Table 3 in Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration

Table 3. Table comparing species of Aphelochaeta likely to be found in the Falkland Islands region.
SpeciesProstomium shapeDT - 1st Br positionDorsal crest (DC)Anterior body shapeVentral grooveMGSA. longisetosaConical with rounded blunt tipDT situated laterally on distal edge of Per; 1st Br lateral to DTPresent on Per area but weakly developedWidens gradually but then remains same width down to pygidial area; dorsally flatFrom mid- thorax extending down abdominal sectionNo staining pattern observedA. cf. longisetosaConical with a blunt- pointed tipDT separated, situated laterally on distal edge of Peri; 1st Br lateral and distal to DTPresent on Per areaWidens gradual in thoracic region then narrows slightly near junction with abdominal region; dorsally humpedFrom mid- thorax extending down abdominal sectionBand or spot on ventral prostomial region extending into mouth, diffuse staining on sides of peristomium, distinct partial bands ventrally on thoracic chaetigersA. falklandica sp. nov.Prostomium wide, conical with rounded or ‘stumpy’ pointDT situated on distal edge of Per, 1st Br lateral or slight posterior.Present but better developed on proximal part of PerBody widening gradually in thorax then narrowing at junction with abdomen; dorsally flattened; dorsally flatFrom mid to posterior thoracic chaetigers down bodyBand ventral under the prostomium extending into the mouth, stain on the lateral part of the peristomium near to the junction with the first chaetiger, narrow bands along lateral and ventral edges of thoracic chaetigersA. palmeriBlunt pointed with slight indentations at junction with PerDT arise from junction of Per andCh1; 1st Br lateral and close to DTPresent, well developed extending over all PerGradually widening but not narrowing appreciably in anterior part of bodyShallow along entire bodyOnly weakly/diffuse stain on Per, distinct segmental bands which continue down whole body in some specimensA. maleficaProstomium pointed, triangularDT arise from junction of Per with Ch1; 1st Br lateral or slightly anterior to DT arising from junction.Present, well developed over the distal part of PerBody not widening appreciablyAbsentNo obvious patterns, diffuse staining on prostomium and peristomial region
Key: Ch1= chaetiger 1; DT = dorsal tentacles; Per = peristomium; 1st Br. = first branchia; MGS = methyl green stain.

表3. 福尔克兰群岛区域疑似分布的Aphelochaeta（Aphelochaeta）属物种比较表。
物种 口前叶形态 背触手（dorsal tentacles, DT）- 第一鳃（first branchia, 1st Br）位置 背脊（Dorsal crest, DC） 体前部形态 腹沟 甲基绿染色（methyl green stain, MGS）
A. longisetosa 圆锥形，具圆钝尖端 背触手侧生于围口节（peristomium, Per）远端边缘；第一鳃位于背触手外侧 围口节区域具背脊但发育较弱 体部逐渐加宽，至肛节区域维持宽度不变，背部平坦 自中胸段延伸至腹部区域 未观察到染色模式
A. cf. longisetosa 圆锥形，具钝尖尖端 背触手分离，侧生于围口节远端边缘；第一鳃位于背触手外侧且更靠远端 围口节区域存在背脊 胸段区域体部逐渐加宽，在与腹段连接处略微收窄，背部呈驼峰状 自中胸段延伸至腹部区域 口前叶腹侧具条带或斑点，延伸至口部，围口节侧面具弥散染色，胸段刚节腹侧具清晰的半环带
A. falklandica sp. nov. 口前叶宽阔，呈圆锥形，具圆形或"粗短"尖端 背触手生于围口节远端边缘，第一鳃位于背触手外侧或略靠后 存在，于围口节近端部分发育更佳 胸段区域体部逐渐加宽，在与腹段连接处收窄，背部平坦 自中胸至后胸刚节延伸至全体 口前叶腹侧具条带，延伸至口部，围口节侧面靠近第一刚节连接处具染色，胸段刚节侧缘及腹缘具细环带
A. palmeri 钝尖，与围口节连接处具轻微凹陷 背触手生于围口节与第一刚节（chaetiger 1, Ch1）的连接处，第一鳃位于背触手外侧且紧邻其旁 发育良好，覆盖整个围口节 体部逐渐加宽，前部区域无明显收窄 全体呈浅沟状 仅围口节具弱/弥散染色，部分标本的胸段刚节具清晰的分节环带，延伸至全体
A. malefica 尖细，呈三角形 背触手生于围口节与第一刚节的连接处，第一鳃位于背触手外侧或略靠前 存在，于围口节远端部分发育良好 体部无明显加宽 缺失 无明显染色模式，口前叶及围口节区域具弥散染色
注释：Ch1=第一刚节（chaetiger 1）；DT=背触手（dorsal tentacles）；Per=围口节（peristomium）；1st Br.=第一鳃（first branchia）；MGS=甲基绿染色（methyl green stain）。