Ceratonereis maya, Conde-Vela, 2021

Conde-Vela, Víctor Manuel, 2021, Revision of Ceratonereis Kinberg, 1865 recorded from the Caribbean Sea, with description of two new Ceratonereis species and a new combination of Platynereis Kinberg, 1865, Zootaxa 5026 (3), pp. 301-343: 319-323

publication ID

https://doi.org/10.11646/zootaxa.5026.3.1

publication LSID

lsid:zoobank.org:pub:ADCAF347-2787-4AEF-AE0F-B8D5B5968B66

persistent identifier

http://treatment.plazi.org/id/4E3F87EA-F437-FFB0-F89B-FF6CFDECDD0C

treatment provided by

Plazi

scientific name

Ceratonereis maya
status

n. sp.

Ceratonereis maya   n. sp.

Figures 11–12 View FIGURE 11 View FIGURE 12

Ceratonereis sp.   Perkins 1980: 32–34, figs 13a–f.

Ceratonereis (Ceratonereis) singularis singularis Hartmann-Schröder, 1985: 45   , figs 36–39.

Ceratonereis singularis Salazar-Vallejo & Jiménez-Cueto 1997: 365   (non Treadwell, 1929).

Ceratonereis excisa Salazar-Vallejo & Jiménez-Cueto 1997: 363   , figs 1, 15, 16, 37, 38 (partim, non Grube & Müller in Grube, 1873).

Type material. Caribbean Sea, Mexico. Holotype ECOSUR 0245 View Materials , Contoy Island , Quintana Roo (21°31’44.28”N 86°48’11.53”W), 1.5 m depth, 1 March 2001 GoogleMaps   , Coll S.I. Salazar-Vallejo, L.F. Carrera-Parra   . Paratypes ECOSUR 0246 View Materials (2), Contoy Island , Quintana Roo (21°31’44.28”N 86°48’11.53”W), 1.5 m depth, 1 March 2001 GoogleMaps   , Coll S.I. Salazar-Vallejo, L.F. Carrera-Parra   . Paratype ECOSUR 0247 View Materials (1), Cabo Catoche , Quintana Roo (21°36’32.06’’N 87°06’52.64’’W), 2.5 m depth, 10 May 2009, Coll. S.I. Salazar-Vallejo, L.F. Carrera-Parra. GoogleMaps  

