Nephtys sinopensis Kuş & Kurt & Çinar 2021, n. sp.
Diğer yayınlar > Diğer · 2021
Yazarlar: Kuş, Sevgi, Kurt, Güley, Çinar, Melih Ertan
Diğer, Uluslararası, 2021,
Özet
Nephtys sinopensis n. sp. (Figures 9–12) urn:lsid:zoobank.org:act: B5246F9A-7912-4CE0-A5D8-5B7F9B673F14 Material examined. Holotype: Black Sea: ESFM-POL/2016-243, 26 July 2016, station TRK25, 42°16’60”N, 34°56’14”E, 19.5 m, sand with shell fragments. Paratypes. Black Sea: ESFM-POL/2016-242, 25 July 2016, station TRK22, 42°2’34”N, 33°49’33”E, 22 m, shell fragments with phytodetritic material, 21 specimens; ESFM-POL/2016-244, 26 July 2016, station TRK25, 42°16’60”N, 34°56’14”E, 19.5 m, sand with shell fragments, 33 specimens; ESFM-POL/2016-245, 27 July 2016, station TRK32, 42°0’57.24”N, 35°9’28.51”E, 60 m, mud with shell fragments, 3 specimens; ESFM-POL/2016-246, 27 July 2016, station TRK35, 41°33’40”N, 36°34’19”E, 50 m, mud and phytodetritic material, 2 specimens. Additional material. Sea of Marmara: ESFM-POL/2013-1359, 06 June 2013, station Y1, 40°01’08’’N, 26°13’00’’E, 50 m, mud with detritic material, 1 specimen; ESFM-POL/2013-1360, 16 June 2013, station Y27, 40°23’30’’N, 29°03’54’’E, 10 m, mud with shell fragments, 2 specimens; ESFM-POL/2013-1362, 26 June 2013, station Y50, 41°12’16’’N, 29°07’15’’E, 10 m, mud with shell fragments; 8 specimens; Black Sea: ESFM-POL/2014- 645, 12 July 2014, station TRK7, 41°18’40”N, 29°40’10”E, 27 m, mud with shell fragments, 1 specimen; ESFM- POL/2014-646, 13 July 2014, station TRK10, 41°19’40”N, 30°47’55”E, 21 m, coarse sand with shell fragments, 15 specimens; ESFM-POL/2014-644, 13 July 2014, station TRKE1, 41°23’36”N, 31°38’11”E, 21 m, mud with shell fragments, 41 specimens; ESFM-POL/2014-647, 14 July 2014, station TRK13, 41°37’20”N, 31°51’3”E, 21 m, coarse sand with phytodetritic material, 5 specimens; ESFM-POL/2014-648, 15 July 2014, station TRK22, 42°2’34”N, 33°49’33”E, 25 m, mud with shell fragments, 23 specimens; ESFM-POL/2014-649, 15 July 2014, station TRK25, 42°16’60”N, 34°56’14”E, 21 m, mud with shell fragments, 2 specimens; ESFM-POL/2014-650, 17 July 2014, station TRK34Y, 41°33’40”N, 36°34’19”E, 21 m, mud with phytodetritic material, 1 specimen; ESFM-POL/2014-651, 17 July 2014, station TRK37, 41°19’40”N, 36°32’10”E, 10 m, mud with shell fragments, 1 specimen; ESFM-POL/2014-652, 18 July 2014, station TRK44, 41°4’2”N, 38°2’49”E, 52 m, shell fragments with phytodetritic material, 2 specimens; ESFM-POL/2014-653, 19 July 2014, station TRK55, 41°1’45”N, 39°54’15”E, 21 m, mud with shell fragments, 1 specimen; ESFM-POL/2015-294, 02 July 2015, station TRK1, 41°55’34”N, 28°12’27”E, 21 m, shell fragments with fine sand, 3 specimens; ESFM-POL/2015-295, 03 July 2015, station TRK7, 41°18’40”N, 29°40’10”E, 21 m, shell fragments with fine sand, 8 specimens; ESFM-POL/2015-296, 03 July 2015, station TRK10, 41°19’40”N, 30°47’55”E, 20 m, shell fragments with fine sand, 5 specimens; ESFM- POL/2015-293, 04 July 2015, station TRKE1, 41°23’36”N, 31°38’11”E, 13 m, shell fragments with phytodetritic material, 23 specimens; ESFM-POL/2015-297, 04 July 2015, station TRK13, 41°37’20”N, 31°51’3”E, 18 m, fine sand with shell and detritic fragments, 18 species; ESFM-POL/2015-298, 04 July 2015, station TRK13A, 41°35’23.22”N, 32°2’4.73”E, 17 m, shell fragments with fine sand, 7 specimens; ESFM-POL/2015-299, 05 July 2015, station TRK22, 42°02’34”N, 