896E86.text	038EF712FF92FFE01C1B3E4DFA896E86.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Briarosaccus tenellus Boschma 1970	<div><p>Briarosaccus tenellus from Sitka (Alaska)</p><p>The carapace width of the infested Hapalogaster mertensii ranges from 11.1 to 17.2 mm. All crabs are singly infested. The externa of Briarosaccus tenellus varies from 8.5 to 15.5 mm in length and from 2.5 to 4.5 mm in height. It is attached to the basal part of the soft ventral side of the host abdomen via a short stalk (Fig. 10A). Its long axis is at right angles to that of the host. The mature externa is elongated, cylindrical and slightly curved with the ventral outline being convex, and the dorsal outline concave. Anterior part of the externa is slightly bilobed and somewhat thicker than posterior one (Fig. 10B). It is oriented to the left side of the host. The opposite, posterior end of the externa is rounded. The stalk occurs near the central part of the dorsal side. The chitinous shield around the stalk is fusiform, has growth rings, and covers from 1/4 to 1/3 of the externa. The mantle opening is placed in the anterior part on the right side of the externa facing the host. It is not elevated, slit-like and surrounded by lips (Fig. 10B, G).</p><p>The external cuticle is smooth, without papillae or excrescences (Fig. 10E). It is covered with longitudinal grooves. A dorsal strip of transversal grooves from the mantle opening to the stalk is visible (Fig. 10D). In SEM, this strip and area around the mantle opening is cellular (Fig. 10F). The mantle opening is densely covered with numerous spines of 8–10 μm in length (Fig. 10H).</p><p>The internal cuticle is wrinkled and covered with sparse hairs of 4–8 μm in length which may be united in groups with a common base (Fig. 10I). Retinacula of 10–20 μm in length, densely barbed, single or united into groups of 2–4 are rarely found (Fig. 10J).</p></div>	https://treatment.plazi.org/id/038EF712FF92FFE01C1B3E4DFA896E86	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Korn, Olga M.;Golubinskaya, Darya D.;Sharina, Svetlana N.;Noever, Christoph;Glenner, Henrik	Korn, Olga M., Golubinskaya, Darya D., Sharina, Svetlana N., Noever, Christoph, Glenner, Henrik (2024): Rhizocephalan Barnacle Briarosaccus hoegi sp. nov. - a Parasite of the Stone Crab Hapalogaster dentata (De Haan, 1849) from Peter the Great Bay (Sea of Japan). Zoological Studies 63 (29): 1-16, DOI: 10.6620/ZS.2024.63-29, URL: http://dx.doi.org/10.5281/zenodo.14702068