Additional material. Gulf of Mexico, Mexico. ECOSUR 1120 View Materials (1), Laguna de Términos , Campeche, 27 July 1984   , Coll. E. Escobar. Caribbean Sea, Mexico. ECOSUR P1150 View Materials (4), Laguna Yalahau , Quintana Roo (21°30’N 87°15’W), 8 September 1993 GoogleMaps   , Coll. S.I. Salazar-Vallejo. ECOSUR P1157 View Materials (1), Punta Gorda , Quintana Roo (19°47’51.03” N 87°32’49.70”W), 27 August 1984 GoogleMaps   , Coll. E. Escobar. ECOSUR P1158 View Materials (1), Laguna Nichupté , Quintana Roo (21°06’11.6”N 86°47’21.1”W), 3 February 1988 GoogleMaps   , in seagrasses, Coll. M.S. Jiménez-Cueto. ECOSUR P1167 View Materials (2), Laguna Nichupté , Quintana Roo (21°06’11.6”N 86°47’21.1”W), 30 October 1987 GoogleMaps   , Coll. M.S. Jiménez- Cueto. ECOSUR P1197 View Materials (2), Laguna Nichupté , Quintana Roo (21°06’11.6”N 86°47’21.1”W), 5 July 1988 GoogleMaps   , Coll. M.S. Jiménez-Cueto. ECOSUR P1199 View Materials (1), Ría Lagartos , Yucatán (31º35’55.25”N, 88º9’23.9”W), 18 February 1999 GoogleMaps   , Coll. S.I. Salazar-Vallejo, J. R. Bastida-Zavala. ECOSUR P1200 View Materials (1), R / V Edwin Link, Sta. 2774 (18°45.63’N 87°15.84’W), Cayo Norte, Banco Chinchorro, Quintana Roo, 20 August 1990 GoogleMaps   , Coll. E. Escobar, L. Soto. ECOSUR P1201 View Materials (1), Punta Gavilán , Quintana Roo, 25 August 1990   , Coll. E. Escobar, L. Soto. ECOSUR 1202 View Materials (3 males), Punta Gavilán , Quintana Roo, 25 August 1990   , Coll. E. Escobar, L. Soto. ECOSUR P1203 View Materials (1), Punta allen, Quintana Roo (19º47’58”N, 87º28’29”W), 2 June 1986 GoogleMaps   , Coll. F.E. Donath. ECOSUR P1206 View Materials (1), Punta Hualastok , Bahía de la Ascensión, Quintana Roo, 28 April 1987   , Coll. M.S. Jiménez-Cueto. ECOSUR P1208 View Materials (2), Laguna de Términos , Campeche (18°39’7.29”N 91°32’25.22”W), 27 July 1984 GoogleMaps   , Coll. E. Escobar. ECOSUR P1220 View Materials (1), Buenavista , Quintana Roo (18°30’42’’N 87°45’30”W), 27 September 1996 GoogleMaps   , Coll. S.I. Salazar-Vallejo, L.F. Carrera-Parra. ECOSUR P3191 View Materials (1), Camping Beach, Contoy Island , Quintana Roo (21°28’28.9” N, 86°47’22.5” W), on seashell, 26 February 2008 GoogleMaps   . ECOSUR P3192 View Materials (1), Puerto Viejo, Contoy Island (21°29’19” N, 86°47’44” W), on mangrove roots, 24 February 2008 GoogleMaps   . ECOSUR P3193 View Materials (2), Contoy Island , Quintana Roo, Mexico, 1 March 2001   . Jamaica. UMML 22.1163 View Materials (1), R / V Pillsbury, Cruise 7006, Sta. 1258 (17°03’N 78°10’W), Pedro Banks, Jamaica, 15 m depth, 15 July 1970 GoogleMaps   . Nicaragua. UMML 22.1164 View Materials (1), R / V Pillsbury, Cruise 7101, Sta. 1330 (11°51’N 83°27’W), SE Nicaragua, 24 m depth, 28 January 1971 GoogleMaps   . Venezuela. USNM 47771 View Materials (1), Cumaná Key, Mochima , 12 m depth, 21 October 1971   , Coll. Edwards. USNM 49709 View Materials (1), La Gabarra Beach, Mochima Bay , 8 m depth, 11 May 1971   , Coll. R. Edwards   . British Virgin Islands. LACM-AHF 7370 (2) White Bay, Guana Island (18°28’32”N, 64°34’39”W), on artificial reef matrix structures (ARMs), 1.5 m depth, 9 July 2000 GoogleMaps   , Coll. T. Zimmerman, G. Hendler, R. Ware, K. Fitzhugh   .

Type locality. Contoy Island , Quintana Roo, Mexico, at 1.5 m depth ( Fig. 1 View FIGURE 1 )   .

Etymology. The specific term maya   is a noun in apposition. ‘Mayan people’ is a collective term commonly used to refer indigenous peoples living mainly in southeast Mexico, Guatemala, Belize, Honduras, and El Salvador.

Description. Holotype (ECOSUR 0245) is a complete atoke female, in excellent condition ( Fig. 11A–B, D–F View FIGURE 11 ), 240 mm long, 2.6 mm wide at chaetiger 10 excluding parapodia, 130 chaetigers, with oocytes present. Paratype (ECOSUR 0247) complete and in good condition ( Fig. 11C View FIGURE 11 ), 56 mm long, 1.5 mm wide at chaetiger 10 excluding parapodia, 65 chaetigers.

Body pale or yellowish, tapering ( Fig. 11A–F View FIGURE 11 ); with brown pigmentation in paratype ( Fig. 11C View FIGURE 11 ), prostomium with spots in the incision of anterior margin, two spots over the eyes, and a cordiform spot between posterior pair of eyes, achaetous ring and anterior segments with two transverse narrow bands, giving it a striate appearance, pigmentation progressively faded out toward posterior end.

Prostomium 1.5x wider than long, subpentagonal, anterior margin deeply incised, dorsal groove present ( Fig. 11A, C–D View FIGURE 11 ).

Antennae lanceolate, 1.3x longer than prostomium, not extending slight beyond palps ( Fig. 11A, C–D View FIGURE 11 ).

Eyes rounded, subequal, in trapezoidal arrangement, blackish, as wide as basal diameter of antennae, lenses not visible, anterior pair sometimes reniform, posterior pair not covered by achaetous ring ( Fig. 11A, C–D View FIGURE 11 ).

Achaetous ring twice longer than chaetiger 1, anterior margin convex ( Fig. 11A, C–D View FIGURE 11 ).