33°49’33”E, 21 m, phytodetritic material with shell fragments, 11 specimens; ESFM-POL/2015-300, 07 July 2015, station TRK35, 41°20’48”N, 36°23’27”E, 48 m, mud with fine sand and shell fragments, 3 specimens; ESFM-POL/2015-301, 08 July 2015, station TRK37, 41°19’40”N, 36°32’10”E, 9 m, mud with shell fragments and fine sand, 1 specimen; ESFM-POL/2016-239, 24 July 2016, station TRK10, 41°19’40”N, 30°47’55”E, 20 m, shell fragments with phytodetritic material, 2 specimens; ESFM-POL/2016-238, 24 July 2016, station TRKE1, 41°23’36”N, 31°38’11”E, 12 m, mud with shell fragments, 21 specimens; ESFM-POL/2016-240, 26 July 2016, station TRK13, 41°37’20”N, 31°51’3”E, 19 m, fine sand with shell fragments, 9 specimens; ESFM- POL/2016-241, 26 July 2016, station TRK16, 41°43’10”N, 32°4’60”E, 20 m, mud with phytodetritic material, 9 specimens; ESFM-POL/2017-198, 26 July 2016, station TRK13, 41°37’20”N, 31°51’3”E, 19 m, fine sand with shell fragments, 23 specimens; ESFM-POL/2017-199, 27 July 2017, station TRK22, 42°2’34”N, 33°49’33”E, 27 m, shell fragments with phytodetritic material, 1 specimen; ESFM-POL/2017-200, 27 July 2017, station TRK25, 42°16’60”N, 34°56’14”E, 19 m, mud with shell fragments, 21 specimens, ESFM-POL/2017-201, 30 July 2017, station TRK34Y, 41°19’40”N, 36°32’10”E, 20 m, mud with phytodetritic material, 1 specimen; ESFM-POL/2017- 202, 31 July 2017, station TRK37, 41°32’60”N, 36°40’40”E, 8 m, shell fragments with phytodetritic material, 1 specimen; ESFM-POL/2018-150, 22 July 2018, station TRK10, 41°19’40”N, 30°47’55”E, 21 m, fine sand, 1 specimen; ESFM-POL/2018-149, 22 July 2018, station TRKE1, 41°23’36”N, 31°38’11”E, 14 m, fine sand with shell fragments, 5 specimens; ESFM-POL/2018-151, 23 July 2018, station TRK13, 41°37’20”N, 31°51’3”E, 20 m, sandy mud with detritic material, 2 specimens; ESFM-POL/2018-152, 25 July 2018, station TRK22, 42°2’34”N, 33°49’33”E, 25 m, mud with shell fragments and detritic material, 5 specimens; ESFM-POL/2018-153, 26 July 2018, station TRK25, 42°16’60”N, 34°56’14”E, 20 m, sand, 1 specimen; ESFM-POL/2018-154, 28 July 2018, station TRK37, 41°32’60”N, 36°40’40”E, 8.5 m, sand, 1 specimen; ESFM-POL/2018-155, 01 August 2018, station TRK61, 41°46’0”N, 41°31’0”E, 45 m, mud with phytodetritic material, 1 specimen; ESFM-POL/2019-52, 05 July 2019, station TRK7, 41°18’40”N, 29°40’10”E, 22 m, mud, 3 specimens; ESFM-POL/2019-53, 07 July 2019, station TRKE1, 41°23’36”N, 31°38’11”E, 14 m, fine sand with shell fragments, 4 specimens; ESFM-POL/2019-54, station TRK22, 09 July 2019, 42°2’34”N, 33°49’33”E, 25 m, mud with shell fragments and detritic material, 1 specimen; ESFM-POL/2019-55, 09 July 2019, station TRK25, 42°16’60’’N, 34°56’14”E, 20 m, mud, 5 specimens. Other comparative material examined: Nephtys cirrosa Ehlers, 1868, Aegean Sea (Gökçeada), ESFM- POL/2000-625, 13 August 2000, 40˚07’22”N, 25˚39’50”E, 15 m, sand, 26 specimens. Description. Holotype complete, 11.5 mm long, 0.9 mm wide, with 55 chaetigers. Sizes of paratypes varies between 8–12 mm long and 0.6–0.8 mm wide with 47–58 chaetigers. Body wider anteriorly, gradually tapering from middle region to pygidium. Colour cream in ethanol. When pharynx everted, prostomium subpentagonal (0.17 mm) as long as wide, anterior margin convex, posterior margin “V” shaped (Figs. 9A, 10B); when pharynx not everted, prostomium subrectangular, anterior margin slightly