Tentacular cirri smooth, posterodorsal cirri extending backwards to chaetiger 16 ( Fig. 11A, C–D View FIGURE 11 ).

Pharynx everted in holotype ( Fig. 11A, E–F View FIGURE 11 ). Jaws brown with 8 teeth along cutting edge ( Fig. 12H View FIGURE 12 ). Maxillary ring cylindrical, oral ring frustum-shaped, 1.6x longer and 1.4x wider than maxillary ring ( Fig. 11E–F View FIGURE 11 ).

Maxillary ring: I=0; IIa= 8 and IIb= 7 cones in arc; III= 8 cones in round; IVa= 9 and IVb= 10 cones in round ( Fig. 11E–F View FIGURE 11 ). Oral ring: V= 0; VIa-b= 1 rounded papilla; VII-VIII= 0 ( Fig. 11E–F View FIGURE 11 ). Ridge pattern of areas VI–V–VI, λ-shaped.

Paired oesophageal caeca absent.

Dorsal cirri filiform, progressively relatively longer; 3.2x longer than neuroacicular ligule in chaetiger 1, 5.5x longer in chaetiger 12, 9x longer in chaetiger 30, 6.8x longer in chaetiger 81, 10.4x longer in chaetiger 121 ( Fig. 12A–F View FIGURE 12 ).

Dorsal ligule subconical or digitiform, progressively shorter toward posterior chaetigers, present throughout; 1.4x longer than neuroacicular ligule in chaetiger 12, 1.2x longer in chaetiger 30, 0.2x length of neuroacicular ligule in chaetiger 81, strongly reduced from chaetiger 121 ( Fig. 12A–E View FIGURE 12 ); posterior chaetigers in paratype with dorsal ligules throughout, 0.3x length in chaetiger 52, 0.6x length in chaetiger 65 ( Fig. 12F–G View FIGURE 12 ).

Notopodial prechaetal lobe absent throughout.

Median ligule subconical; 1.5x longer in chaetiger 12, 1.8x longer in chaetiger 30, 0.7x length of neuroacicular ligule in chaetiger 81, 0.8x length in chaetiger 121 ( Fig. 12A–G View FIGURE 12 ).

Neuroacicular ligule subconical throughout, mucronate in middle and posterior chaetigers, progressively relatively longer and wider toward posterior chaetigers ( Fig. 12A–G View FIGURE 12 ). Neuropodial superior and inferior lobes absent ( Fig. 12A–G View FIGURE 12 ).

Neuropodial postchaetal lobe digitiform in first two chaetigers, lamelliform and shorter than neuroacicular ligules thereafter, disappearing toward most posterior chaetigers ( Fig. 12A–G View FIGURE 12 ).

Ventral ligule digitiform throughout, progressively shorter toward posterior chaetigers; 1.3x longer than neuroacicular ligule in chaetiger 1, as long as in chaetiger 12, 0.6x length of neuroacicular ligule in chaetiger 30, 0.2x length in chaetiger 81, 0.3x length in chaetiger 121 ( Fig. 12A–G View FIGURE 12 ).

Ventral cirrus filiform, extending beyond tip of neuroacicular ligule in posteriormost chaetigers; 1.6x longer than neuroacicular ligule in chaetiger 1, 1.7x longer in chaetigers 12 and 30, 1.2x length in chaetiger 81, 2x length in chaetiger 121 ( Fig. 12A–G View FIGURE 12 ).

Aciculae amber throughout. Notoaciculae present in first two chaetigers ( Fig. 12A View FIGURE 12 ). Notoaciculae narrower than neuroaciculae in anterior chaetigers, becoming as wide as in following chaetigers ( Fig. 12A–G View FIGURE 12 ).

Notochaetae both short-bossed heterogomph spinigers and falcigers; spinigers in all chaetigers, pectinate, teeth minute, decreasing in size toward tip ( Fig. 12K View FIGURE 12 ); falcigers appearing from chaetigers 15–17, pectinate, basal teeth minute and greatly increasing in size toward distal blade, distal teeth not extending beyond blade tip in middle chaetigers and extending beyond toward posterior ones ( Fig. 12I–J View FIGURE 12 ), blade tip rounded throughout, shaft becoming slightly stouter toward posterior chaetigers ( Fig. 12I–J View FIGURE 12 ).

Supracicular neurochaetae short-bossed heterogomph spinigers and long-bossed heterogomph falcigers; spinigers with blades as in notopodial ones; falcigers pectinate, increasing in size toward distal blade, distal teeth extending beyond blade tip, blade tip rounded throughout, blades becoming wider toward posterior chaetigers ( Fig. 12M View FIGURE 12 ).

Infracicular neurochaetae both long-bossed heterogomph spinigers and falcigers; spinigers with blades pectinate, basal teeth coarse and greatly decreasing in size and becoming minute toward distal blade ( Fig. 12N View FIGURE 12 ); falcigers pectinate, basal teeth minute and greatly increasing in size toward distal blade ( Fig. 12L, O View FIGURE 12 ), distal teeth extending beyond blade tip, blade tip rounded throughout ( Fig. 12L, O View FIGURE 12 ), blades shorter than supracicular falcigers in anterior chaetigers and becoming longer toward posterior ones, uppermost falcigers with longer and narrower blades than lowermost ones ( Fig. 12L View FIGURE 12 ).

Pygidium swollen, funnel-shaped; anal cirri missing ( Fig. 11B View FIGURE 11 ).

Remarks. The holotype is the largest specimen, being several times larger than the remaining material and more than 100 chaetigers. Of the specimens examined, only the holotype (last 5 chaetigers) and one paratype (ECOSUR P1150) (last 2 chaetigers) have inconspicuous dorsal ligules in posterior-most chaetigers. In the first instance, the inconspicuous dorsal ligules in a few posterior-most chaetigers were attributed to the size and number of chaetigers in the holotype. This situation is similar to that found in Ceratonereis australis Hartmann-Schröder, 1985   having inconspicuous dorsal ligules in few posterior-most chaetigers and the number of chaetigers of the holotype is 100 chaetigers or greater ( Hartmann-Schröder 1985). However, the finding of a complete small specimen demonstrated the presence of very reduced dorsal ligules, so the size was discarded for this species as a factor for this feature.

Perkins (1980) studied some specimens from Venezuela, finding a high resemblance to C. singularis   ; however, the condition and number of species prevented an adequate description for a new species, naming it as Ceratonereis sp.   Specimens studied by him, and deposited in USNM, were examined and are identical to those collected in the Mexican Caribbean. Hartmann-Schröder (1985) proposed the new subspecies Ceratonereis (Ceratonereis) singularis singularis   for the form identified by Perkins as Ceratonereis sp.   Type and additional materials of C. singularis   from Western Mexico were examined to study if they belong to the same species, and they demonstrate to be distinct, and a new name for the new species C. maya   n. sp. is proposed to avoid homonymy with C. singularis Treadwell, 1929   when elevated to the species level.

There are several differences between C. singularis   and C. maya   n. sp. allowing their clear separation: 1) in C. maya   n. sp., dorsal cirri are relatively longer throughout body than in C. singularis   ; 2) in C. maya   n. sp., the dorsal ligules are much narrower than neuroacicular ligules in middle chaetigers, whereas in C. singularis   they have similar wide; 3) in C. maya   n. sp., both dorsal and ventral ligules reduce greatly their size toward posterior chaetigers, becoming papillae-like in posterior-most chaetigers and even inconspicuous, whereas in C. singularis   they are relatively larger in posterior chaetigers; 4) the blades of notopodial short-bossed heterogomph falcigers in C. maya   n. sp. are subequal in the same fascicle, whereas in C. singularis   they can have different lengths; 5) pygidium in C. maya   n. sp. is funnel-shaped, whereas in C. singularis   it is tripartite and minute.

Distribution. Caribbean Sea.

ECOSUR

El Colegio de la Frontera Sur (Mexico)

R

Departamento de Geologia, Universidad de Chile

V

Royal British Columbia Museum - Herbarium

T

Tavera, Department of Geology and Geophysics

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Phyllodocida

Family

Nereididae

Genus

Ceratonereis

Loc

Ceratonereis maya

Conde-Vela, Víctor Manuel 2021
2021
Loc

Ceratonereis singularis Salazar-Vallejo & Jiménez-Cueto 1997: 365

Salazar-Vallejo, S. I. & Jimenez-Cueto, M. S. 1997: 365
1997
Loc

Ceratonereis excisa Salazar-Vallejo & Jiménez-Cueto 1997: 363

Salazar-Vallejo, S. I. & Jimenez-Cueto, M. S. 1997: 363
1997
Loc

Ceratonereis (Ceratonereis) singularis singularis Hartmann-Schröder, 1985: 45

Hartmann-Schroder, G. 1985: 45
1985
Loc

Ceratonereis sp.

Perkins, T. H. 1980: 32
1980