convex, posterior margin “U” shaped (Fig. 10A), extending over chaetiger 1. Antennae (0.09 mm) and palps (0.07 mm) digitiform with swollen tips, palps slightly shorter than antennae, inserted on ventro-lateral margin of prostomium (Figs. 9A, 10A, B). Pharynx with 10 pairs of terminal bifid papillae (0.09 mm), separated by a dorsal and ventral gap (Figs. 9A, 10C); middorsal papilla slender (0.17 mm), conical, slightly longer than subterminal ones (0.09 mm) (Fig. 10C); midventral papilla absent; with 21–22 rows of 6–7 conical subterminal papillae, (3–4 long, 3–4 small papillae) extending over 2/3 length of pharynx (Figs. 9A, 10B), proximal region of pharynx smooth. One pair of light brown jaws, triangular in shape, on the antero-lateral margin of pharynx. (Fig. 9B). One pair of eyes visible in small specimens on chaetiger 3. Nuchal organ rounded, conspicuous. Parapodia of chaetiger 1 without dorsal cirri or lamellae, smaller than subsequent ones, directed anteriorly, close to prostomium. Ventral cirri of chaetiger 1 digitiform with a broad base and swollen tip (Figs. 9A, 10A, B), almost ½ times shorter than palps (0.03 mm). Parapodia biramous, interramal space “U” shaped anteriorly, becoming “V” shaped on posterior parapodia, covered with regular ciliated patches (Fig. 11C). Prechaetal lamellae well developed on chaetiger 2–3. Noto- and neuropodial postchaetal lamellae well developed on chaetiger 4 and 2, respectively. On anterior chaetigers (chaetiger 10), prechaetal lamellae well developed, simple and triangular in neuropodia, bilobed in notopodia; similar in size to acicular lobes in notopodia, slightly longer than acicular lobes in neuropodia; noto- and neuropodial postchaetal lamellae rounded, longer than acicular lobes (Figs. 9F, 10D). On middle chaetigers (chaetiger 20–40) prechaetal lamellae reducing gradually and fusing with acicular lobe (Figs. 9G, H, 11A); noto- and neuropodial postchaetal lamellae rounded (Fig. 11B), morphologically similar to those on anterior chaetigers, but neuropodial lamellae much longer, extending beyond acicular lobes. On posterior chaetigers (chaetiger 52) prechaetal lamellae almost reduced and appearing as a small piece of acicular lobe in neuropodia (Figs. 9I, 11C); noto- and neuropodial postchaetal lamellae, rounded, as long as acicular lobes (Figs. 9I, 11C, D). Acicular lobes rounded anteriorly, become conical on middle and posterior chaetigers (Figs. 9F–I, 11A, C, D). Dorsal cirri long, cirriform, as long as branchiae on first 7–8 anterior chaetigers and last 7–8 posterior chaetigers (Figs. 9F–I, 11D), smaller than branchiae on middle chaetigers, strongly covered with irregular ciliated patches. Ventral cirri long, digitiform with a tapering tip, almost equal in size to parapodial lobes in posterior chaetigers (Figs. 9F–I, 11D, 12C–E). Branchiae very small on all chaetigers, almost equal in length to dorsal cirri on anterior and posterior chaetigers, recurved in median region, straight in anterior and posterior region; cirriform, starting from chaetiger 4 to posterior end; well developed on chaetigers 9–10; occupying 1/2 of interramal space when fully developed (Figs. 9F–I, 11A, B), with densely ciliated patches, irregularly distributed. Four types of chaetae present in parapodia; capillary chaetae, barred chaetae, geniculate chaetae and spinose chaetae. Chaetiger 1 with 5–6 capillary chaetae in